Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion


The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is

[A]. equal to one
[B]. greater than one
[C]. less than one
[D]. equal to Nusselt number

Answer: Option A


No answer description available for this question.

Sanju said: (Nov 7, 2013)  
(Thermal boundary layer)/(hydrodynamic boundary layer) = (Pr)^1/3.

if Pr=1 then TBL= HBL.

Bharat said: (Mar 8, 2015)  
If pr<1 thermal<hydro.

If pr>1 thermal>hydro.

If pr=1 thermal=hydro Reynolds analogue.

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