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dual time stepping in pitching airfoil simulation

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Old   March 7, 2018, 10:54
Default dual time stepping in pitching airfoil simulation
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Dear All;

I am trying to simulate deep dynamic stall over a pitching Naca 0012 at subsonic using SU2 V6 binary files. Same as SU2 unsteady cfg test case files, dual time stepping 2nd order is selected for unsteady simulation considering 25 points in a cycle with 1500 internal iteration. Two problems exist: First: Although 25 point per an oscillating period seems desirable and less expensive (fast simulation), but the amount of high internal iterations remove that benefit. Considering less internal iterations causes divergence. Second: due to little points per oscillation (25 or 36), some important features of stalled flow and vortex behavior are not captured.
I have done similar study (deep dynamic stall) using implicit time discretization of fixed time step using a commercial solver with more grid points and less cpu time using the same system config.
Is it possible to perform unsteady dynamic mesh simulation with implicit fixed time step in SU2? Or any other recommendation?
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Old   August 30, 2018, 08:00
Post unsteady simulation of a pitching airfoil
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I am sorry because i have no information about your errors.
if it is possible can i ask you a question?
i am simulating a pitching airfoil in openfoam and i have some problems in solving it.
do you know whats the boundary condition between circle contain airfoil and the other domain?
is that interface?
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