CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > ANSYS Meshing & Geometry

[ANSYS Meshing] Mesh independence for a baffled 2D mixing tank

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   April 29, 2023, 11:18
Default Mesh independence for a baffled 2D mixing tank
New Member
Joe walker
Join Date: Apr 2023
Posts: 14
Rep Power: 3
Joe walker1 is on a distinguished road
I'm trying to perform a mesh independence study for a 2D mixing tank which uses a sliding mesh. Also, the case is transient.
I am measuring velocities, dissipation rates and RMS velocities near the baffles on the outside of the tank. The velocities and dissipation rates converge to a constant value, whereas the RMS values are still rising. As I understand, the RMS is supposed to take longer.
My question is, is this an indication the mesh isn't refined enough, or is it that the simulation time is too short? Or could it be an issue with the timestep I have used.
The case I'm currently testing is a 100mm diameter turbine, inside of a 300mm tank, at 250rpm. The mesh has ~73,000 elements. The calculation conditions are 600 time steps and 0.02s per.
The simulations take very long so I was hoping to get advice on here before I waste time changing the wrong thing about the simulation.

Any help is greatly appreciated, as this is very important.
Joe walker1 is offline   Reply With Quote


convergence check, independance, mesh, mixing, rms velocity

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
[ANSYS Meshing] Mixing tank hexahedral mesh (with zero thickness rushton blade) Bil ANSYS Meshing & Geometry 0 March 2, 2022 09:04
Structured Mesh of a Dragonfly wing while conducting Mesh Independence rsunil Mesh Generation & Pre-Processing 0 September 18, 2021 12:25
[snappyHexMesh] non uniform mesh near the stl object vava10 OpenFOAM Meshing & Mesh Conversion 0 January 31, 2021 14:41
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20
Mesh motion with Translation & Rotation Doginal CFX 2 January 12, 2014 06:21

All times are GMT -4. The time now is 02:53.