|November 11, 2014, 09:12||
Residuals high for 2D Convergent divergent nozzle simulation
Join Date: Sep 2013
Posts: 2Rep Power: 0
Hello, I met problems when simulating a 2D axisymmetric convergent-divergent nozzle using density-based solver in Fluent.
I calculated my inlet and outlet boundary conditions following the 1D analysis of gas dynamics, for throat Mach number 1 and 0.7 respectively. Specified four types of boundary for inlet and outlet:
1. Velocity inlet & Pressure outlet
2. Pressure inlet & outlet
2. Pressure-far-field for inlet & outlet
3. Mass flow inlet & outlet
And I also tried to lower the Courant number to 0.1.
However, all simulations result in a very high residual level. The x-velocity residuals are as high as 50.
I'd appreciate it if anyone can give me some help.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Convergent Divergent Nozzle||Hrishikesh||Main CFD Forum||12||June 25, 2016 02:06|
|air jet nozzle simulation in cfx||jonior||CFX||1||September 20, 2014 06:16|
|High residuals in OF||andrei.cimpoeru||OpenFOAM Running, Solving & CFD||1||March 1, 2013 12:46|
|Residuals converged but high||Gilles||CFX||2||September 30, 2008 19:05|
|Nozzle Flow Simulation||Winnie||CFX||0||August 24, 2007 10:10|