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In the boundary layer, the flow is:
- a)Viscous and rotational
- b)Inviscid and irrotational
- c)Inviscid and rotational
- d)Viscous and irrotational
Correct answer is option 'A'. Can you explain this answer?
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In the boundary layer, the flow is:a)Viscous and rotationalb)Inviscid ...
Ans. (a)
Most Upvoted Answer
In the boundary layer, the flow is:a)Viscous and rotationalb)Inviscid ...
Explanation:
The boundary layer is the thin layer of fluid that forms on the surface of a solid object in contact with a fluid. The flow in the boundary layer is characterized by several properties, including viscosity and rotational forces.
Viscosity:
Viscosity is the property of a fluid that resists its motion due to internal friction. In the boundary layer, the fluid in contact with the solid surface experiences a zero velocity at the boundary, which causes the fluid to stick to the surface. This creates a shear stress in the fluid, which is proportional to the viscosity of the fluid.
Rotational forces:
Rotational forces refer to the tendency of the fluid to rotate or spin around an axis. In the boundary layer, these forces arise due to the difference in velocity between the fluid in contact with the surface and the fluid outside the boundary layer. This difference in velocity creates a velocity gradient, which results in a tangential stress in the fluid.
Conclusion:
Therefore, the correct answer is option 'A' - viscous and rotational. The flow in the boundary layer is viscous due to the presence of shear stress, and rotational due to the presence of tangential stress.
The boundary layer is the thin layer of fluid that forms on the surface of a solid object in contact with a fluid. The flow in the boundary layer is characterized by several properties, including viscosity and rotational forces.
Viscosity:
Viscosity is the property of a fluid that resists its motion due to internal friction. In the boundary layer, the fluid in contact with the solid surface experiences a zero velocity at the boundary, which causes the fluid to stick to the surface. This creates a shear stress in the fluid, which is proportional to the viscosity of the fluid.
Rotational forces:
Rotational forces refer to the tendency of the fluid to rotate or spin around an axis. In the boundary layer, these forces arise due to the difference in velocity between the fluid in contact with the surface and the fluid outside the boundary layer. This difference in velocity creates a velocity gradient, which results in a tangential stress in the fluid.
Conclusion:
Therefore, the correct answer is option 'A' - viscous and rotational. The flow in the boundary layer is viscous due to the presence of shear stress, and rotational due to the presence of tangential stress.
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In the boundary layer, the flow is:a)Viscous and rotationalb)Inviscid and irrotationalc)Inviscid and rotationald)Viscous and irrotationalCorrect answer is option 'A'. Can you explain this answer?
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