I’m working on biomass gasification. In the simulation, dt_fac = 1 and time step = 9 * 10 ^ -5 seconds. Simulation time 20 seconds. the simulation runs to start but returns dt_fac> = 1 in 7 seconds. How can I solve it?
It might because you used the constant time step (dt_fac=1), that made the flow solver can not converge at the time step you specified. Try reduce your time step or use variable time step (!dt_fac=1)