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-   -   Question about PISO (http://www.cfd-online.com/Forums/openfoam-solving/59056-question-about-piso.html)

kar February 16, 2008 15:10

Hi, I'm trying to understand
 
Hi,
I'm trying to understand p-U coupling, but have no idea how to obtain initial PISO equation a_p U_p = H(U) - grad(p) from momentum PDE. Please, could you explain?

K.

alberto February 17, 2008 01:23

Here you find some note and re
 
Here you find some note and reference:

http://openfoamwiki.net/index.php/Th...hm_in_OpenFOAM

http://openfoamwiki.net/index.php/Th...hm_in_OpenFOAM

Regards,
Alberto

kar February 17, 2008 05:09

I was looking there already an
 
I was looking there already and that doesn't answers my question. I'd like to start with theoretical explanation rather than looking through code files!

Thanks to Harvoje for making his thesis publicly available and full of useful information, but I'm missing explanation how equation 3.136 is introduced.

stephan February 17, 2008 06:09

hi, this paper helped me a
 
hi,

this paper helped me a lot, so maybe it's nice for you too?!:
Issa, "Solution of the implitly Discretised fluid flow equation by operator splittiing" in J. of Comp. Phys. No. 62, 1985, S. 40-65
there is another one about bouyant flow which might be interesting too..
br
stephan

kar February 17, 2008 06:41

It probably would be nice, if
 
It probably would be nice, if I could access it online... Since most of these articles are not for free, most likely I can't.
But thank you anyway!

jaswi February 17, 2008 06:53

Hi Karlis Send me an email.
 
Hi Karlis

Send me an email. I have this paper.

Kind Regards
Jaswi

lgriffiths March 10, 2008 10:29

another good paper on PISO is:
 
another good paper on PISO is:

"The computation of compressible and incompressible recirculating flows by a non-interactive implicit scheme"

Journal of computational physics
1986
vol.62 pp66-82

it appears directly after the previously mentioned paper by ISSA, covers the application of piso.


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