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-   -   2d nozzle simulation, need help (http://www.cfd-online.com/Forums/main/68626-2d-nozzle-simulation-need-help.html)

swee5420 September 26, 2009 01:49

2d nozzle simulation, need help
 
I am currently conducting a project of simulating supersonic flow in a nozzle in 2d.
My problem is how to define the area of the inlet and outlet of the nozzle, since the reporting surface area is incorrect.

For example, the inlet has a diameter of 21mm, hence the actual area should be A=D^2 x pi /4 = 3.46E-4. But the reporting surface area is 21mm^2, which leads to an incorrect reporting mass flowrate too.

How do i change the surface area so that the reporting area, mass flowrate will be correct?

Thanks in advance

sharan September 30, 2009 01:41

supersonic flow analysis of 2D Nozzle
 
Are you using any software for the simulation ? if yes which software are you using. In software you need not calculate any areas. I have done a similar project using Fluent on a C-D nozzle considering the upper half since is axi-symmetric. In such case area should be equal to radius(r)*depth(d) and since the depth is unity so area is equal to r m^2.

If you can tell me about the type of nozzle you have chosen and other details I can help you further.


Rami September 30, 2009 05:32

Seems like your software is unaware of your geometry being axisymmetric, and treats it as planar of unit thickness.

upal_arif May 24, 2012 00:33

Looking for qualified freelancer to simulate supersonic flow through C-D nozzle using fluent 6.2.16

please contact upal_arif@yahoo.com








Quote:

Originally Posted by sharan (Post 230938)
Are you using any software for the simulation ? if yes which software are you using. In software you need not calculate any areas. I have done a similar project using Fluent on a C-D nozzle considering the upper half since is axi-symmetric. In such case area should be equal to radius(r)*depth(d) and since the depth is unity so area is equal to r m^2.

If you can tell me about the type of nozzle you have chosen and other details I can help you further.




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