|
[Sponsors] |
No convergence In Mesh Independency Study of Basic Jet in Crossflow Setup |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
January 31, 2024, 10:21 |
No convergence In Mesh Independency Study of Basic Jet in Crossflow Setup
|
#1 |
New Member
amiraladama
Join Date: May 2020
Posts: 13
Rep Power: 6 |
Hello,
I am trying to conduct a mesh independence study in a simple jet in crossflow analysis, but I have been unable to achieve convergence. My case setup is as shown in the visual below. All my equations have converged up to 10^-6, and there is no change in my control points throughout iterations. I am looking at the minimum temperature and velocity values on the facet created along a line at a certain distance from the jet flow. I have created multiple different meshes by dividing the global sizing values on Ansys Fluent's watertight meshing by 1.2 or 1.5 to reduce them. I have tried meshes ranging from 100 thousand cells to 20 million cells, but I have not been able to capture a specific trend. The discovered values, from coarse mesh to fine mesh along the line, are the lowest temperatures as follows: 460, 452, 424, 433, 402, 370, 380, etc. Even with 20 million cells, the values are still changing. I selected the fluid as air with its properties set as time-dependent. I also tried setting them all as constant, but there was no change. I have tried with all turbulence models and wall functions, and similarly, I have tried all solution schemes, but there is a consistent inconsistency, and the results vary as the mesh changes. I am awaiting your help. Thank you. |
|
Tags |
ansys, crossflow, fluent, jet flow, mesh independence study |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
decomposePar problem: Cell 0contains face labels out of range | vaina74 | OpenFOAM Pre-Processing | 37 | July 20, 2020 06:38 |
Poor convergence: just mesh or numerics? | piotr.mecht | OpenFOAM | 10 | May 12, 2020 12:05 |
having problems with performing grid convergence study in SWFS | drdet | FloEFD, FloWorks & FloTHERM | 12 | January 22, 2015 05:44 |
basic of mesh refinement | arya | CFX | 4 | June 19, 2007 13:21 |
Icemcfd 11: Loss of mesh from surface mesh option? | Joe | CFX | 2 | March 26, 2007 19:10 |