# A question about Jasak's Phd thesis

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

May 23, 2013, 23:51
A question about Jasak's Phd thesis
#1
Senior Member

Dongyue Li
Join Date: Jun 2012
Location: Torino, Italy
Posts: 742
Rep Power: 9
Hi guys,

In Jasak's thesis Page 144.It says: (see the image equation 1 2 3).I dont know how can I get equation 3 from equation 2.
AFAIK,in SIMPLE algorithm,I can get equations similarly(from eq.4 to eq.5).So back to Jasak's thesis , should it be equation 6?Where is the diffusion term in his thesis?

Attached Images
 1.jpg (59.6 KB, 57 views)

 May 24, 2013, 07:40 #2 Senior Member   Paulo Vatavuk Join Date: Mar 2009 Location: Campinas, Brasil Posts: 138 Rep Power: 9 Hi Forrest, I think that what Dr. Jasak means is that the convection term can be calculated from the sum of the flow times velocity at the faces, and that will result in a contribution to ap and the an's, how this contribution will be effectively calculated depends on the convection scheme that is used. Best Regards, Paulo

May 26, 2013, 23:19
#3
Senior Member

Dongyue Li
Join Date: Jun 2012
Location: Torino, Italy
Posts: 742
Rep Power: 9
Quote:
 Originally Posted by vatavuk Hi Forrest, I think that what Dr. Jasak means is that the convection term can be calculated from the sum of the flow times velocity at the faces, and that will result in a contribution to ap and the an's, how this contribution will be effectively calculated depends on the convection scheme that is used. Best Regards, Paulo
Hi Paulo,

Attached Images
 1.jpg (62.3 KB, 18 views)

 May 27, 2013, 06:36 #4 Senior Member   Paulo Vatavuk Join Date: Mar 2009 Location: Campinas, Brasil Posts: 138 Rep Power: 9 Hi Forrest, The diffusive term certainly have an influence that must be included in ap and the an's. The ap and the an's from equation 3 of your first post are not the same as the ones in the third eq of your second post. The equations 1, 2 and 3 of your first post are for an hypothetical situation for steady flow without diffusion and other sources. Best Regards, Paulo Last edited by vatavuk; May 28, 2013 at 06:17. Reason: small typos

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post niklas OpenFOAM 2 July 31, 2013 16:03 hawk Main CFD Forum 5 February 4, 2012 14:53 mer OpenFOAM Running, Solving & CFD 1 January 8, 2006 15:38 leosding OpenFOAM Running, Solving & CFD 6 August 28, 2005 09:44 FVSuppe Main CFD Forum 5 July 8, 2002 02:31

All times are GMT -4. The time now is 18:11.