Answer to Question #227675 in Chemical Engineering for Lokika

Question #227675

For the Prandtl (Pr) number greater than unity, the thermal boundary layer is-___(thinner than/thicker than/same as) the hydrodynamic boundary layer?


1
Expert's answer
2021-08-23T04:51:11-0400

In case of water and oils Pr number is greater than 1. For liquid metals and air, Pr number is less than 1, hence thermal boundary layer thickness will be more than the hydrodynamic boundary layer thickness


The answer is thicker.


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