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.
Phase Change in Small 2-D Pores
Posted 27.07.2017, 15:21 GMT-4 Fluid & Heat, Heat Transfer & Phase Change, Structural Mechanics Version 5.3 0 Replies
Please login with a confirmed email address before reporting spam
I am a newbie in COMSOL, built a 2-D model consist of a few small pores (d=1 mm) in a piece of mortar material. The pores are filled with water, which has a phase change to ice.
(www.comsol.com/model/phase-change-474)
I defined Heat & Mass Fransfer and set a B.C. for Heat Transfer, linearly varying from +15 to -15 in 14400 sec, expecting that water-ice transition put some pressure on pore walls.
Here is the error and .mph file attached.
Thanks a lot for any kind of help !
Undefined variable.
- Variable: comp1.ham1.T
- Geometry: geom1
- Domains: 2-8
Failed to evaluate Jacobian of expression.
- Expression: dvol_spatial*(comp1.mt.d*(((comp1.mt.Dw*comp1.mt.ksi)+(comp1.mt.delta_p*comp1.mt.psat))*(-comp1.mt.phiy)))
Failed to evaluate Jacobian of expression.
- Expression: ((comp1.mt.Dw*comp1.mt.ksi+comp1.mt.delta_p*comp1.mt.psat)*(-comp1.mt.phix*test(comp1.mt.phix)-comp1.mt.phiy*test(comp1.mt.phiy))*comp1.mt.d)*(dvol_spatial)
Attachments:
Hello Albert Roflingson
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.