This offering is not approved or endorsed by ESI Group or ESI-OpenCFD®,
the producer of the OpenFOAM® software and owner of the OpenFOAM® trade mark.

foam-extend-3.1 "Zagreb" is released The Extend Project is proud to announce the next release of the community fork of OpenFOAM®: foam-extend-3.1 [link]!
CoCoons Project - Community-driven Documentation of OpenFOAM® Technology! For more information have a look at!
Welcome, Guest
Please Login or Register.  Lost Password?

Rotating boundary conditions for transient case
(1 viewing) (1) Guest
Special Interest Group on Turbomachinery Group Forum: The OpenFOAM® Turbomachinery Working Group was initiated at the Second OpenFOAM® Workshop in Zagreb, June 2007.

Responsibles: Maryse Page, Martin Beaudoin (Hydro-Québec) and Hakan Nilsson (Chalmers).

The group has lots of contributions in the OpenFOAM® Wiki:
Go to bottomPage: 1
TOPIC: Rotating boundary conditions for transient case
Rotating boundary conditions for transient case 4 Years, 1 Month ago Karma: 1

I just want to provide a warning about the movingWallVelocity boundary condition used for transient simulation (usually with transientSimpleDyMFoam).

The problem is that this boundary condition computes the velocity as the distance between the previous and the actual time step of a face center, divided by the time step value. Therefore only a straight line is considered and not the arc of circle, which is the correct distance.

Although this problem will affect your computation significantly only for large time step (more than 30 degrees). I even suggest you to change the movingWallVelocity into movingRotatingWallVelocity, which is physically more correct.

Best regards,

Christian Vessaz
Christian Vessaz
Fresh Boarder
Posts: 1
User Offline Click here to see the profile of this user
The administrator has disabled public write access.
Go to topPage: 1
Joomla SEO powered by JoomSEF


OpenFOAM®-Extend World

You need to upgrade your Flash Player

Legal | Imprint
©Copyright 2014 The OpenFOAM® Extend Project 

Powered by Joomla! Designed by Joomla Templates, ecommerce web hosting, Thanks to J! Developer Goran Gligorin for support! Joomla SEF URLs by Artio. Powered by Staff Master v0.9.8 Valid: XHTML and CSS

Friends Online