My forceCoeffs has very serious numerical oscillations -- CFD Online Discussion Forums

July 2, 2023, 21:24

My forceCoeffs has very serious numerical oscillations

GrpOne123

New Member

Grp

Join Date: Feb 2023

Posts: 14

Rep Power: 3

Hello gus！I used the immersion boundary method of foam-extend 4.1 to calculate the fluctuation of the airfoil, and why the calculated thrust coefficient and drag coefficient changed very sharply, not a smooth sine wave.
In addition, when I solved, the number of iterations of the pressure equation was very large, between 400-1000 times, is it because p is inaccurate.
Below are my controlDict and fvschems and fvsolutions files.
Does anyone until how to fix this？Thank You！

Attached Images

4e967c7cb91a0ba295b40aa72f4e8c8.jpg (77.4 KB, 11 views)

Attached Files

files.zip (4.1 KB, 0 views)

« Previous Thread | Next Thread »

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 Forum Rules

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
numerical oscillations in flow parameters	alimea	OpenFOAM Running, Solving & CFD	2	November 1, 2018 11:23
Numerical oscillations Roe solver shallow water equations	RicardoGoncalves	Main CFD Forum	1	March 5, 2012 03:03
Numerical oscillations in CFX with water boiling problem.	michujo	CFX	4	December 16, 2011 09:00
Numerical oscillations in LES due to mesh refinement	Soder	OpenFOAM	0	June 14, 2011 10:10
Numerical simulations of resonance oscillations	H.Tong	Main CFD Forum	1	September 8, 1999 20:14

All times are GMT -4. The time now is 20:32.