[dark001001]

I ran a NACA0012 aeroelastic test from a steady result and reached a divergence. The config is like below.
The parameters of the steady flow calculation almost the same as the aeroelastic test except the parameters of UNSTEADY_SIMULATION.
BTW, what's the meaning of MACH_MOTION, any difference to the MACH_NUMBER?

[cspode]

Dear,

For the aeroelastic case, the free-stream temperature is updated internally, see solver_direct_mean.cpp to match the flutter speed index and other aeroelastic input variables:

TgammaR = ((vf*vf)*(b*b)*(w_alpha*w_alpha)*mu) / (Mach*Mach);

You need to run your steady state with the same temperature and add two collumns in the solution_flow_00000.dat and solution_flow_00001.dat regarding grid velocities to restart properly. You can set Grid velocities to zero to start from rest.

Best.