Difficult to give advices with so little details.
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1. I want to know if there are risks involved in this?
There is no risk with a software written will enough. Note that it is always possible to write a program so bad, so biassed that it will need more resources as time goes on and in the end it can crash your PC by hogging all resources.
In fact, depending on how the software is written, it range from safe to catastrophic.
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2. How to avoid this and simulate the process?
Simulating a process need more resources than the process itself, so it is not a good idea.
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I have tried running it for 1 hour.
Your only forgot to tell us if you got problems during that hour. Did you see it eating more and more memory or was it stable ?