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.

Circular variable dependency detected

Please login with a confirmed email address before reporting spam

Hi
I am finding this error message while solving an evaporation problem.
In my Heat Transfer in Fluid Model, I have added a energy source which is dependent on the saturation pressure and the partial vapor pressure.
My boundary heat source equation is A*B*(ht.psat-ht.xvap*ht.pA)*Lf [W/m^2]
where ht.psat is the saturation pressure
ht.xvap is the vapor mole fraction
and ht.pA is the absolute pressure. All these three variables are in-built comsol variables.
And Lf is the latent heat of evaporation

I have added Transport of Concentrated species to solve the species equation where I put a mass flux that also comes from the expression A*B*(ht.psat-ht.xvap*ht.pA) [kg/s.m^2]

When I try to run the smulation it shows me "Circular variable dependency detected.
- Variable: comp1.ht.omega_moist"
Any idea how to deal with this?


0 Replies Last Post May 5, 2016, 1:36 a.m. EDT
COMSOL Moderator

Hello Sudipta Saha

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.