To achieve that, consider the ratio of heat source to heat capacity multiply by the difference between the fluid's temperature and free stream temperature.

To achieve that, consider the ratio of heat source to heat capacity multiply by the difference between the fluid's temperature and free stream temperature.

Dear Isaac, is there any source for UDF that can be used for this? I need to define a User Defined Function

Hey Hakan,

It seems from the term "UDF" that you are using either Fluent or Ansys. I am not sure though how to do it in them using UDF, but I remember you can add a "constant" source term ( e.g. heat source ) to the fluid after checking the energy equation option in Fluent ( Double click on your fluid region snd then add source, similar to what you do for a solid ). A general search on Google gave me the following as well:

https://www.cfd-online.com/Forums/fluent/75767-heat-generation-inside-fluid.html

https://www.cfd-online.com/Forums/fluent/82986-heat-generation-fluid.html