u/Natural_Taste8832

im currently doing an internship where I have to do a simulation of a thermite reaction on python. I just finished my first year of engineering and havent learned a lot of the things that seemed necessary to start this project. They gave me a few readings, an old code that needs over 20 hours to run and said good luck. The current code is explicit, and they told me to turn it into an implicit one. From what i understood, i have to recode the whole thing using a completely different way to calculate all the different reactions (enthalpy, phase changes, etc..) but im really not sure where to start and was hoping to find some guidance.