|
[Sponsors] |
How to converge natural convection with bad mesh. |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
November 9, 2023, 22:47 |
How to converge natural convection with bad mesh.
|
#1 |
New Member
Xander
Join Date: Oct 2023
Posts: 3
Rep Power: 3 |
I'm simulating with Fluent (Icepak) with a very skewed mesh, and we cannot simplify geometry at this point.
Transient natural convection with Ra ~ 1e8. Been using laminar solver in an older version of Icepak/Fluent, which detects divergence but corrects itself. In old Fluent/Icepak, warning is: # Divergence detected in AMG for pressure correction: protective actions enabled! # Divergence detected in AMG for pressure correction, temporarily solve with BCGSTAB! This happens frequently during iterations, but simulation still converges/completes. With new Fluent/Icepak, however, we get this: Stabilizing pressure correction to enhance linear solver robustness. Stabilizing pressure correction using GMRES to enhance linear solver robustness. Divergence detected in AMG for pressure correction Error at host: floating point exception It seems like new Fluent/Icepak does not have the same protective mechanisms as old Icepak. 1. How to stabilize natural convection with a bad mesh? 2. How to use whatever old Fluent/Icepak was using to achieve a complete solution? |
|
Tags |
divergence, fluent - parallel, icepak, natural convection, pressure |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
flow over cylinder in openFoam | saeed jamshidi | OpenFOAM Pre-Processing | 3 | August 11, 2023 16:16 |
[snappyHexMesh] SnappyHexMesh/splitMeshRegion : region1 in zone "-1" | GuiMagyar | OpenFOAM Meshing & Mesh Conversion | 3 | August 4, 2023 13:38 |
foam-extend-4.1 release | hjasak | OpenFOAM Announcements from Other Sources | 19 | July 16, 2021 06:02 |
[snappyHexMesh] very bad quality snapped mesh | federicabi | OpenFOAM Meshing & Mesh Conversion | 18 | September 26, 2018 11:33 |
[mesh manipulation] Importing Multiple Meshes | thomasnwalshiii | OpenFOAM Meshing & Mesh Conversion | 18 | December 19, 2015 19:57 |