RIPPLE's free surface boundary condition

alongalong2 · February 6, 2011, 04:26

In SOLA-VOF's code,the pressure in surface cell is interpolated by neighbouring fluid cell with a variable 'PETA'. In RIPPLE, a improved method 'CSF' replaces the free surface pressure condition, and i cannot find 'PETA' again.
My question is:does RIPPLE still use interpolation to obtain pressure in surface cells? if not, how can i get it?

Thanks.

ves · February 7, 2011, 16:13

See http://math.rug.nl/~veldman/publications
DeJong-afstudeerferslag.pdf and other articles and dissertation.
if you have RIPPLE source code please send it to me.
My e-mail: vs198080@mail.ru.
I am try understand pressure boundary condition.
I have SOLA-VOF, VOF-2D, VOF -3D source code.

alongalong2 · February 8, 2011, 08:28

Hi ves

Thank you for your reply. but i have no RIPPLE's code either, and your adress is invalid.

Along

ves · February 9, 2011, 14:11

http://www.math.rug.nl/~veldman/publications.html
This link is work. This page have links for aricles and PhD,
see Gerris PhD , Kleffsman PhD, and DeJong article.
It is explained pressure Poisson boundary condition for projection method solving Navier-Stokes equation (this metod used in RIPPLE). RIPPLE User Manual have not information about pressure boundary condition, but in above works used coefficient peta same as SOLA-VOF.
By means of this coefficient PETA coefficients of the Poisson equation are calculated.
I developed the software based on above works, SOLA-VOF, Veldman sample program (not free surface), but pressure calculation wrong. Why? I do not know.
Veldman page consist samle and lecture.

alongalong2 · February 10, 2011, 00:35

Ves
Thank you for your help.
This is my first time contact with Veldman sample program, what's the problom with your pressure calculation? can you tell me the detail?

Along

February 6, 2011, 04:26	RIPPLE's free surface boundary condition	#1
alongalong2 New Member Cheng Zhang Join Date: Oct 2009 Posts: 11 Rep Power: 17	In SOLA-VOF's code,the pressure in surface cell is interpolated by neighbouring fluid cell with a variable 'PETA'. In RIPPLE, a improved method 'CSF' replaces the free surface pressure condition, and i cannot find 'PETA' again. My question is:does RIPPLE still use interpolation to obtain pressure in surface cells? if not, how can i get it? Thanks.

February 7, 2011, 16:13	boundary condition	#2
ves Member Veskov Eugene Join Date: Feb 2011 Posts: 31 Rep Power: 15	See http://math.rug.nl/~veldman/publications DeJong-afstudeerferslag.pdf and other articles and dissertation. if you have RIPPLE source code please send it to me. My e-mail: vs198080@mail.ru. I am try understand pressure boundary condition. I have SOLA-VOF, VOF-2D, VOF -3D source code.

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February 8, 2011, 08:28		#3
alongalong2 New Member Cheng Zhang Join Date: Oct 2009 Posts: 11 Rep Power: 17	Hi ves Thank you for your reply. but i have no RIPPLE's code either, and your adress is invalid. Along

February 9, 2011, 14:11		#4
ves Member Veskov Eugene Join Date: Feb 2011 Posts: 31 Rep Power: 15	http://www.math.rug.nl/~veldman/publications.html This link is work. This page have links for aricles and PhD, see Gerris PhD , Kleffsman PhD, and DeJong article. It is explained pressure Poisson boundary condition for projection method solving Navier-Stokes equation (this metod used in RIPPLE). RIPPLE User Manual have not information about pressure boundary condition, but in above works used coefficient peta same as SOLA-VOF. By means of this coefficient PETA coefficients of the Poisson equation are calculated. I developed the software based on above works, SOLA-VOF, Veldman sample program (not free surface), but pressure calculation wrong. Why? I do not know. Veldman page consist samle and lecture.

February 10, 2011, 00:35		#5
alongalong2 New Member Cheng Zhang Join Date: Oct 2009 Posts: 11 Rep Power: 17	Ves Thank you for your help. This is my first time contact with Veldman sample program, what's the problom with your pressure calculation? can you tell me the detail? Along