Define patch order for cyclic BC

maddalena · September 15, 2010, 11:21

Hi everyone,
as I discussed in this post, there are some kind of applications where the order patches are defined is important, as for example for using fan BC.
While defining the "master" and "slave" (or the "main" and "shadow", if you like) patches is simple if using blockMeshDict, it seems to me that this is a bit tricky if using createPatchDict. Changing the separationVector or the patch definition order does not do the job, at least for what I have experienced so far.
The question is: how can I define them properly? Where I should specify the master and the slave patch?
Thank you for any suggestion. Regards,

mad

mvoss · November 19, 2010, 09:51

hi,
i´m facing the exact same problem. since i am also using createPatchDict afaik the offsetvector there needs to be positive... leading to a strict order of the chosen faces for the "patches". For neg. values the solver is crashing no matter which order of faces/patches/sets i choose EVEN if they would be correct regarding the negative offsetvector.

neewbie

September 15, 2010, 11:21	Define patch order for cyclic BC	#1
maddalena Senior Member maddalena Join Date: Mar 2009 Posts: 436 Rep Power: 23	Hi everyone, as I discussed in this post, there are some kind of applications where the order patches are defined is important, as for example for using fan BC. While defining the "master" and "slave" (or the "main" and "shadow", if you like) patches is simple if using blockMeshDict, it seems to me that this is a bit tricky if using createPatchDict. Changing the separationVector or the patch definition order does not do the job, at least for what I have experienced so far. The question is: how can I define them properly? Where I should specify the master and the slave patch? Thank you for any suggestion. Regards, mad

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November 19, 2010, 09:51		#2
mvoss Senior Member Matthias Voß Join Date: Mar 2009 Location: Berlin, Germany Posts: 449 Rep Power: 20	hi, i´m facing the exact same problem. since i am also using createPatchDict afaik the offsetvector there needs to be positive... leading to a strict order of the chosen faces for the "patches". For neg. values the solver is crashing no matter which order of faces/patches/sets i choose EVEN if they would be correct regarding the negative offsetvector. neewbie