Fluid drag reduction and efficient self

What a Drag Effects of Fluid Viscosity on Centrifugal

Nov 15,2017 Fluid drag reduction and efficient self#0183;A better and less flippant answer is to consider the reduction in pump efficiency (also head and flow) and calculate the maximum required and corrected horsepower (hp) for the viscous fluid.Several references limit centrifugal pumps to a maximum of 3,000 centistokes.Viscosity and Laminar Flow; Poiseuilles Law PhysicsA force F is required to keep the top plate in Figure 3 moving at a constant velocity v,and experiments have shown that this force depends on four factors.First,F is directly proportional to v (until the speed is so high that turbulence occursthen a much larger force is needed,and it has a more complicated dependence on v).Second,F is proportional to the area A of the plate.Viscosity and Laminar Flow; Poiseuilles Law PhysicsA force F is required to keep the top plate in Figure 3 moving at a constant velocity v,and experiments have shown that this force depends on four factors.First,F is directly proportional to v (until the speed is so high that turbulence occursthen a much larger force is needed,and it has a more complicated dependence on v).Second,F is proportional to the area A of the plate.

US8039055B2 - Method to increase the efficiency of

A method for increasing the efficiency of additive drag reduction by establishing a drag-reducing viscoelastic coating on a surface.The method includes mixing a polymer into a concentrated solution that has approximately the same density as a fluid flowing over the surface,ejecting the mixture/solution into the flowing fluid in a manner such that a coating of polymer,which initially grows The fluid control mechanism of bionic structural Studies have shown that the structure of dolphin skin controls fluid media dynamically.Gaining inspiration from this phenomenon,a kind of bionic structural heterogeneous composite material was deSome results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextNuFlo Drag Reducing Agent - NuGenTecNuFlo Drag Reducers are a cost-effective way to reduce friction and turbulence in a pipeline,thereby allowing the crude oil to flow more efficiently.This non-hazardous flow improver maximizes pumping efficiency and increases throughput and flow rate in the pipeline.NuFlo Drag Reducers are applied at a dosage of 3-100 ppm.

Some results are removed in response to a notice of local law requirement.For more information,please see here.12345Next6 Simple Ways to Reduce Water Retention

Jul 31,2018 Fluid drag reduction and efficient self#0183;Water retention occurs when excess fluids build up inside your body.It is also known as fluid retention or edema.Water retention occurs in the circulatory system or within tissues and cavities.Some results are removed in response to a notice of local law requirement.For more information,please see here.Shark Skin Surface for Fluid-Drag Reduction in Turbulent Abstract.Nature has created ways of reducing drag in fluid flow,evident in the efficient movement of fish,dolphins,and sharks.The mucus secreted by fish reduces drag as they move through water,protects the fish from abrasion by making the fish slide across objects rather than scrape,and prevents disease by making the surface of the fish difficult for microscopic organisms to adhere to

Self-Consistent Computational Fluid Dynamics of Supersonic

We present applications of laser-energy deposition for drag reduction in supersonic flow.The system of chemically reactive NavierStokes equations describes the hydrodynamics where nonequilibrium Reduction of granular drag inspired by self-burrowing Apr 17,2017 Fluid drag reduction and efficient self#0183;We present quantitative measurements and mat hematical analysis of the granular drag reduction by rotation,as motivated by the digging of Erodium and Pelargonium seeds.The seeds create a motion to dig into soil before germination using their moisture-responsive awns,which are originally helical shaped but reversibly deform to a linear configuration in a humid environment.Pumping performance increase through the addition of The addition of a small amount of long chain polymers to a turbulent fluid is known to reduce the wall shear stress and drag.Similarly,the addition of pulp fibres to a turbulent suspension is also turbulent-drag reducing despite pulp fibres having a length scale that is 1000 times larger than polymer molecules.The mechanism of drag reduction and its impact on centrifugal pump performance is

Petroleum Engineer's Guide to Oil Field Chemicals and

This chapter deals almost exclusively with the state of drag reduction in pipelines for liquid transportation.Drag reducing additives are important in oil drilling applications and the maintenance of pumping equipment in pipelines.Flow drag in pipes can be reduced by adding a small amount of high molecular polymer.Passive separation control using a self-adaptive hairy Blue colours denote clockwise vorticity.Only reference cilia are shown in the figure,modeling a dense coating which self-adapts to the surrounding flow.Bottom frames display the time history of the drag and lift coefficients with solid lines (dashed lines represent the case without actuators).Video (3.2 MB)NuFlo Drag Reducing Agent - NuGenTecNuFlo Drag Reducers are a cost-effective way to reduce friction and turbulence in a pipeline,thereby allowing the crude oil to flow more efficiently.This non-hazardous flow improver maximizes pumping efficiency and increases throughput and flow rate in the pipeline.NuFlo Drag Reducers are applied at a dosage of 3-100 ppm.

Fluid drag reduction and efficient self-cleaning with rice

Request PDF Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces Researchers are continually inspired by living nature to solve complex Fluid drag reduction and efficient self-cleaning with rice Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces G.D.Bixler and B.Bhushan,Nanoscale,2013,5,7685 DOI 10.1039/C3NR01710A If you are not the Fluid drag reduction and efficient self-cleaning with rice DOI 10.1039/c3nr01710a Corpus ID 11115198.Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired [email protected]{Bixler2013FluidDR,title={Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces.},author={Gregory D.Bixler and B.Bhushan},journal={Nanoscale},year={2013},volume={5 17},pages={ 7685

Fluid drag reduction and efficient self-cleaning with rice

Aug 01,2013 Fluid drag reduction and efficient self#0183;Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces Bixler,Gregory D.; Bhushan,Bharat; Abstract.Researchers are continually inspired by living nature to solve complex challenges.For example,unique surface characteristics of rice leaves and butterfly wings combine the shark skin Flippers provide lift,reduce drag Humpback Whale Wind tunnel tests of model humpback flippers with and without leading-edge tubercles have demonstrated the fluid dynamic improvements tubercles make,such as a staggering 32% reduction in drag,8% improvement in lift,and a 40% increase in angle of attack over smooth flippers before stalling.Flapping and Bending Bodies Interacting with Fluid Flows The flapping or bending of a flexible planar structure in a surrounding fluid flow,which includes the flapping of flags and the self-streamlining of flexible bodies,constitutes a central problem in the field of fluid-body interactions.Here we review recent,highly detailed experiments that reveal new nonlinear phenomena in these systems,as well as advances in theoretical understanding

Flapping and Bending Bodies Interacting with Fluid Flows

The flapping or bending of a flexible planar structure in a surrounding fluid flow,which includes the flapping of flags and the self-streamlining of flexible bodies,constitutes a central problem in the field of fluid-body interactions.Here we review recent,highly detailed experiments that reveal new nonlinear phenomena in these systems,as well as advances in theoretical understanding Figure 1 from Fluid drag reduction and efficient self The self-cleaning lotus leaf SEM images show the hierarchical micropapillae,which are micro-sized bumps covered with waxy nanostructures (adapted from ref.14).Such structures lead to superhydrophobicity and low adhesion.- Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces.Drag Coefficient - ThermopediaMar 16,2011 Fluid drag reduction and efficient self#0183;where ,and v s are the velocity vectors of the fluid and the body,is the relative velocity of the body, the liquid (gas) density,S the midship section area of the body,and C d the drag coefficient.This relation follows from similarity theory and is extensively used in engineering for simplified calculation of the force acting on a body or a particle in liquid or gas in which it moves.

Drag Coefficient - Thermopedia

Mar 16,2011 Fluid drag reduction and efficient self#0183;where ,and v s are the velocity vectors of the fluid and the body,is the relative velocity of the body, the liquid (gas) density,S the midship section area of the body,and C d the drag coefficient.This relation follows from similarity theory and is extensively used in engineering for simplified calculation of the force acting on a body or a particle in liquid or gas in which it moves.Direct Numerical Simulations of Turbulent Flow Over Riblets reduce skin-friction drag until their viscous-scaled size becomes large enough for turbulence to approach the wall,leading to the breakdown of drag-reduction.In order to investigate inertial-flow mechanisms that are responsible for the breakdown,we employ the minimal-span channel concept for cost-efficient direct numerical simulation (DNS) of rough-wall flows (MacDonald et al.in J DRAG DUE TO LIFT Concepts for Prediction and Reduction This article describes some of the fundamental ideas underlying methods for induced-drag prediction and reduction.A review of current analysis and design methods,including their development and common approximations,is followed by a survey of several approaches to lift-dependent drag reduction.Recent concepts for wing planform optimization,highly nonplanar surfaces,and various tip

DRAG DUE TO LIFT Concepts for Prediction and Reduction

This article describes some of the fundamental ideas underlying methods for induced-drag prediction and reduction.A review of current analysis and design methods,including their development and common approximations,is followed by a survey of several approaches to lift-dependent drag reduction.Recent concepts for wing planform optimization,highly nonplanar surfaces,and various tip Cited by 172Publish Year 2013Author Gregory D.Bixler,Bharat BhushanFluid drag reduction and efficient self-cleaning with rice Jun 20,2013 Fluid drag reduction and efficient self#0183;Read Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces,Nanoscale on DeepDyve,the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.CHAPTER 3 PRESSURE AND FLUID STATICS(a) The fluid level in the arm attached to the tank is higher (vacuum) PP P Fluid drag reduction and efficient selfabs atm vac 12 7 1 26 11 44 psia 11.4 psia (b) The fluid level in the arm attached to the tank is lower PP P Fluid drag reduction and efficient selfabs gage atm 12 7 1 26 13 96 psia 14.0 psia Discussion The final results are reported to three significant digits.Note

Analysis of Drag Reduction Methods and Mechanisms of

Firstly,bionic drag reduction technology is reviewed and is a hot research issue now,the drag reduction mechanism of body surface structure is analyzed,such as sharks,earthworms,and dolphins.Besides,we make a thorough study of drag reduction characteristics and mechanisms of microgrooved surface and compliant wall.Analysis of Drag Reduction Methods and Mechanisms ofFirstly,bionic drag reduction technology is reviewed and is a hot research issue now,the drag reduction mechanism of body surface structure is analyzed,such as sharks,earthworms,and dolphins.Besides,we make a thorough study of drag reduction characteristics and mechanisms of microgrooved surface and compliant wall.Aerodynamic Drag Reduction of Class 8 Tractor-Trailers This is a dimensionless quantity that is used to quantify the drag or resistance of an object in fluid flow,such as air or water.F.d = force of the drag.= the density of the fluid (1.2kg/m.3) V= the speed of the object relative to the fluid.A=frontal area.C.d = the drag coefficient.Drag force Equation.Drag coefficient Equation

Aerodynamic Drag The Physics Hypertextbook

Discussion pressure drag.The force on an object that resists its motion through a fluid is called drag.When the fluid is a gas like air,it is called aerodynamic drag or air resistance.When the fluid is a liquid like water it is called hydrodynamic drag,but never water resistance..Fluids are characterized by their ability to flow.A unified view of energetic efficiency in active drag Aug 01,2013 Fluid drag reduction and efficient self#0183;Whether the objective is to achieve reduction in drag,increase in thrust,or efficient propulsion an analysis of energetic efficiency is of utmost importance.A successful active or passive drag reduction strategy should not only reduce drag but also decrease the total power consumption (Quadrio,2011).For a given propelling speed an A unified view of energetic efficiency in active drag Aug 01,2013 Fluid drag reduction and efficient self#0183;Whether the objective is to achieve reduction in drag,increase in thrust,or efficient propulsion an analysis of energetic efficiency is of utmost importance.A successful active or passive drag reduction strategy should not only reduce drag but also decrease the total power consumption (Quadrio,2011).For a given propelling speed an

A lubricant-infused slip surface for drag reduction

Sep 15,2020 Fluid drag reduction and efficient self#0183;This slippery lubricant layer contributes to drag reduction by lessening the velocity gradient of the surrounding fluid.The hydrodynamics of the slip surface was examined by scrutinizing the effects of varying the open area and the lid thickness on the slip velocity and length,the dispersion area,and the lubricant consumption.A lubricant-infused slip surface for drag reduction Sep 15,2020 Fluid drag reduction and efficient self#0183;This slippery lubricant layer contributes to drag reduction by lessening the velocity gradient of the surrounding fluid.The hydrodynamics of the slip surface was examined by scrutinizing the effects of varying the open area and the lid thickness on the slip velocity and length,the dispersion area,and the lubricant consumption. Fluid drag reduction and efficient self#181;LASE - CAV Systems Fluid drag reduction and efficient self#181;LASE. Fluid drag reduction and efficient self#181;LASE enables the only HLFC drag reduction system currently deployed on commercial aircraft.The technology can be used to increase efficiencies for business jets to large aircraft types and can save a typical wide body commercial airliner in the region of

What a Drag Effects of Fluid Viscosity on Centrifugal

Nov 15,2017 Fluid drag reduction and efficient self#0183;A better and less flippant answer is to consider the reduction in pump efficiency (also head and flow) and calculate the maximum required and corrected horsepower (hp) for the viscous fluid.Several references limit centrifugal pumps to a maximum of 3,000 centistokes.Viscosity and Laminar Flow; Poiseuilles Law PhysicsA force F is required to keep the top plate in Figure 3 moving at a constant velocity v,and experiments have shown that this force depends on four factors.First,F is directly proportional to v (until the speed is so high that turbulence occursthen a much larger force is needed,and it has a more complicated dependence on v).Second,F is proportional to the area A of the plate.Viscosity and Laminar Flow; Poiseuilles Law PhysicsA force F is required to keep the top plate in Figure 3 moving at a constant velocity v,and experiments have shown that this force depends on four factors.First,F is directly proportional to v (until the speed is so high that turbulence occursthen a much larger force is needed,and it has a more complicated dependence on v).Second,F is proportional to the area A of the plate.

US8039055B2 - Method to increase the efficiency of

A method for increasing the efficiency of additive drag reduction by establishing a drag-reducing viscoelastic coating on a surface.The method includes mixing a polymer into a concentrated solution that has approximately the same density as a fluid flowing over the surface,ejecting the mixture/solution into the flowing fluid in a manner such that a coating of polymer,which initially grows The fluid control mechanism of bionic structural Studies have shown that the structure of dolphin skin controls fluid media dynamically.Gaining inspiration from this phenomenon,a kind of bionic structural heterogeneous composite material was deSome results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextNuFlo Drag Reducing Agent - NuGenTecNuFlo Drag Reducers are a cost-effective way to reduce friction and turbulence in a pipeline,thereby allowing the crude oil to flow more efficiently.This non-hazardous flow improver maximizes pumping efficiency and increases throughput and flow rate in the pipeline.NuFlo Drag Reducers are applied at a dosage of 3-100 ppm.

Some results are removed in response to a notice of local law requirement.For more information,please see here.12345Next6 Simple Ways to Reduce Water Retention

Jul 31,2018 Fluid drag reduction and efficient self#0183;Water retention occurs when excess fluids build up inside your body.It is also known as fluid retention or edema.Water retention occurs in the circulatory system or within tissues and cavities.Some results are removed in response to a notice of local law requirement.For more information,please see here.Shark Skin Surface for Fluid-Drag Reduction in Turbulent Abstract.Nature has created ways of reducing drag in fluid flow,evident in the efficient movement of fish,dolphins,and sharks.The mucus secreted by fish reduces drag as they move through water,protects the fish from abrasion by making the fish slide across objects rather than scrape,and prevents disease by making the surface of the fish difficult for microscopic organisms to adhere to

Self-Consistent Computational Fluid Dynamics of Supersonic

We present applications of laser-energy deposition for drag reduction in supersonic flow.The system of chemically reactive NavierStokes equations describes the hydrodynamics where nonequilibrium Reduction of granular drag inspired by self-burrowing Apr 17,2017 Fluid drag reduction and efficient self#0183;We present quantitative measurements and mat hematical analysis of the granular drag reduction by rotation,as motivated by the digging of Erodium and Pelargonium seeds.The seeds create a motion to dig into soil before germination using their moisture-responsive awns,which are originally helical shaped but reversibly deform to a linear configuration in a humid environment.Pumping performance increase through the addition of The addition of a small amount of long chain polymers to a turbulent fluid is known to reduce the wall shear stress and drag.Similarly,the addition of pulp fibres to a turbulent suspension is also turbulent-drag reducing despite pulp fibres having a length scale that is 1000 times larger than polymer molecules.The mechanism of drag reduction and its impact on centrifugal pump performance is

Petroleum Engineer's Guide to Oil Field Chemicals and

This chapter deals almost exclusively with the state of drag reduction in pipelines for liquid transportation.Drag reducing additives are important in oil drilling applications and the maintenance of pumping equipment in pipelines.Flow drag in pipes can be reduced by adding a small amount of high molecular polymer.Passive separation control using a self-adaptive hairy Blue colours denote clockwise vorticity.Only reference cilia are shown in the figure,modeling a dense coating which self-adapts to the surrounding flow.Bottom frames display the time history of the drag and lift coefficients with solid lines (dashed lines represent the case without actuators).Video (3.2 MB)NuFlo Drag Reducing Agent - NuGenTecNuFlo Drag Reducers are a cost-effective way to reduce friction and turbulence in a pipeline,thereby allowing the crude oil to flow more efficiently.This non-hazardous flow improver maximizes pumping efficiency and increases throughput and flow rate in the pipeline.NuFlo Drag Reducers are applied at a dosage of 3-100 ppm.

Fluid drag reduction and efficient self-cleaning with rice

Request PDF Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces Researchers are continually inspired by living nature to solve complex Fluid drag reduction and efficient self-cleaning with rice Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces G.D.Bixler and B.Bhushan,Nanoscale,2013,5,7685 DOI 10.1039/C3NR01710A If you are not the Fluid drag reduction and efficient self-cleaning with rice DOI 10.1039/c3nr01710a Corpus ID 11115198.Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired [email protected]{Bixler2013FluidDR,title={Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces.},author={Gregory D.Bixler and B.Bhushan},journal={Nanoscale},year={2013},volume={5 17},pages={ 7685

Fluid drag reduction and efficient self-cleaning with rice

Aug 01,2013 Fluid drag reduction and efficient self#0183;Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces Bixler,Gregory D.; Bhushan,Bharat; Abstract.Researchers are continually inspired by living nature to solve complex challenges.For example,unique surface characteristics of rice leaves and butterfly wings combine the shark skin Flippers provide lift,reduce drag Humpback Whale Wind tunnel tests of model humpback flippers with and without leading-edge tubercles have demonstrated the fluid dynamic improvements tubercles make,such as a staggering 32% reduction in drag,8% improvement in lift,and a 40% increase in angle of attack over smooth flippers before stalling.Flapping and Bending Bodies Interacting with Fluid Flows The flapping or bending of a flexible planar structure in a surrounding fluid flow,which includes the flapping of flags and the self-streamlining of flexible bodies,constitutes a central problem in the field of fluid-body interactions.Here we review recent,highly detailed experiments that reveal new nonlinear phenomena in these systems,as well as advances in theoretical understanding

Flapping and Bending Bodies Interacting with Fluid Flows

The flapping or bending of a flexible planar structure in a surrounding fluid flow,which includes the flapping of flags and the self-streamlining of flexible bodies,constitutes a central problem in the field of fluid-body interactions.Here we review recent,highly detailed experiments that reveal new nonlinear phenomena in these systems,as well as advances in theoretical understanding Figure 1 from Fluid drag reduction and efficient self The self-cleaning lotus leaf SEM images show the hierarchical micropapillae,which are micro-sized bumps covered with waxy nanostructures (adapted from ref.14).Such structures lead to superhydrophobicity and low adhesion.- Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces.Drag Coefficient - ThermopediaMar 16,2011 Fluid drag reduction and efficient self#0183;where ,and v s are the velocity vectors of the fluid and the body,is the relative velocity of the body, the liquid (gas) density,S the midship section area of the body,and C d the drag coefficient.This relation follows from similarity theory and is extensively used in engineering for simplified calculation of the force acting on a body or a particle in liquid or gas in which it moves.

Drag Coefficient - Thermopedia

Mar 16,2011 Fluid drag reduction and efficient self#0183;where ,and v s are the velocity vectors of the fluid and the body,is the relative velocity of the body, the liquid (gas) density,S the midship section area of the body,and C d the drag coefficient.This relation follows from similarity theory and is extensively used in engineering for simplified calculation of the force acting on a body or a particle in liquid or gas in which it moves.Direct Numerical Simulations of Turbulent Flow Over Riblets reduce skin-friction drag until their viscous-scaled size becomes large enough for turbulence to approach the wall,leading to the breakdown of drag-reduction.In order to investigate inertial-flow mechanisms that are responsible for the breakdown,we employ the minimal-span channel concept for cost-efficient direct numerical simulation (DNS) of rough-wall flows (MacDonald et al.in J DRAG DUE TO LIFT Concepts for Prediction and Reduction This article describes some of the fundamental ideas underlying methods for induced-drag prediction and reduction.A review of current analysis and design methods,including their development and common approximations,is followed by a survey of several approaches to lift-dependent drag reduction.Recent concepts for wing planform optimization,highly nonplanar surfaces,and various tip

DRAG DUE TO LIFT Concepts for Prediction and Reduction

This article describes some of the fundamental ideas underlying methods for induced-drag prediction and reduction.A review of current analysis and design methods,including their development and common approximations,is followed by a survey of several approaches to lift-dependent drag reduction.Recent concepts for wing planform optimization,highly nonplanar surfaces,and various tip Cited by 172Publish Year 2013Author Gregory D.Bixler,Bharat BhushanFluid drag reduction and efficient self-cleaning with rice Jun 20,2013 Fluid drag reduction and efficient self#0183;Read Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces,Nanoscale on DeepDyve,the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.CHAPTER 3 PRESSURE AND FLUID STATICS(a) The fluid level in the arm attached to the tank is higher (vacuum) PP P Fluid drag reduction and efficient selfabs atm vac 12 7 1 26 11 44 psia 11.4 psia (b) The fluid level in the arm attached to the tank is lower PP P Fluid drag reduction and efficient selfabs gage atm 12 7 1 26 13 96 psia 14.0 psia Discussion The final results are reported to three significant digits.Note

Analysis of Drag Reduction Methods and Mechanisms of

Firstly,bionic drag reduction technology is reviewed and is a hot research issue now,the drag reduction mechanism of body surface structure is analyzed,such as sharks,earthworms,and dolphins.Besides,we make a thorough study of drag reduction characteristics and mechanisms of microgrooved surface and compliant wall.Analysis of Drag Reduction Methods and Mechanisms ofFirstly,bionic drag reduction technology is reviewed and is a hot research issue now,the drag reduction mechanism of body surface structure is analyzed,such as sharks,earthworms,and dolphins.Besides,we make a thorough study of drag reduction characteristics and mechanisms of microgrooved surface and compliant wall.Aerodynamic Drag Reduction of Class 8 Tractor-Trailers This is a dimensionless quantity that is used to quantify the drag or resistance of an object in fluid flow,such as air or water.F.d = force of the drag.= the density of the fluid (1.2kg/m.3) V= the speed of the object relative to the fluid.A=frontal area.C.d = the drag coefficient.Drag force Equation.Drag coefficient Equation

Aerodynamic Drag The Physics Hypertextbook

Discussion pressure drag.The force on an object that resists its motion through a fluid is called drag.When the fluid is a gas like air,it is called aerodynamic drag or air resistance.When the fluid is a liquid like water it is called hydrodynamic drag,but never water resistance..Fluids are characterized by their ability to flow.A unified view of energetic efficiency in active drag Aug 01,2013 Fluid drag reduction and efficient self#0183;Whether the objective is to achieve reduction in drag,increase in thrust,or efficient propulsion an analysis of energetic efficiency is of utmost importance.A successful active or passive drag reduction strategy should not only reduce drag but also decrease the total power consumption (Quadrio,2011).For a given propelling speed an A unified view of energetic efficiency in active drag Aug 01,2013 Fluid drag reduction and efficient self#0183;Whether the objective is to achieve reduction in drag,increase in thrust,or efficient propulsion an analysis of energetic efficiency is of utmost importance.A successful active or passive drag reduction strategy should not only reduce drag but also decrease the total power consumption (Quadrio,2011).For a given propelling speed an

A lubricant-infused slip surface for drag reduction

Sep 15,2020 Fluid drag reduction and efficient self#0183;This slippery lubricant layer contributes to drag reduction by lessening the velocity gradient of the surrounding fluid.The hydrodynamics of the slip surface was examined by scrutinizing the effects of varying the open area and the lid thickness on the slip velocity and length,the dispersion area,and the lubricant consumption.A lubricant-infused slip surface for drag reduction Sep 15,2020 Fluid drag reduction and efficient self#0183;This slippery lubricant layer contributes to drag reduction by lessening the velocity gradient of the surrounding fluid.The hydrodynamics of the slip surface was examined by scrutinizing the effects of varying the open area and the lid thickness on the slip velocity and length,the dispersion area,and the lubricant consumption. Fluid drag reduction and efficient self#181;LASE - CAV Systems Fluid drag reduction and efficient self#181;LASE. Fluid drag reduction and efficient self#181;LASE enables the only HLFC drag reduction system currently deployed on commercial aircraft.The technology can be used to increase efficiencies for business jets to large aircraft types and can save a typical wide body commercial airliner in the region of

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