[swak4Foam] Rigid body Rotation about an axis using groovyBC.

msrinath80 · August 12, 2014, 16:41

Hi all,

Can someone provide an example for how to specify rotation (fixed RPM) of an arbitrarily shaped internal boundary about say the Y-axis?

Thanks for your help!

gschaider · August 12, 2014, 17:30

Quote:

Originally Posted by msrinath80

Hi all,

Can someone provide an example for how to specify rotation (fixed RPM) of an arbitrarily shaped internal boundary about say the Y-axis?

Thanks for your help!

That'd be "f*(vector(0,1,0) ^ pos())" (^is the cross product in OpenFOAM/swak)

Calculating the scalar factor f is left to the reader as an exercise

msrinath80 · August 12, 2014, 17:50

haha, thanks Bernhard. That v = [omega] X [R] could be written with such simple abstraction in groovyBC is simply beautiful!

gschaider · August 12, 2014, 19:20

Quote:

Originally Posted by msrinath80

haha, thanks Bernhard. That v = [omega] X [R] could be written with such simple abstraction in groovyBC is simply beautiful!

You're welcome. As it is quite a frequent "pattern" consider writing a Usage Example at http://openfoamwiki.net/index.php/Co...Usage_examples

August 12, 2014, 16:41	Rigid body Rotation about an axis using groovyBC.	#1
msrinath80 Senior Member Srinath Madhavan (a.k.a pUl\|) Join Date: Mar 2009 Location: Edmonton, AB, Canada Posts: 703 Rep Power: 21	Hi all, Can someone provide an example for how to specify rotation (fixed RPM) of an arbitrarily shaped internal boundary about say the Y-axis? Thanks for your help!

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August 12, 2014, 17:50		#3
msrinath80 Senior Member Srinath Madhavan (a.k.a pUl\|) Join Date: Mar 2009 Location: Edmonton, AB, Canada Posts: 703 Rep Power: 21	haha, thanks Bernhard. That v = [omega] X [R] could be written with such simple abstraction in groovyBC is simply beautiful!