3), takes care of quantities needed in the solver that only have to be computed once for the entire simulation.
1- Nooc loogu talagalay in caloosha lagu celiyo kaliya oo la xirto xilliga jimicsiga kaasoo kaa saacida in miisaan dheeraad ah uu caloosha saaro si cadaadiskaas ay murqaha caloosha ay adeeg u noqdaan.