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The friction drag is caused by
- a)separation of boundary layer
- b)pressure distribution over the body surface
- c)shear stress generated due to viscous action
- d)all of the above
Correct answer is option 'D'. Can you explain this answer?
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The friction drag is caused bya)separation of boundary layerb)pressure...
Friction Drag in Fluid Mechanics
Friction drag is a type of drag that is caused by the interaction between a fluid and a solid surface. It is an important concept in fluid mechanics, particularly in aerodynamics and hydrodynamics. The friction drag is caused by the following factors:
Separation of Boundary Layer
Boundary layer separation occurs when the flow of fluid over a surface becomes turbulent, causing the boundary layer to separate from the surface. This separation creates a region of low pressure behind the body, which generates drag.
Pressure Distribution Over the Body Surface
The pressure distribution over the body surface is another factor that contributes to friction drag. As the fluid flows over the surface, it exerts a force on the body, creating a pressure distribution. If the pressure is not uniform, it can create areas of high and low pressure, which can generate drag.
Shear Stress Generated Due to Viscous Action
Viscous forces are generated due to the interaction between the fluid and the solid surface. These forces create a shear stress along the surface, which can lead to drag. The magnitude of the shear stress depends on the viscosity of the fluid, the velocity of the flow, and the roughness of the surface.
All of the Above
Friction drag is caused by a combination of these factors. The interaction between the fluid and the solid surface creates a complex flow pattern, which can lead to the generation of drag. Therefore, the correct answer is option 'D' - all of the above.
Friction drag is a type of drag that is caused by the interaction between a fluid and a solid surface. It is an important concept in fluid mechanics, particularly in aerodynamics and hydrodynamics. The friction drag is caused by the following factors:
Separation of Boundary Layer
Boundary layer separation occurs when the flow of fluid over a surface becomes turbulent, causing the boundary layer to separate from the surface. This separation creates a region of low pressure behind the body, which generates drag.
Pressure Distribution Over the Body Surface
The pressure distribution over the body surface is another factor that contributes to friction drag. As the fluid flows over the surface, it exerts a force on the body, creating a pressure distribution. If the pressure is not uniform, it can create areas of high and low pressure, which can generate drag.
Shear Stress Generated Due to Viscous Action
Viscous forces are generated due to the interaction between the fluid and the solid surface. These forces create a shear stress along the surface, which can lead to drag. The magnitude of the shear stress depends on the viscosity of the fluid, the velocity of the flow, and the roughness of the surface.
All of the Above
Friction drag is caused by a combination of these factors. The interaction between the fluid and the solid surface creates a complex flow pattern, which can lead to the generation of drag. Therefore, the correct answer is option 'D' - all of the above.
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The friction drag is caused bya)separation of boundary layerb)pressure distribution over the body surfacec)shear stress generated due to viscous actiond)all of the aboveCorrect answer is option 'D'. Can you explain this answer?
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