Menu

Discussion Forum

New Discussion
Filter

Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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.

Geometry swelling and shrinking based on external and interal concentrations

Posted Jun 7, 2012, 7:42 p.m. EDT Chemical Reaction Engineering, Geometry, Modeling Tools & Definitions, Parameters, Variables, & Functions, Structural Mechanics Version 4.2 2 Replies

Alex Vian
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hey, I'm trying to model a human cell shrinking and swell with regards to extracellular and intracellular solute concentration. I've tried using a parametric curve, but it returns unknown variable mod1.c for one of my concentration variables. I've made sure that the variables are defined, but this problem persists. Has anyone else tried this. I'll attach my file to this.

Thank you

Attachments:

2 Replies Last Post Jun 9, 2012, 8:00 p.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Jun 8, 2012, 4:03 a.m. EDT
Hi

you cannot use variables to drive a geometry (at least not in v4.2a) you can only use Parameters and a Parametric sweep solver to modify the geometry.

However you should consider using the Deformed Geometry DG "physics" under Mathematics Deformed mesh
Check your doc, and the model library examples

--
Good luck
Ivar
Hi you cannot use variables to drive a geometry (at least not in v4.2a) you can only use Parameters and a Parametric sweep solver to modify the geometry. However you should consider using the Deformed Geometry DG "physics" under Mathematics Deformed mesh Check your doc, and the model library examples -- Good luck Ivar
Alex Vian
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Jun 9, 2012, 8:00 p.m. EDT
Hey, I have tried the deformed geometry physics, but it does not allow me to chose the boundaries that i want to move. Also, I can't find a deformed geometry physics example in comsol. I you know what it is under i would appreciate it.

The model is attached again this time with as far as i could get with the DG physics
Hey, I have tried the deformed geometry physics, but it does not allow me to chose the boundaries that i want to move. Also, I can't find a deformed geometry physics example in comsol. I you know what it is under i would appreciate it. The model is attached again this time with as far as i could get with the DG physics

Attachments:

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.

Suggested Content