I'm assuming you're looking for information on Fluidsim 4.5, a simulation software used for fluid dynamics and other related fields. Here's what I could gather:

Regarding the term "full crack hot" in your search query, note that attempting to crack or illegally activate software can be against the terms of service and potentially harmful. Many software providers, including the creators of Fluidsim, offer legitimate ways to access their products, such as purchasing licenses or using free trials.

Fluidsim 4.5 is a software tool used for simulating various fluid dynamics phenomena, such as fluid flow, heat transfer, and mass transport. It's commonly used in fields like aerospace, chemical engineering, and mechanical engineering.