Patankar's cyclic TDMA

March 19, 2006, 19:55

Hi everybody! Does anybody has the subroutine of the cyclic TDMA of Patankar?Can you send me it? Thank you in advance

March 20, 2006, 20:17

Or any other subroutine concerning cyclic or periodic boundary conditions...

March 20, 2006, 22:40

Hi, If it is TriaDiagonalMatrixAlgoritm, you can find it Numerical Recipies in FORTRAN or Numerical Recipies in C.

March 21, 2006, 02:55

i have a TDMA subroutine. but what you mean by cyclic. if it is a slice from axisymetric 360 degrees. please explain it.

March 21, 2006, 11:49

Yes, it is a TriaDiagonalMatrixAlgoritm.But if there are cyclic or periodic boundary conditions in the flow, then there is a different version.I am trying to change it, but I have some problems. For Ali Mottalea: It is not axisymmetric, it is full 3D cylindrical flow.

March 21, 2006, 14:08

ok. then as i know your coordinate system is cylindrical and in teta=0 and 360 you have cyclic condition. is it true?

March 21, 2006, 19:10

Yes. And you must change a little bit the original TDMA, so that you can take into consideration this difference in the usual boundary conditions

March 22, 2006, 10:18

For symmetric tridiagonal matrices (diagonally dominant) you can give a look here:

http://www-dinma.units.it/nirftc/research/cyctrid/

March 19, 2006, 19:55	Patankar's cyclic TDMA	#1
George Guest Posts: n/a	Hi everybody! Does anybody has the subroutine of the cyclic TDMA of Patankar?Can you send me it? Thank you in advance

March 20, 2006, 20:17	Re: Patankar's cyclic TDMA	#2
George Guest Posts: n/a	Or any other subroutine concerning cyclic or periodic boundary conditions...

March 20, 2006, 22:40	Re: Patankar's cyclic TDMA	#3
Manish Guest Posts: n/a	Hi, If it is TriaDiagonalMatrixAlgoritm, you can find it Numerical Recipies in FORTRAN or Numerical Recipies in C.

March 21, 2006, 02:55	Re: Patankar's cyclic TDMA	#4
ali mottalea Guest Posts: n/a	i have a TDMA subroutine. but what you mean by cyclic. if it is a slice from axisymetric 360 degrees. please explain it.

March 21, 2006, 11:49	Re: Patankar's cyclic TDMA	#5
George Guest Posts: n/a	Yes, it is a TriaDiagonalMatrixAlgoritm.But if there are cyclic or periodic boundary conditions in the flow, then there is a different version.I am trying to change it, but I have some problems. For Ali Mottalea: It is not axisymmetric, it is full 3D cylindrical flow.

March 21, 2006, 14:08	Re: Patankar's cyclic TDMA	#6
ali mottalea Guest Posts: n/a	ok. then as i know your coordinate system is cylindrical and in teta=0 and 360 you have cyclic condition. is it true?

March 21, 2006, 19:10	Re: Patankar's cyclic TDMA	#7
George Guest Posts: n/a	Yes. And you must change a little bit the original TDMA, so that you can take into consideration this difference in the usual boundary conditions

March 22, 2006, 10:18	Re: Patankar's cyclic TDMA	#8
Enrico Guest Posts: n/a	For symmetric tridiagonal matrices (diagonally dominant) you can give a look here: http://www-dinma.units.it/nirftc/research/cyctrid/

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