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Phase Change in Small 2-D Pores
Posted 27 juil. 2017, 15:21 UTC−4 Fluid & Heat, Heat Transfer & Phase Change, Structural Mechanics Version 5.3 0 Replies
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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)
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Hello Albert Roflingson
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