# SIMPLE algorithm

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 May 16, 2013, 05:36 SIMPLE algorithm #1 New Member   sina gilassi Join Date: May 2013 Posts: 17 Rep Power: 5 I read An Introduction to Computational Fluid Dynamics: The Finite Volume Method (first edition), in page 147, could you explain me about step 4??

 May 16, 2013, 05:51 #2 Senior Member     Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 19 Please tell us the name of the chapter and section / subsection. Meantime the second edition is on the market sinagilassi likes this. __________________ The skeleton ran out of shampoo in the shower.

 May 16, 2013, 06:38 #3 Senior Member   Join Date: Dec 2011 Location: Madrid, Spain Posts: 134 Rep Power: 7 Hi, the step 4 tells you to update the solution of any other transport equation you might want to solve using the corrected values of pressure and velocity. These additional equations can be the transport of, for instance, temperature or a scalar. Cheers, Michujo. sinagilassi likes this.

 May 16, 2013, 06:55 #4 New Member   sina gilassi Join Date: May 2013 Posts: 17 Rep Power: 5 Dear michujo, thank you very much, now i breath normally 2 days i am thinking about step 4

May 16, 2013, 06:56
#5
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sina gilassi
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Quote:
 Originally Posted by RodriguezFatz Please tell us the name of the chapter and section / subsection. Meantime the second edition is on the market
first edition, i haven't read second edition.

May 16, 2013, 06:59
#6
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Philipp
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Quote:
 Originally Posted by sinagilassi first edition, i haven't read second edition.
That's why I was asking the name of chapter / section and subsection, so also people with the second edition are able to help you...
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May 16, 2013, 07:25
#7
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sina gilassi
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Quote:
 Originally Posted by michujo Hi, the step 4 tells you to update the solution of any other transport equation you might want to solve using the corrected values of pressure and velocity. These additional equations can be the transport of, for instance, temperature or a scalar. Cheers, Michujo.
dear Michujo,

i can ignore this step, because i just need the velocity and flow direction?

May 16, 2013, 07:27
#8
New Member

sina gilassi
Join Date: May 2013
Posts: 17
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Quote:
 Originally Posted by RodriguezFatz That's why I was asking the name of chapter / section and subsection, so also people with the second edition are able to help you...
honestly, this is the first time i want to solve simple algorithm and i have many question specially about the p star guess, the number of p star must equal to the number of nodes?

 May 16, 2013, 10:09 #9 Senior Member   Join Date: Dec 2011 Location: Madrid, Spain Posts: 134 Rep Power: 7 Hi. 1) Yes, if you're only solving for pressure and velocity then you can ignore step 4. 2) pstar is defined in each cell so you have as many pstar values as cells in your domain. I would also recommend having a look at the second edition of Versteeg to be a little bit more up to date. Also there are interesting additional sections on combustion and radiation. Cheers, Michujo. sinagilassi likes this.

May 16, 2013, 10:11
#10
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Philipp
Join Date: Jun 2011
Location: Germany
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Quote:
 Originally Posted by michujo I would also recommend having a look at the second edition of Versteeg to be a little bit more up to date.
That wasn't what I was trying to say. I just wanted to know the chapter.. name so I can have a look in my own book.
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 May 16, 2013, 11:15 #11 Senior Member   Join Date: Dec 2011 Location: Madrid, Spain Posts: 134 Rep Power: 7 Hi, I don't have the second edition right now with me, but in the first edition I looked at the scheme of the SIMPLE algorithm in section 6. I guess you will find the exact same figure in the 2nd edition. Cheers, Michujo. sinagilassi likes this.

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