CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > SU2 > SU2 Installation

dual time stepping in pitching airfoil simulation

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 7, 2018, 11:54
Default dual time stepping in pitching airfoil simulation
  #1
Member
 
mike
Join Date: Jun 2011
Posts: 42
Rep Power: 11
fluidmechanics is on a distinguished road
Dear All;

I am trying to simulate deep dynamic stall over a pitching Naca 0012 at subsonic using SU2 V6 binary files. Same as SU2 unsteady cfg test case files, dual time stepping 2nd order is selected for unsteady simulation considering 25 points in a cycle with 1500 internal iteration. Two problems exist: First: Although 25 point per an oscillating period seems desirable and less expensive (fast simulation), but the amount of high internal iterations remove that benefit. Considering less internal iterations causes divergence. Second: due to little points per oscillation (25 or 36), some important features of stalled flow and vortex behavior are not captured.
I have done similar study (deep dynamic stall) using implicit time discretization of fixed time step using a commercial solver with more grid points and less cpu time using the same system config.
Is it possible to perform unsteady dynamic mesh simulation with implicit fixed time step in SU2? Or any other recommendation?
fluidmechanics is offline   Reply With Quote

Old   August 30, 2018, 09:00
Post unsteady simulation of a pitching airfoil
  #2
New Member
 
Milad
Join Date: Feb 2018
Posts: 17
Rep Power: 4
milad092 is on a distinguished road
hi,

I am sorry because i have no information about your errors.
if it is possible can i ask you a question?
i am simulating a pitching airfoil in openfoam and i have some problems in solving it.
do you know whats the boundary condition between circle contain airfoil and the other domain?
is that interface?
milad092 is offline   Reply With Quote

Reply

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
Dual Time Stepping t.teschner Main CFD Forum 7 August 4, 2017 03:37
Superlinear speedup in OpenFOAM 13 msrinath80 OpenFOAM Running, Solving & CFD 18 March 3, 2015 06:36
Discrete event simulation vs. fixed time (discrete time simulation) jenjon FLUENT 0 March 10, 2013 07:58
same geometry,structured and unstructured mesh,different behaviour. sharonyue OpenFOAM Running, Solving & CFD 13 January 2, 2013 23:40
plot over time fferroni OpenFOAM Post-Processing 7 June 8, 2012 08:56


All times are GMT -4. The time now is 20:22.