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.
Mixing of two fluids at different temperatures
Posted 2015年3月25日 GMT-4 13:00 Computational Fluid Dynamics (CFD) 0 Replies
Please login with a confirmed email address before reporting spam
This is the scenario that I am attempting to capture:
You have a box with a divider in the middle. On one side is water at one temperature. On the other side is water at a different temperature. At time zero, you quickly raise the divider so that the fluids are able to mix. I have set this up by using an initial condition for the temperature that includes a step function at the location of the divider.
However, I always get the error: Failed to find consistent initial values. Last time step is not converged.
I assume this is because the initial conditions are not physically possible, perhaps because I left the initial pressures at 0.
I have attached my file. Please note that this is supposed to mimic a microfluidic device, so the length scale is very small (centimetres).
Hello Adam Mepham
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.