3. Transition from laminar to turbulent flow in a natural convection on vertical plates occurs when the product of the Prandtl number and the Grashof number equals approximately
A. 10?
B. 10?
C. 2100
D. 4000
3. Transition from laminar to turbulent flow in a natural convection on vertical plates occurs when the product of the Prandtl number and the Grashof number equals approximately
A. 10?
B. 10?
C. 2100
D. 4000