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August 28, 2023, 02:47 |
How to account for diffusion?
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#1 |
New Member
Ilya
Join Date: Oct 2019
Posts: 16
Rep Power: 7 |
Need a short explanation
what are the enable settings in ansys CFX, take into account diffusion between gases, so that not 2 continuums move, and the mutual deepening of the media was taken into account. An example of a task in the photo. |
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August 28, 2023, 03:27 |
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#2 |
New Member
Ilya
Join Date: Oct 2019
Posts: 16
Rep Power: 7 |
I send the supplemented scheme in English
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August 28, 2023, 03:29 |
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#3 |
New Member
Ilya
Join Date: Oct 2019
Posts: 16
Rep Power: 7 |
Sorry, the picture is rotated vertically again
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August 28, 2023, 05:41 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,871
Rep Power: 144 |
I assume the CH4 and air are a gas. In this case this looks like a multicomponent mixture model. You set up a gas mixture of CH4 and air as a variable composition material and use this as the fluid for the domain. You have to define mass fractions at the inlets and a diffusion coefficient. I think this covers all the physics you need.
Note that gravity will not have any effect on the mixture composition, in other words the air and CH4 will not separate due to gravity. The mixture can rise due to buoyancy, but not separate.
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Tags |
cfx, diffusion |
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