I´m running a transient simulation of the compression of a fluid in a closed chamber using the "compressible liquid" density method. This method calculate the density as function of the pressure for isothermal condition.
To initialize the simulation, I opened the cylinder and then at 1E-5s I closed it by changing an interface from interior to a wall.
I have used a time step of 1E-6s at the beginning with 100 it/time step. At 2000 iterations I have change the time step to 5e-6s.
The problem is that the continuity equation is being increase at beginning of each new time step.
Should I change the under relaxation factors? Your help is welcome.