CFD Online Discussion Forums

CFD Online Discussion Forums (
-   Main CFD Forum (
-   -   supersonic jet (

shuo October 22, 2007 04:58

supersonic jet
I am trying to simulate an supersonic jet and compare it with experimental results uses shadowgraphy. How can I produce a 'numerical schliren' for comparison? Is is the density derivative?


Shuo October 23, 2007 00:51

Re: supersonic jet
For supersonic jets the literature gives the exit pressure ratio Pe/Patm and the exit Mach number. If I am doing numerical simulation i also need the density ratio rho_e/rho_atm. How can I estimate this?

Anton Lyaskin October 23, 2007 05:50

Re: supersonic jet
Try to search the forum - I'm sure I've seen the procedure to get "numerical schliren". Probably it was Star-CD forum, not the main one.

shuo October 23, 2007 18:06

Re: supersonic jet
I read that some papers that plotted the log(base 10?) of density gradients. I wonder what direction the density gradient is in x, y?

All times are GMT -4. The time now is 03:06.