I first created an oil bath with two inlets and one outlets. I was able to assign the oil using “internal volume” function in geometry edit.
Then i went ahead to model a whole environment for the oil bath as i assumed natural convection should help in cooling the external surfaces of the oil bath. So i assigned an “external volume” in this regard.
I want to know whether the results i got is a true representation of the right thing i have done as i see some extreme temperatures I am not so convinced they might be true. Also, one of the inlets seem not to work so I have a local hotspot. I want to know what went wrong there and how to correct that.
please find attached link to the work.
Oil bath 2 | SimScale Workbench
Hi @Owura, thanks for posting on the forum and welcome to the SimScale Community 
Since your project is not shared with support, unfortunately we can’t pinpoint what the exact issue is - take a look here to know how to share your project. However, from your description, this does sound like a divergence issue, in which case these resources might be helpful:
- How to Check Convergence of a CFD Simulation? | SimScale
- Divergence in Simulation: How to Tell When and Where? | SimScale
- How to Check and Improve Mesh Quality | SimScale
I also often see these “extreme temperatures” appearing when there’s no channel for the heat to flow - for instance, if the domain’s walls are defined as “adiabatic”.
Hope this helps!
Cheers
Igor
Right. I have shared the project with support now.
Hi @Owura, thanks for sharing
Looking at the convergence plots/area average, the issue seems to be the convergence of your simulation indeed:
Please refer to these pages:
2 additional comments:
- Make sure the power source values are correct.
- Since your simulation is compressible and very sensitive to small variations in the density field, try setting it’s relaxation factor to 0.1:
Cheers