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Questions and Answers
What is the difference in skin friction between turbulent and laminar boundary layer flow?
What is the difference in skin friction between turbulent and laminar boundary layer flow?
- Laminar skin friction is about one-third that for turbulent flow (correct)
- Turbulent skin friction is twice that for laminar flow
- Turbulent skin friction is about one-third that for laminar flow
- Laminar skin friction is twice that for turbulent flow
What is a characteristic of the turbulent boundary layer's velocity profile?
What is a characteristic of the turbulent boundary layer's velocity profile?
- It has a lower local velocities immediately adjacent to the surface
- It has a less rapid change of velocity with distance above the surface
- It has a lower kinetic energy in the airflow next to the surface
- It has a fuller velocity profile and higher local velocities adjacent to the surface (correct)
What is the relationship between shearing stress and velocity gradient in the laminar boundary layer?
What is the relationship between shearing stress and velocity gradient in the laminar boundary layer?
- The lower velocity gradient of the laminar boundary layer corresponds to higher shearing stress
- The higher velocity gradient of the laminar boundary layer corresponds to lower shearing stress
- The higher velocity gradient of the laminar boundary layer corresponds to higher shearing stress
- The lower velocity gradient of the laminar boundary layer corresponds to lower shearing stress (correct)
What is the nature of the transition to turbulent boundary layer flow?
What is the nature of the transition to turbulent boundary layer flow?
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