Please start a thread in the technical forums with your questions about that simulation. Depending on what you are trying to simulate, it may fit best in the EE forum or the Physics/Electromagnetics forum or the Physics/Classical Physics forum.
Also, the more work you can show in your thread start, the easier it will be for us to help you. Thanks.
I’m a retired ex physicist I guess. Although I have a first degree in theoretical physics and did post graduate studies ( structural phase transitions in strontium Titanate, I did not pursue a career in physics. However it has always been my first love. Since retiring I’ve been interested in quantum computing and quantum mechanics