Q.

The Prandtl Number approximates

A. momentum diffusivity to thermal diffusivity
B. thermal diffusivity to momentum diffusivity
C. shear stress to thermal diffusivity
D. thermal diffusivity to kinematic viscosity
Answer» A. momentum diffusivity to thermal diffusivity
Explanation: the prandtl number is a dimensionless number. it approximates the ratio of momentum diffusivity to thermal diffusivity. it can be expressed as pr = v/ α(1). where α= thermal diffusivity and v= momentum diffusivity.
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