[swak4Foam] stagnation at groovyBC

immortality · November 27, 2012, 02:26

How is it possible to have a p0 and T0 boundary condition without having velocity field at inlet in groovyBC?just these stagnation properties are known.its important for me.sorry for repeat.

treima · November 27, 2012, 02:35

Hi,

do you mean fixedValue boundary conditions?

regards

treima

immortality · November 27, 2012, 03:19

hi dear treima
no.its known only stagnation temp and press on inlet patch.then I dont know haw I put velocity boundary condition.Im working on it.but ill thank any idea.
Thank you for your helping and benefitical suggestions on before posts.thanks.

treima · November 27, 2012, 03:21

For the velocity i would suggest zeroGradient.

immortality · November 27, 2012, 04:08

thank you treima
But I think velocity should read from outside of the grid domain.due to characteristic law you may know that tell at inlet 5 property should be assigned from out and only 1 from inside the domain and vice at outlet for stability of solution.
But velocity have 3 components
But ill examine your good suggestion if it didn't have stability problem all is ok.
Thanks.

November 27, 2012, 02:26	stagnation at groovyBC	#1
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	How is it possible to have a p0 and T0 boundary condition without having velocity field at inlet in groovyBC?just these stagnation properties are known.its important for me.sorry for repeat.

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November 27, 2012, 02:35		#2
treima Member Join Date: Mar 2012 Location: Munich, Germany Posts: 67 Rep Power: 14	Hi, do you mean fixedValue boundary conditions? regards treima

November 27, 2012, 03:19		#3
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	hi dear treima no.its known only stagnation temp and press on inlet patch.then I dont know haw I put velocity boundary condition.Im working on it.but ill thank any idea. Thank you for your helping and benefitical suggestions on before posts.thanks.

November 27, 2012, 03:21		#4
treima Member Join Date: Mar 2012 Location: Munich, Germany Posts: 67 Rep Power: 14	For the velocity i would suggest zeroGradient.

November 27, 2012, 04:08		#5
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	thank you treima But I think velocity should read from outside of the grid domain.due to characteristic law you may know that tell at inlet 5 property should be assigned from out and only 1 from inside the domain and vice at outlet for stability of solution. But velocity have 3 components But ill examine your good suggestion if it didn't have stability problem all is ok. Thanks.