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-   -   bubbly flow (http://www.cfd-online.com/Forums/fluent/109216-bubbly-flow.html)

Benfa November 12, 2012 15:26

bubbly flow
 
Hello,

I am calculating euler-euler flow (air-bubbles in water tank). I have bubbles with diameter of 50mm while the tank is about 2.5 m in diameter. Someone advised me to use a coarse meash that is abou 100mm x100 mmm as cell cize. I still did not get why?
Now i tried a denser mesh and I observe a significant increase in the "average" rising velocity of aboz factor 2.
Normally I would try an even denser mesh and see if the observed values converge and use this mesh. But how to find a right coarse mesh?

Hopefully some can help me on this discussion.

Thanks in advance!

ahmedhelmy January 30, 2013 06:44

i want some tutorials on modeling bubbly flow in fluent
and thank you


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