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Flow in a bubble column reactor

Posted 23 juin 2011, 14:20 UTC−4 Fluid & Heat, Computational Fluid Dynamics (CFD), Chemical Reaction Engineering, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.2 2 Replies

Nicholas Kennedy
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Curious... Has anybody tried running this model? I am trying to build a modified 2D bubble column reactor based off of this model but I can't seem to get the COMSOL model to run. Using the models parameters and computing a time-step with the laminar bubbly flow model for 20 seconds is fine. I can get that to run, but then the instructions state to perform a stationary study for determining the time-averaged velocity field and volume fractions for introducing turbulence into the model. So, I turn on the K-E turbulence model and run a new stationary study but it fails to converge every time. I am wondering if I am missing a step or doing something wrong. I have been dealing with this problem for three weeks now and can not figure out the problem. Please help! This road block is holding me back from including mass transfer and then the transport of diluted species into this model and if I can't get the model made by COMSOL to run, there is no way I will be able to build my own model. Any help would be great.

Thanks,

Nick
2 Replies Last Post 2 juil. 2012, 17:32 UTC−4
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Hello Nicholas Kennedy

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Shadi Saeed
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Posted: 1 decade ago 24 mai 2012, 14:47 UTC−4
Hey,

I'm Running into the same problem. have you figured out how to solve it. If yes could you please tell me what you did.

Thanks.
Hey, I'm Running into the same problem. have you figured out how to solve it. If yes could you please tell me what you did. Thanks.
Nicholas Kennedy
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Posted: 1 decade ago 2 juil. 2012, 17:32 UTC−4
I upgraded to comsol 4.3 and it works. Check out the model Flow in an airlift loop reactor, instead of the flow in a bubble column reactor. That model is old and out of date. Hope that helps!
I upgraded to comsol 4.3 and it works. Check out the model Flow in an airlift loop reactor, instead of the flow in a bubble column reactor. That model is old and out of date. Hope that helps!

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