Menu

Discussion Forum

New Discussion
Filtern

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.

Failed to evaluate Jacobian of expression./Undefined variable.

Posted 12.04.2018, 08:27 GMT-4 Structural & Acoustics, Fluid & Heat, Computational Fluid Dynamics (CFD) Version 5.3 1 Reply

GAUTAM GAUTAM
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

I have created a tube in tube geomtry for adsorption of gases. This is error I'm getting after computation. Can anyone help in this?

Undefined variable. - Variable: comp1.mat2.def.pA - Geometry: geom1 - Domain: 3 Failed to evaluate Jacobian of expression. - Expression: d((comp1.ht.hs1.Qtest(comp1.T)comp1.ht.d)(dvol_spatial),{test@3}) Failed to evaluate Jacobian of expression. - Expression: (comp1.ht.hs1.Qtest(comp1.T)comp1.ht.d)(dvol_spatial)

1 Reply Last Post 12.04.2018, 17:51 GMT-4
Sohan Birla
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 7 years ago 12.04.2018, 17:51 GMT-4

It shows that density of gas is pressure dependent and it does not find the pressure in the domain. Make sure you have fluid domain

It shows that density of gas is pressure dependent and it does not find the pressure in the domain. Make sure you have fluid domain

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