How can I ask author to send me his simulation result? I am working on my research paper. I read a paper that is related to my works. But I cannot reproduce the results. The information provided in the paper is not sufficient for me. How can I ask him to share his simulation works with me. 
Is there any specific email format for that?
As a general rule, you can ask anyone for anything. But they may not agree to give it, depending on quite a few factors. 

I think the only rule is to ask politely and not make claims that you dispute their results. But asking for the code to replicate the results, and explore them more deeply, is appropriate. But there isn't any specific format. 

If the other authors are honest then it is a bit more likely they will agree, but it isn't a given. There may be some aspects of their code that they want to keep private to avoid getting scooped.