# one-way-coupled magnetohydrodynamics with transient magnetic fields

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

 September 27, 2013, 06:20 one-way-coupled magnetohydrodynamics with transient magnetic fields #1 New Member   Christoph Kratzsch Join Date: Nov 2011 Location: Freiberg Posts: 27 Rep Power: 7 Hi everyone, i 'm searching for a method to add the one-way-coupled MHD-equations with momentum source of transient magnetic fields. This means quasi-(static) approximation for low magnetic Reynolds-numbers but not static . I searched a lot in the literature, but can't find a reference regarding that problem. Can everyone share some information, where i can find a solution for that? Best regards , Christoph

 September 30, 2013, 09:31 #2 Senior Member   Jonas T. Holdeman, Jr. Join Date: Mar 2009 Location: Knoxville, Tennessee Posts: 108 Rep Power: 10 I am not sure what you are asking. Do you mean adding a Lorentz force term to the fluid equations for specified magnetic fields? By one-way do you mean the magnetic field affects the fluid but the fluid does not affect the magnetic field?

September 30, 2013, 11:34
Sry for the coarse description ;-)
#3
New Member

Christoph Kratzsch
Join Date: Nov 2011
Location: Freiberg
Posts: 27
Rep Power: 7
Quote:
 Originally Posted by Jonas Holdeman I am not sure what you are asking. Do you mean adding a Lorentz force term to the fluid equations for specified magnetic fields? By one-way do you mean the magnetic field affects the fluid but the fluid does not affect the magnetic field?
Hi Jonas,

yes i mean the addition of an lorentz-force-term to the Navier-Stokes-Equations.
At this time i'm using quasi-static approximation inside a solver:

This is maintained if the magnetic reynolds number . The magnetic fields reads: . But i don't have the possibility to describe time-dependent magnetic fields.

In an two-way-coupling i have a time variation due to the coupling of velocity and magnetic field. Therefore :

Now i want a time-varying magnetic field or . This means rotating, travelling or pulsating magnetic fields without two-way-coupling.
Maybe i don't understand it right. So please can you explain why two-way-coupling is necessary if the initial magnetic fields become time-dependant and the induced magnetic fields will be neglected.

Best regards ,

Christoph

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post henningh OpenFOAM 2 April 28, 2014 21:14 immortality OpenFOAM Post-Processing 8 June 16, 2013 11:25 immortality OpenFOAM Running, Solving & CFD 3 June 3, 2013 22:36 Souviktor FLUENT 0 May 22, 2010 02:19 Dmitriy Makarov FLUENT 1 February 9, 2007 18:06

All times are GMT -4. The time now is 13:35.