Engineering Board Exam Reviewer · Fluid Mechanics · easy

The thin layer near a solid surface where viscous effects are significant is called the:

1. Boundary layer
2. Free shear layer
3. Vena contracta
4. Hydraulic jump

Answer

A. Boundary layer

Solution

Prandtl's boundary-layer concept: outside it the flow is nearly inviscid.

More Fluid Mechanics questions

1. The discharge over a rectangular weir is proportional to:
2. The discharge over a 90° V-notch (triangular) weir is proportional to:
3. A weir is used to:
4. Open channel flow with a Froude number greater than 1 is called:
5. A sudden rise in water surface when supercritical flow changes to subcritical flow is called a:
6. The hydraulic radius of a channel is defined as:
7. Manning's formula is used for:
8. The Hazen–Williams formula is commonly used for:
9. For pipes connected in parallel:
10. Losses in pipe fittings, valves, bends and sudden changes in cross section are called:

All Fluid Mechanics Reviewer questions