Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer.

Critical value of the __________ number governs the transition from la

1.	Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer.
A.	Grashoff
B.	Reynolds
C.	both 'a' & 'b'
D.	Prandtl & Grashoff
Answer» E.

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Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer.

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