The hydrodynamic and thermal boundary layers will merge, when ____________________?
Correct answer: A. Prandtl number is one
- A. Prandtl number is one
- B. Schmidt number tends to infinity
- C. Nusselt number tends to infinity
- D. Archimedes number is greater than 10000
Explanation
When Prandtl number is one, momentum diffusivity and thermal diffusivity are equal. Consequently, the velocity and temperature profiles have the same development, so the hydrodynamic and thermal boundary layers coincide.
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