|July 20, 2009, 04:13||
Nozzle - Simulation converges, but data incorrect
Join Date: Jul 2009
Posts: 2Rep Power: 0
I'm running a simulation on a laval converging-diverging nozzle, and while the answer is converging, the values are lower than what Fluent gave (a program I don't currently have access to, which is why I am using CFX, which I am less familiar with), or what experiments show. The problem is set using the energy equation, with a pressure inlet and supersonic outlet. The residuals are good, and the flow profile makes sense, but the velocities are about 20% low.
Because of the high pressure (~40 atm), I started with lower pressures and a subsonic outlet, and built up the speed slowly. In searching results, most people seem to have trouble with convergence, which I did not, but if anyone has any idea why the values are unusual, they would be much appreciated.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Need assistance in BC's for simulation of Vacuum cleaning nozzle||bruce||OpenFOAM Running, Solving & CFD||0||May 22, 2009 13:56|
|Data on Converging-Diverging Nozzle;||Mohammad||Main CFD Forum||0||September 5, 2002 23:55|
|Ventilation Simulation & Experiment Data||Luo Shengping||Main CFD Forum||2||November 29, 2000 11:29|
|Turbine flow simulation data||Mohan Varma||Main CFD Forum||3||October 18, 1999 09:27|
|3-D Contaminant Dispersal Simulation||Apple L S Chan||Main CFD Forum||1||December 23, 1998 11:06|