maddes
posted this
06 September 2018

- Last edited 09 September 2018
In this case I don't have other parts in my geometry.

In the first screenshot you can see that I can apply convection to this hole which reaches a surface temperature of 100 °C after 1 sec. This is working and you can see the results in the screenshot. If I apply convection to other surfaces (for example like the surfaces you can see on my older screenshots) there is an solver-pivot error upcoming and I don't get a result. I changed nothing else. I can apply other loads like radiation or a heat flux to all surfaces. Only convection causes problems. This geometry is an example. I have the same problem for other geometries as well.

You can find the solver settings and boundary conditions in the next two other screenshots. Unfortunately it is in german. The minimum time step is 1e-3 s, the maximum time step is 0,1 s. The heat transfer coefficient of the convection is 100 W/mm2°C and the temperature of the fluid is 100 °C.

In case of a steady-state analysis the body reaches a temperature of 100 °C everywhere. As I'd like to know the temperature distribution after 1 sec I'd like to do the transient analysis.

Thank you for your help.