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Convergence problem with time dependent Laminar flow inlet condition.
Posted Apr 10, 2018, 2:43 a.m. EDT Fluid & Heat, Studies & Solvers Version 5.3a 0 Replies
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Hi. I'm trying to apply a time-dependent inlet condition in my model.
what I want is 0.00667m/s mean velocity flow during 81sec. and after 81sec., 0.00476m/s. for this, I defined a Piecewise function. (you can check at 'file 1') and at inlet boundary condition in Laminar flow, I set "Laminar inflow", "Average velocity", typed Average velocity Uav as "f(t)".
I thought every thing what have to do was done, and I computed my model with Time Dependent Study. but it didn't work well, and An error message came out. " Nonlinear solver did not converge. Time : 1.45519~~~~~~~e-019 Maximum number of Newton iterations reached. Last time step is not converged. "
I also tried to use 'if-statement'. but same thing happened.
How could I solve this problem? Please somebody help me... Thanks.
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Hello Jungmin Park
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