Nikhil Narale
Ansys Employee

Hello, 

 

"how to define such initial conditions, that the first part of geometry has pressure of 8 bar and the remaining two parts have 1 bar"

You can patch different cell zones with the initial pressure values. Check this section of the user's guide for more info: 32.9.2. Patching Values in Selected Cells (ansys.com)

 

"how to define that the whole boundary consist of stochiometric mixture of hydrogen and air."

I didn't get this. Can you please elaborate? 

 

"how to import combustion mechanism for detonation of hydrogen-air mixture"

For this, you may want to check this: 44.1.54. File/Import/CHEMKIN Mechanism... (ansys.com)

 

If you are not able to access the links, please refer to this forum discussion: How to access the ANSYS Online Help

 

Thanks!

Nikhil