Discovery AIM – Calculating Heat Transfer Coefficient (HTC)

In Discovery AIM, there is no inbuilt variable for calculating Heat Transfer Coefficient (HTC). However, you can create an expression for calculating this variable.

The following expression can be used to get the Average Heat Transfer Coefficient (HTC) value:

Average(SurfaceHeatFlux,GetSelectionSet(“@int1″),”Area”)/(Average(Temperature, GetSelectionSet(“@int1″),”Area”) – 298*1[K])

For this to work, it is required to first create a selection set comprising of the surfaces where HTC is to be calculated. In this example, the selection set is named as “int1”.

Non averaged results can be plotted using contour plot and using the expression “abs(SurfaceHeatFlux/(Temperature – 273 [K]))”. You can replace 273 by the reference temperature you have.

This can be easily exported to CSV using the option located at the top right corner of the contour panel. This exported CSV file will contain results at node value.