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How do I model two different fluids in one domain?
Posted Feb 15, 2013, 10:45 a.m. EST 3 Replies
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I am new to COMSOL, and am trying to model a microfluidic device that has two fluids, each with a different conductivity. I tried building a geometry with two domains that are a union with an interior boundary. But of course the two fluids then can not interact. I tried a geometry with one domain (a union without an interior boundary) but then I can only use one material for the entire domain. I would like these fluids to be able to diffuse together and be influenced by the same electric field. Does anyone have any suggestions?
Thanks,
Anne
Hello Anne Regel
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The short answer is you can't. Each domain can only be one material. However, you can use make one structure with multiple domains, or you can flow a new material into a domain. I suggest you look at some of the COMSOL microfluidic models. The micromixer model that COMSOL has multiple fluids flowing into one central channel, each fluid can have different properties and the central channel shows the mixing of the separate flows.
- Anne
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