Mixed Convection

For cases in which multiple heat transfer coefficients are combined, a Mixed Convection value is used.

Example use cases include:

  • Blown Over cooling. The total heat transfer coefficient due to convection is assumed to be a combination of the free and forced convection heat transfer coefficients.
  • Through Ventilated cooling. The total heat transfer coefficient due to convection is assumed to be a combination of the axial and rotational convection heat transfer coefficients.

The formula used is:

h[mixed]3 = h[forced]3 ± h[free]3

With Motor Orientation making the ±:

  • + in assisting and transverse flows
  • - in opposing flows

See Blown Over [Input Data Editor].

[1] Incropera, F.P & DeWitt, D.P.: Introduction to Heat Transfer, Wiley, 1990.