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.
Concentration profile problem
Posted 21.11.2023, 07:12 GMT-5 Version 6.1 0 Replies
Please login with a confirmed email address before reporting spam
I have a model of a charged capillary with negative charge on its walls. When calculating the electrolyte flux across is, I reach incorrect concentration profiles outside the capillary, see attached images. This makes the flux and electric current discontinuous.
The physics is Laminar flow + Nernst-Planck-Poisson equation. Volume force within the capillary is
roo_e*dV/dx
where roo_e is the volume charge density. Capillary resides between 0 and 20 µm and aqueous diffusion boundary layers between -20...0 and 20...40 µm.
ConcProfile picture is for the cation (Na+).
Attachments:
Hello Lasse Murtomäki
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.