|
[Sponsors] |
May 1, 2024, 11:54 |
Negative cell volume error [Mehs motion]
|
#1 |
New Member
Join Date: Apr 2023
Posts: 15
Rep Power: 3 |
I'm currently conducting a CFD analysis of a pusher propeller on a medium-sized aircraft. To study the increase of the drag on the entire aircraft (I have done a separate analysis of the aircraft with CLEAN geometry, meaning no propellers or landing gear).
To do this I have created 2 cell zones. The enclosure and a rotary zone (a cylinder with the propeller geometry subtracted from it) that rotates at a given RPM. My mesh is very high quality and my number of cells is around 15 million. using the mesh motion I set the RPMs and the rotation origin and axis.* When I set the mesh motion it swaps to the transient solver, moving on I keep getting the error message: Update dynamic mesh failed. Negative cell volume detected. Noted that I have done this very same method with other projects and it has worked. My issue now is that even when I go back to the old projects I get the same message and the same error. what could be the cause of this issue? I have read that making the mesh COARSER could potentially fix this. I have tried every possible solution, I've made my mesh so much finer that it has reached 40M, I have decreased my timestep to 1e-5 and I still get this error. I can't find a way to solve this. So Please guys I need your help |
|
May 8, 2024, 15:25 |
|
#2 |
Senior Member
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,922
Rep Power: 28 |
what software do you use?
|
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Negative Cell Volume Dynamic Mesh (Relative Motion) | farich_d | FLUENT | 1 | March 5, 2022 19:22 |
Negative cell volume issue in Fluent | sidharath | FLUENT | 0 | October 7, 2021 05:58 |
How to use "translation" in solidBodyMotionFunction in OpenFOAM | rupesh_w | OpenFOAM Running, Solving & CFD | 5 | August 16, 2016 05:27 |
channelFoam for a 3D pipe | AlmostSurelyRob | OpenFOAM | 3 | June 24, 2011 14:06 |
negative cell volume in dynamic mesh | WU zhonghua | FLUENT | 0 | July 28, 2004 11:04 |