Is it possible to use the temperature calculated from a surface goal of an outlet boundary as the fluid temperature of an inlet boundary? I am trying to simulate a coolant line that is a closed system. as the temperature increases throughout the system, the inlet temperature needs to be the same as the outlet temperature. For context, I have a subdomain where there is a separation due to a lid. On one face of the lid I have the outlet boundary and the other side has the inlet boundary. Any help would be muchly appreciated.

Hi,

Yes it's possible but a bit tricky for the temperature. Follow the steps :

- Create the Surface Goal associated with the Outlet Temperature

- Create a parameter equals to the previous Surface Goal :

Tools > Flow Simulation > Project > Parameters

Under "Value" of the table, click on the "..."

Choose "Definition of formula" (or equivalent, it's the third choice from the end) for the "Dependency type"

Choose the goal you've created next to "goal" and click on the button to insert it in the formula

- Once you've created this parameter, you can specify the dependency of the temperature by clicking on the "fx", when you create your inlet boundary condition

- Then choose "Definition of formula", and choose "Parameter 1" (or whatever you've called it) and insert it on the formula

Same if it's another type of inlet boundary condition.

That's it. Hope it's clear.