Question
Which of the following non-dimensional terms is an estimate of Nusselt number?
Options :
Which of the following non-dimensional terms is an estimate of Nusselt number?
Which of the following non-dimensional terms is an estimate of Nusselt number?
Which of the following non-dimensional terms is an estimate of Nusselt number?
Non-dimensional velocity gradient multiplied by Prandtl number
Answer :
Which of the following non-dimensional terms is an estimate of Nusselt number?
Solution :
It is the ratio of heat flow rate by convection process to the heat flow rate by conduction process.
It is also equal to the dimensionless temperature gradient at the surface, and it provides a measure of the convection heat transfer occurring at the surface.
Nu =
Heat flow in convection, Qconv = hA ΔT
Heat flow in conduction, Qcond =
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