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August 30, 2018, 07:07 |
steady vs transient fluid flow behaviour
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#1 |
New Member
Vkt
Join Date: Aug 2018
Posts: 3
Rep Power: 8 |
I am doing my project on odor source localization. I am doing the simulation using ansys fluent 19.1 software to understand the behavior of CO2 gas.
1st I performed simulation in steady state and then in the transient state. but I am not able to understand the reason why flow behavior in both cases is different. I want to understand it mathematically. I am attaching the images of both. |
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August 30, 2018, 22:00 |
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#2 |
Senior Member
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The flow in transient simulation might be not well established. The height of your domain is estimated as 40m, and the upward convection velocity is about 4m/s, which result in a flow pass through time to be 10s. You need to simulate for more than 10s. Another question is, why do not you start transient analysis based on the fields from steady analysis? Note that if you are able to obtain a converged result from steady analysis and it is physically sounding, there is no need to do a transient simulation.
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August 31, 2018, 11:46 |
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#3 | |
New Member
Vkt
Join Date: Aug 2018
Posts: 3
Rep Power: 8 |
Quote:
so I want to know am I going in the right direction? |
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Tags |
ansys fluent 19.1, cfd, odor source localization |
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