Physics · Fluid Mechanics
The hydrodynamic boundary layer thickness is defined as the distance from the surface where the fluid velocity equals:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 199% of the momentum of the free stream
- 2the approach velocity
- 399% of the local external free stream velocity✓
- 4the local external free stream velocity
Correct answer
99% of the local external free stream velocity
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