CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > Phoenics

Storage Location in phi file

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   March 9, 2009, 09:41
Default Storage Location in phi file
David Sumners
Posts: n/a

I am using a staggered grid (default in CARTs) and was interested to know what information is passed to the phi file at the end of the computation? In a staggered grid the velocity is stored at the cell face and the pressure at the cell centre...

..if the data is stored at the cell centre then this must be some sort of average. In this case, does anyone know how this is calculated and if it is possible to output data from the cell face?

Thanks in advance

  Reply With Quote

Old   March 12, 2009, 06:28
Default Re: Storage Location in phi file
Posts: n/a
I am not sure if I understand your question. For the default staggered grid, PHOENICS writes the nodal pressures and cell-face velocities to the PHI file.
  Reply With Quote

Old   March 13, 2009, 10:06
Default Re: Storage Location in phi file
David Sumners
Posts: n/a
Thanks for your response; yes this is what I was asking. I was under the impression that the outputted data was co-located. In this case, I have a further question:

For a NX*NY*NZ mesh, there are NX*NY*NZ pressure nodes (at the centre) and (NX+1)*(NY+1)*(NZ+1) velocity faces. The output in phi is an NX*NY*NZ array. For a given cell, pressure p is solved and stored at the cell centre. In 2-D; represneting the vertical and primary velocity through the cell as Ws/Wn (south and north face) and Ue/Uw (east and west face) respectively. Which velocity is stored to the same array location that corosponds to the pressure node p at the centre once saved to phi?

It would make sense that Ue and Wn is stored for the active cell but I would like confirmation of this.

  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Monitor file location K. Jagus FLUENT 3 January 17, 2006 02:29
Problem with storage.h Pifou74 FLUENT 0 February 25, 2005 09:48
Data Storage Tommaso Lucchini (Lucchini) OpenFOAM Running, Solving & CFD 1 January 25, 2005 10:17
Changing location of PHI-file Olof Liungman Phoenics 4 February 7, 2004 06:21
why i can not provide a storage for EP dong liu Phoenics 1 October 4, 2001 03:41

All times are GMT -4. The time now is 21:24.