Dear Simulation CFD experts,
I am solving a conjugate heat transfer case. This is an enclosure with 2 openings. There are a couple of fans inside the enclosure. And I am using fan curves for these fans. Each fan also generate 100 watts heat.
So, I ran the flow only steady state calculations. I did reduce the relaxation factor to 0.1 for v and ran 600 iteration steps. Flow solution does not look too bad. Then, I turned of flow and turned on heat transfer. And changed the case to transient. The temperature field looked fine up to time = 3000 seconds, then, the temperature field quickly diverged.
I am wondering anyone here has any suggestion on something like this.
For the 2 openings, I set pressure to gauge 0. I am not too sure how to set the BC for temperature. Ideally, I should have a big air volume that have the enclosure inside. But, just want to get a quick feel of the performance.