PDF combustion modeling
 

Hi folks,

why the PDF combustion modeling is limited to incompressible flow only?

Is it possible to extend this approach to compressible flows?

Thanks Jim

Re: PDF combustion modeling
 

because combustion is being done at low mach numbers. snobs

Re: PDF combustion modeling
 

preconditioning enables compressible codes to deal with not only low mach numbers but also very low Mach number.

Re: PDF combustion modeling
 

what is meant by preconditioning and how this is done.???

regards sam

Re: PDF combustion modeling
 

Sam, Have a look at this link to know what is preconditioning: http://www.math.tau.ac.il/~turkel/precon.html Regards Jim

Re: PDF combustion modeling
 

your density does not vary with mixture fraction in your pdf model!?

Re: PDF combustion modeling
 

Donald, let us consider beta-PDF model, of course density is function of mixture fraction

Re: PDF combustion modeling
 

this may be a silly question, but when we are modeling using pdf combustion, i was been told that if we opt for the compressibility effects, after creating pdf table, we can treat that flow as compressible. am i in wrong notion??

can u help me out

srini

Re: PDF combustion modeling
 

this may be a silly question, but when we are modeling using pdf combustion, i was been told that if we opt for the compressibility effects, after creating pdf table, we can treat that flow as compressible. am i in wrong notion??, my mach numbers at the in the total combustion zone vary upto 0.34

can u help me out

srini

hello:
I'm new in fluent,recentlly I got a work to complete a combustion simulation with fluent,but I do not have enough references and books to teach me how to finish it. could you pleasd sent some initial toturials to me.thank you very much!
my E-mail:yubaibai88@163.com

Combustion
 

I need to do supersonic combustion in scramjet for my thesis. I am using Ansys fluent but i cant do nothing. I need some help about every steps in solution page