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Heat Transfer:
Non-Dimensional Parameters
Non-Dimensional Parameters
As is common with fluid mechanics analysis, a
number of dimensionless parameters are employed to describe
convective heat transfer. A summary of these variables is included
in the following tables:
General Convection (Forced
and Free)
Parameter
Formula
Interpretation
Prandtl Number:
Ratio of fluid velocity boundary layer thickness
to the fluid temperature boundary layer thickness.
Nusselt Number:
Ratio of heat transfered from surface to heat
conducted away by fluid.
Forced Convection
Only
Parameter
Formula
Interpretation
Reynolds Number:
Ratio of fluid inertia stress to viscous stress
(for flow over flat plates).
