Simulate with complex geometries and complex physics
DELT_dt_variable
(optional) let MESHFREE control the time step size
DELT_dt_variable = 1
default: DELT_dt_variable = 0
- DELT_dt_variable == 0 :: MESHFREE steadily increases the time step size from DELT_dt_start until DELT_dt is reached.
- DELT_dt_variable == 1 :: MESHFREE controls the time step size by itself but does not exceed DELT_dt (adaptive time stepping).
- DELT_dt_variable == 2 :: in case of KOP(iChamber)=EULERIMPL, same as DELT_dt_variable == 1, BUT SWITCH OFF classical time adaptivity with embedded Runge-Kutta-methods (which usually leads to temporarily decreasing time step size, but which often produces overshoots such as inconsistent temporary pressure peaks)