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 The information provided may be out of date.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.

Last time step is not converged

Please login with a confirmed email address before reporting spam

Hallo sir,

hi have a question. when i simulate i have forever this Picture.

Nonlinear solver did not converge.
Failed to evaluate variable.
Variable: mod1.fpt.mu local, Geometry: Particles
Failed to evaluate variable.
Variable: mod1.fpt.mu, Defined as: mod1.fpt.mu local
Failed to evaluate variable.
Variable: mod1.fpt.taup, Defined as: ((mod1.fpt.rhop*(mod1.fpt.dp^2))/(18*mod1.fpt.mu))
Failed to evaluate variable.
Variable: mod1.fpt.Ftx, Defined as: (((mod1.fpt.domvar df1*((mod1.u-mod1.fpt.vx)*mod1.fpt.mp))/mod1.fpt.taup)-(((mod1.fpt.Z*e const)*d(mod1.V,x))*mod1.fpt.domvar ef1))
Failed to evaluate expression.
Expression: d((test(mod1.qx)*(-mod1.qxtt+(mod1.fpt.Ftx-d(mod1.qx,t)*d(mod1.fpt.mp,t))/mod1.fpt.mp))*(1),{test1})
Time : 0.03255101414078437
Last time step is not converged.

how can i resolt it.

thank's

0 Replies Last Post Aug 4, 2015, 5:54 a.m. EDT
COMSOL Moderator

Hello Esai Fotso Tagah

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.

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.