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Stationary laminar flow driven by buoyancy, in bigger scale.
Posted 2024年6月17日 GMT-4 07:45 Fluid & Heat Version 6.0 0 Replies
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Hello everyone!
I have problems with buoyancy stimulations. I downlaod the case file named "buoyancy_air.mph" from COMSOL Blog. In this case, there is just a cube box whose length is 0.1m, 2 opposite temperature boundaries to transfer heat, left boundaries are insulation, and fixed by air. Suerly, it works well.
But the problems came after I changed the length to 0.5m, then it couldn't converge. Finer mesh, other bigger scales failed too. The warning pop-up message said it reached maximum number of iterations.
I guess there is somthing wrong if I keep the same settings when the scale is becoming bigger. However, I didn't find the key. This question has puzzled me for weeks, just like a ghost in quantum state. I want to underatand it to simulate buoyancy in architecture, which needs a big scale.
The source file and introductions is at "https://www.comsol.com/model/buoyancy-flow-in-air-53441".
Thank you if you have some advices. I will be apperciated if you are interest to have a try follow the above steps.
Hello Jiang Mingrui
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