Hi all!
I would like to ask for your help in order to enlighten me on a thermal simulation under Solidworks Flow Simulation using thermal radiation.
The device looks like this: I have a box with two opposite sides open. On one side an inlet boundary condition requires an airflow of 19°C, and on the other side an outlet boundary condition imposes an atmospheric pressure and temperature of 19°C. The walls of the box are ideal and do not radiate.
In this box is placed a thermostatic tap supplied with hot water. To put it simply, I have a 70°C heat source that is in contact with my assembly which measures a hundred mm. I want to measure the temperature at different points in this assembly.
When I don't activate any radiant surface, the results I get are the same as when I don't have the "radiation" option activated in the general settings so only conduction and convection, so far so good. My problem starts when I activate the radiant surfaces of my assembly, which is when I get negative temperature values at the level of the parts that emit radiation when the minimum temperature of the simulation should be air at 19°C.
I haven't been able to solve this problem so far, so if anyone has an idea about the origin of the problem they would be of great help. Thanks in advance!
Hervé KANNENGIESSER