Indicate the correct statement about the effect of Reynolds number on the character of the flow over an object.
A. If Reynolds number increases the size of the region around the object that is affected by viscosity increases.
B. If Reynolds number is high enough the effect of viscosity is negligible and the fluid flows over the plate without sticking to the surface.
C. If Reynolds number is low enough the effect of viscosity is so high that there is a region near the plate where the fluid is stationary.
D. If Reynolds number increases the extent of the region around the object that is affected by viscosity decreases.

Question

08-05-2020
Engineering

contestada

Indicate the correct statement about the effect of Reynolds number on the character of the flow over an object.
A. If Reynolds number increases the size of the region around the object that is affected by viscosity increases.
B. If Reynolds number is high enough the effect of viscosity is negligible and the fluid flows over the plate without sticking to the surface.
C. If Reynolds number is low enough the effect of viscosity is so high that there is a region near the plate where the fluid is stationary.
D. If Reynolds number increases the extent of the region around the object that is affected by viscosity decreases.

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tochinwachukwu33 tochinwachukwu33 · Answer 1 · 2020-05-12T03:29:31+02:00

Answer:

Option C

If Reynolds number is low enough the effect of viscosity is so high that there is a region near the plate where the fluid is stationary.

Explanation:

The Reynolds number is a measure of how developed a flow is. It helps us indicate whether a flow is turbulent, intermediate or laminar.

If the Reynolds number of a flow is too low, it means that the flow is laminar. A major characteristic of laminar flow is that it occurs in layers, with the layer closest to the plate, having a a velocity of zero, and the layer farthest from the plate, having a maximum velocity. This means that for laminar flows, the viscosity effects are so much that there is a stationary region at the fluid-plate boundary layer.