Hi everyone. I’m new in this world. I want to simulate the air inside a bus. The bus will increase its temperature due to the solar radiation through the windows. And the vehicle is refrigereted with a cold air inlet (5cm X 5cm) from top to bottom. These are my questions: What SOLVER should I u…

Hey @sl_pez , To answer your queries, In this case you will have to run a transient analysis to get the results with respect to time. The inlet velocity value can be defined using a table upload . 60 minutes would be a long time to run a transient simulation for. If the mesh is large then the simu…

Hi @sl_pez , Interesting application indeed! To answer your queries, Solver: Any turbulence solver, may be the K-omega SST one Steady state should be sufficient for your application as this is computationally not so expensive Bousinessq approximation off - this is used when quite some density …

Thank you for all the information.:+1:

And why can’t the k-epsilon model be used?Is it better k-omega SST?

@sl_pez sjesu_rajendra: Solver: Any turbulence solver, may be the K-omega SST one Either one of these models can be used. To be more precise you will have to study all the differences between the two to choose the best one for your application. k-omega SST is generally good for wall shear …

I have more questions: If I want to see the evolution of the temperature and velocity through time but also at the end, should I use a steady-state or transient model? I have different simulations. For example, in a case, a change the velocity value. It is 3 m/s from 0 to 30 minutes, then 2 m/s…

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Solar radiation value through bus windows

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sl_pez June 19, 2017, 1:17pm 3

Thank you for all the information.