CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Pressure plot not smooth in dynamic mesh simulation

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

LinkBack Thread Tools Search this Thread Display Modes
Old   November 9, 2023, 11:05
Default Pressure plot not smooth in dynamic mesh simulation
Senior Member
CFDKareem's Avatar
Join Date: Nov 2022
Location: New York
Posts: 120
Rep Power: 3
CFDKareem is on a distinguished road
Hello, I've run into a problem that has stumped me and wanted to see if anyone else has an idea. I am doing a multiphase VOF model with mesh motion. The domain looks like a syringe with a plunger. I am applying a velocity input to the plunger to generate pressure in the fluid. When I output the average pressure in the fluid it gives a jagged graph, where the pressure holds for a few time steps then jumps up or down. Does anyone have any idea why this is happening? Output of the plunger position and velocity both gives smooth graphs.

My initial thought was somthing to do with the remeshing as the plunger is moving, but it happens even after the movement has stopped. See attached picture for details.
Attached Images
File Type: png PressureAliasing.PNG (46.8 KB, 3 views)
Please like the answer if it helped!

Video Tutorials and Tips:
CFDKareem is offline   Reply With Quote


dynamic mesh zones, monitor expression, vof method

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
What are the best settings for a channel flow simulation? Ashkan Kashani CFX 3 October 13, 2022 21:36
Moving mesh simulation with mesh changes inside the solver cgoessni OpenFOAM Programming & Development 2 January 24, 2022 09:14
Issues on the simulation of high-speed compressible flow within turbomachinery dowlee OpenFOAM Running, Solving & CFD 11 August 6, 2021 06:40
objects oscillate at high speed causing collapse in Dynamic mesh and overset mesh ca insane OpenFOAM Running, Solving & CFD 0 May 17, 2020 22:35
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 11:55

All times are GMT -4. The time now is 23:54.