Reply To: Heat transfer at inlets

[sjyang]

Hi, Thank you sincerely for the detailed explanation:)

(https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v201/en/flu_ug/flu_ug_sec_hxfer_report.html%23x1-110100014.4.1)

 

However, as per the above manual, I understand that by using the 'Surface Integrals', choosing 'Flow Rate' for the 'Report Type', and selecting 'Enthalpy' (under the Temperature category), the convective heat flux can be calculated.

In the attached image below, I have listed the values for the Total Heat Transfer Rate calculated in the Fluxes section and the Enthalpy Flow Rate calculated in the Surface Integrals section at the inlet and outlet. If you look at the values in detail, the outlet shows that the heat transfer rate and the enthalpy flow rate (convective heat flux) are the same. However, at the inlet, these two values differ.

I understood that the heat flux at the outlet only accounts for convective heat flux, which is why the two values are the same, whereas at the inlet, both convection and diffusion are accounted for, resulting in different values for the Total Heat Transfer Rate and Enthalpy Flow Rate (convective heat flux). Could you point out where I might have misunderstood?