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Kitchen Ventilation Ansys Simulation.

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Old   March 27, 2021, 00:37
Question Kitchen Ventilation Ansys Simulation.
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Hi guys, hoping anyone can help me with my simulation because I am stuck at this part for weeks now.

I'm doing a research on kitchen ventilation with only involve air and carbon dioxide, CO2. There is three inlets for air and stoves (inlet) for CO2. There is only one outlet. The inlets are given with mass flow while the outlet is pressure outlet. I experimented using species transport model and Mutliphase (mixture) but still didn't get the results that I desire.

For some reason, after I include co2, the hot air does not rise but sinks down into the room. I tried with only air, the results were better than the involvement of co2. The file attached is the temperature contour for with and without co2. Please help me.
Attached Images
File Type: png With CO2.PNG (51.8 KB, 4 views)
File Type: png With Co2 (2).PNG (60.7 KB, 2 views)
File Type: png only air.PNG (21.3 KB, 2 views)
File Type: png only air (2).PNG (28.1 KB, 2 views)
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