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Solving simple microfluidic temporal study fails

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Hello,
I have designed a 2D model looking like a circular volume with one input and output channel.
I have one physic (laminar flow) and 1 material (water).
I have set a laminar flow with a flow rate of 1mL/min (about 10^-8 m^3/s) as input and a null pressure as output.
I managed to compute the steady state, but the solver display an error while trying to compute a temporal simulation. I tried several times and time step but I always get the same message :
"
Echecs des tests d'erreur répétés. Une singularité a peut être été atteinte.
Temps : 0.
Le dernier pas de temps n'a pas convergé.
"

"
Repeated tests failed. A singularity might have been reached.
Time : 0
The last time step did not converged
"
Any suggestions ?
What can I attach that might help you spot the source of the issue ?
Thanks

0 Replies Last Post 28 avr. 2017, 10:47 UTC−4
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Hello Laurent Thomas

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