Yash,
Due to third-party royalties, the free Student edition doesn't include the full version of Simulate. However, you can still access Simulate lite by opening a part in Creo Parametric, navigating to the Applications tab, and selecting Simulate.
If you still find that you need the full version of Simulate, you will have to purchase the full Academic version from the PTC Store: http://store.ptc.com.
Regards,
Chris