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How can I get purely advective chemical flow in COMSOL?
Posted 20 juil. 2022, 23:43 UTC−4 Porous Media Flow Version 6.0 0 Replies
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Hi.
I'm trying to make 1D-purely advective chemical flow, whose breakthrough curve should be look like the captured figure I uploaded.
Therefore, in COMSOL, I used Darcy's law, and Transport of Dilutred Species in Porous Media(TDS) nodes. In Darcy's law node, I calculated the groundwater velocity u, and used it for the convective term in TDS node.
To make the system purely advective, I put 0 on the diffusion coefficient value. Constant concentration (1 mol/m^3) was assigned at the left end of the model, and outflow condition was assigned at the right end of the model. Initial condition was 0 mol/m^3 throughout the domain.
Since there is no diffusion, dispersion, reaction, source, and adsorption term, I think the system should be purely advective, but the result was not the same as what I expected.
I uploaded the breakthrough curve I got from the COMSOL. What should be additionally done to make the system purely advective?
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Hello Wonwoo Yoon
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