Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Need some advice for push-pull sampling probe simulation

Please login with a confirmed email address before reporting spam

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.


0 Replies Last Post 16.09.2021, 15:58 GMT-4
COMSOL Moderator

Hello Thomas White

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.