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.
Deffinition of variables
Posted 23.04.2014, 12:32 GMT-4 0 Replies
Please login with a confirmed email address before reporting spam
Hope you are going well.
Actually I decide to define velocity in the spherical coordinates. After selection this coordinate from definition section, I createt two equations for velocity in r and theta directions in variable section as:
Vr= (0.06*(1-1.5*(0.001/r)+0.5*((0.001/r)^3))*cos(theta))*(r>0.001)
Vtheta= (0.06*(-1+0.75*(0.001/r)+0.25*((0.001/r)^3))*sin(theta))*(r>0.001)
After that in "Transport Diluted species" in subsection "Convection and Diffusion", I selected spherical coordinate system and add Vr and Vtheta as velocities in r and theta directions.
However after running, the below error showed:
Failed to evaluate variable Jacobian.
- Variable: Vtheta
- Geometry: 1
- Domain: 1
I don`t know what I have to do?
I will be thankful if you help me.
Thanks a lot.
Hello Mohammad Jaber Darabi Mahboub
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.