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Need some advice for push-pull sampling probe simulation
Posted Sep 16, 2021, 3:58 p.m. EDT Fluid & Heat, General, Computational Fluid Dynamics (CFD) Version 5.6 0 Replies
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Hello,
I am trying to resolve an issue with my simulations. They are meant to replicate a push-pull sampling probe immersed in a stirred solution. The intent is to duplicate recovery results in the simulations based on experimental data. They are fairly simple 2-D simulations, laminar flow being coupled to transport of diluted species. For free solution, we use dopamine and glutamate. Dopamine has a diffusion coefficient of 7.5 e-10 m^2/s and glutamate has a coefficient value of 8.6 e-10 m^2/s. The sampling probes are made from silicon via microfabrication techniques.
In experimental results, dopamine typically yields a recovery of 9% lower than glutamate, at least. However, the simulations show the recoveries as being the same due to their difffusion coefficients being being so close. That tells me something else is at play here. Does anyone here have any suggestions? I hope that I am just missing something that is easy to correct.
Thank you for any help you can provide.
Hello Thomas White
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