Hi there,
I am new in this software and would really appreciate some guidance.
I want to simulate the natural convection inside a solar chimney using the boundary conditions 'Heat Flux'.
What I did was to draw the solar chimney model, enclosed by glass, with zinc at the bottom end and PVC at the top end. At the two ends, there is a 10 cm circular hole for the air to go in and go out.
The boundary conditions that I applied was heat flux (800 W/m^2) at the four sides of the chimney, pressure of 0 at both inlet and outlet, and a temperature BC of 35C at the inlet, to indicate an intake of air at 35C.
I feel like I'm lacking of some BCs as my results show an unusually high temperature. What should I do?
By the way, I ticked flow, heat transfer and radiation to be on. There's also a gravity and variable air.
Picture attached shows the model figure.
Thanks.
Apolo, thank you for your guidance.
After taking into consideration on the guidance given by Apolo,
I tried running the simulation.
But the velocity results I get seems very weird as attached.
Why is this happening, although all the BCs are equally placed at four sides?
There are methods of representing radiation through the glass, for the time being its ok to keep it as is
The velocity profile is a function of your mesh. you will need to refine the mesh to capture that more effectively.