Learning Forum

[Atish Gawale]

Hello,

I am using CESE solver to simulate adiabatic expansion of compressed H2 gas (700bar) into surrounding air using chemkin mechanism. H2 should react with O2 to form water. 

It is found that there was no ignition at h2-air interface. but when I patch few elements surrounding compressed H2 gas with product H2O, then I can see combustion happening at gas -air interface. I was wondering why presence of H2O has strong influence on ignition. Is it related to turbulence model or CESE solver? or chemkin mechanism? Can you share the equations related to ignition mechanism in CESE solver.   

[Reno Genest]

Hello Atish,

Which LS-DYNA keywords are you using? Could you post your main keywords here as text?

Note that Ansys employees cannot updload and download files on the Ansys Forum. 

If you are a commercial customer, please create a support case on ACSS and we will have a look at your model:

customer.ansys.com

 

Let me know how it goes.

 

Reno.