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October 4, 2010, 09:17 
On the PIMPLE algorithm

#1 
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Vesselin Krastev
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Hi all, can someone give me some brief explanation (or at least some bibliografical reference) about how the PIMPLE algorithm works (namely how the "merging" between the PISO and SIMPLE algorithms is accomplished)?
Thank you in advance V. 

October 4, 2010, 10:40 

#2 
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Vesselin Krastev
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Any replies?


April 16, 2012, 09:12 

#3 
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Gilles De Neyer
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Hello,
Did you get some informations about this ? I'm also interested in the way Pimple algorithm works, especially for compressible flow ! Is there a paper speaking about this ? Thank you, Gilles 

April 16, 2012, 09:42 

#4  
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Vesselin Krastev
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Quote:
So, to better understand the algorithm, I suggest you to get familiar (if you are still not) with pressurecorrection algorithms (a good reading about this should be Patankar's book "Numerical Heat Transfer and Fluid Flow") and after that to focus on the PISO one (it is described in many CFD books, but my advice is to start from Issa's original paper "Solution of the Implicitly Discretised Fluid Flow Equations by OperatorSplitting", which should be freely available in the open literature) Hope this helps V. 

April 16, 2012, 10:14 

#5 
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Gilles De Neyer
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thank you for your answer,
I've already read several docs about PISO algorithm in which the Phd thesis of Professor Jasak and the Jerziger. I think I know understand well this procedure. What concerns me is that the PISO algorithm uses the continuity equation to compute an equation for pressure and I don't know exactly how this apply for compressible flows (as in rhoPimpleFoam) as the continuity equation involve rho and the energy equation is now coupled to the others. 

April 16, 2012, 10:54 

#6  
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Vesselin Krastev
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Quote:
Regards V. 

April 16, 2012, 10:59 

#7 
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Gilles De Neyer
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thank you again Mr Vesselin Krastev, I understand the methodology even if it is unclear to me how we should decide the order of processing the equations (velocity, energy, pressure, ...) I m gonna look deeper in the implementation of rhoPimpleFoam for details.


April 16, 2012, 11:13 

#8  
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Vesselin Krastev
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Location: University of Tor Vergata, Rome
Posts: 368
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Quote:
Regards V. 

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