mst31 wrote: ↑Sun Sep 18, 2022 6:42 pm
Thank you for work!
But I found mistake in your example: priority of heat equation above than flow equation so first heat equation calculated and then flow equation. But heat equation depends on velocity-field that calculated in flow equation. So temperature in your example is calculated for case without flow.
Many thanks! I intended it correctly but the tooltip was wrong. The equation with the highest priority is calculated first not the other way round. I should have noticed this anyway.
I fixed now the tooltip.
mst31 wrote: ↑Sun Sep 18, 2022 6:42 pm
If I set priority of heat equation to 5 then it doesn't converge.
Then I modified some parameters:
1. Set wall condition for circle object
2. Set solid material for circle object
3. Set computed type of convection for flow and heat equations
4. Set Bubbles to false and Stabilize to true for heat equation
Thanks, 1. is a mistake I should have seen too.
Points 2. and 3. are not necessary.
4. is THE trick. I checked the Elmer manual again and it says that "bubbles" uses stabilization, can only need more computational power. I transferred this info already to our Wiki page:
https://wiki.freecadweb.org/FEM_Equatio ... r_Settings
So apparently Bubbles fails in our case. But according to the Elmer docs Bubbles and no Stabilization are the default. Therefore I cannot change this in our code. I will however, now add a note to the Wiki about this.
What remains is the problem that when I use water instead of air as fluid, there is no convergence. I tried hard but get no setup where water works. Do you?