Simulations require an enormous amount of processing capacity to develop scenarios with multiple parameters in constant flux. This applies to everything from microbiology to medicine to cosmology. Mass General Hospital has a Mac-only program that does 3D visualization of MRI data that is currently being used to track nerve impulses in the search for answers to migraines, for one example.
So such simulations would be harnessing the same computing power that enables a Mac to stream 7 videos at a time. And that a Mac will do these simulations better than Windows machine.
BTW do you have any idea if any “Global Warming” simulations are done on Macs