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December 10, 2022, 06:03 |
Courant no. unstable
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#1 |
New Member
Rishi Kumar
Join Date: Jun 2022
Posts: 20
Rep Power: 3 |
Hi everyone,
I am trying to run a fluid flow simulation in an artery using pimple Foam. But the courant number is increasing abruptly. Earlier when i tried the same for simple tube it run perfectly with stable Courant No. Please help me to stablize the courant no. so that my simulation can converge.
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Rishi K. |
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December 19, 2022, 11:01 |
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#2 |
Senior Member
Josh Williams
Join Date: Feb 2021
Location: Scotland
Posts: 112
Rep Power: 5 |
I guess the artery has some curvature near the outlets which causes backflow issues. You may wish to change your BCs to a robust one that cancels backflow (I think totalPressure and inletOutlet do this).
Difficult to help without info such as your BCs, y+, any turbulence model etc.. |
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