Wrong time-step value read by precice.advance when using the "first-participant" method in seriel-explicit coupling for OpenFOAM about openfoam-adapter

[mokerren]

The problem is solved. I thought that with the method of "first-participant" the procedure is that the openfoam conducts calculation first and then pass the timestep that it used to the structure code. This assumption is wrong. The timestep is passed to the structure code before the openFoam actually making the calculation. Therefore, if the writecontrol is set as "adjustableRunTime", it will modify the timestep used by the openFoam to make sure that the output will be wrote at the excat time points. Then, the actual time step used by the openFoam is different from the one used by the structure code. So, after I change the writecontrol to "RunTime", the problem is solved.