Deflagration/Explosion simulation in Fluent
 

Hi everyone,

I need a bit enlightening from some experienced user in combustion.

I have to simulate deflagration and explosion of several imflammable atmospheres in a confined space to predict blast loads.


I´ve been reading Fluent manuals but I still don´t know how to address this issue, it´s my first time simulating combustion.

I have 2 questions:

1- My atmosphere is explosive due to a gas leackage, therefore I consider it quite still and I´ve thought the premixed model will do the job, can you confirm this?. What conditions would make necessary to change to a different combustion model?.

2- How can I know whether a deflagration or explosion is going to take place?. Do I have to define it somehow within Fluent or does the software "knows" how to handle it (shockwave creation) depending on the properties of the fuel and model?

Thank you very much in advance, any help will be most appreciated.

Best regards

Bert