[stevebn]

Hello, I am simulating the heating behavior of the fluid in the rod beam channel, using the fluid-solid conjugate heating method, setting a given volume heat source in the solid domain, using the standard kw model in the fluid domain, and using a coupled solver before solving the energy equation. The solution diverges, so I choose a split solver, but what is the reason for the residuals of the energy equations not going down during the simulation?

[fluid23]

That is usually an indication that your boundary conditions are not well posed.

[stevebn]

Originally Posted by fluid23

That is usually an indication that your boundary conditions are not well posed.

First of all thanks for your reply, yes I found it, the volume heat flow is set too large