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Boundary layer theory examines the effects of a boundary layer in fluid flow over surfaces. The displacement, momentum, and energy thicknesses are defined in terms of the velocity profiles of the fluid and their influence on momentum flux. The chapter also presents practical problems for calculating these thicknesses based on given velocity distributions.
Chapter 325 sections
Boundary layer theory examines the effects of a boundary layer in fluid flow over surfaces. The displacement, momentum, and energy thicknesses are defined in terms of the velocity profiles of the fluid and their influence on momentum flux. The chapter also presents practical problems for calculating these thicknesses based on given velocity distributions.
Displacement thickness is the distance a streamline is displaced away from the wall.
Momentum thickness quantifies the loss of momentum flux in the boundary layer.
Energy thickness reflects the reduction of kinetic energy in the fluid flow due to velocity deficit.
The distance by which a streamline just outside the boundary layer is displaced from the wall due to viscous effects.
A measure of the loss of momentum flux in the boundary layer compared to the potential flow.
A thickness that measures the reduction of kinetic energy in the fluid flowing due to the velocity deficit.
The thin region adjacent to a solid boundary where the effects of viscosity are significant in comparison to inertial forces.
Total Questions
2
Estimated Time
4 min
Passing Score
70%
1 more question available