Could you at least explain what you want to create? What kind of simulation? What you want to show in the simulation?
Do you have the formula now? What are the form of your formula? What is your model for the simulation?
There are so many information which you did not provide.
I can not read your mind.

I think you also need to learn: How to ask a question effectively?  How to explain your problem?
If I do not have a very clear picture of what you really want to do. There is no way I can help.