Hi,
I'm getting this error when running a time dependent simulation of laminar flow in a micro channel. What I want to do is change the input flow on one arm of a y-channel and follow the response in time. Anyway it's this error:
Repeated error test failures. May have reached a singularity.
Time : 0
Last time step is not converged.
Now I've seen people with similar problems where it is due to too large a change in the time dependent parameter but I don't see how this is the case here. I am simulating for t=0 with the stationary solver first which is giving the correct result and at t=0 for the time dependent solver the boundary conditions should be exactly the same. I've tried several different time steps and different arrangements for the step function I'm using to change the flow. If it failed as the flow changed I'd think there was a point to the error but this doesn't make sense to me. Anyone have any ideas?
I'm getting this error when running a time dependent simulation of laminar flow in a micro channel. What I want to do is change the input flow on one arm of a y-channel and follow the response in time. Anyway it's this error:
Repeated error test failures. May have reached a singularity.
Time : 0
Last time step is not converged.
Now I've seen people with similar problems where it is due to too large a change in the time dependent parameter but I don't see how this is the case here. I am simulating for t=0 with the stationary solver first which is giving the correct result and at t=0 for the time dependent solver the boundary conditions should be exactly the same. I've tried several different time steps and different arrangements for the step function I'm using to change the flow. If it failed as the flow changed I'd think there was a point to the error but this doesn't make sense to me. Anyone have any ideas?