
[Sponsors] 
March 20, 2013, 04:19 
Explanation of flux() method

#1 
Senior Member
Fumiya Nozaki
Join Date: Jun 2010
Location: Yokohama, Japan
Posts: 238
Blog Entries: 1
Rep Power: 14 
I try to describe the role of flux() method and how it achieves it's role in OpenFOAM.
This topic is difficult for me to comprehend, so I'm grad if the following explanations could be of some help
Please correct the mistakes, if any. Best regards, Fumiya Last edited by fumiya; March 21, 2013 at 10:09. 

August 25, 2013, 23:40 

#2  
Senior Member
Dongyue Li
Join Date: Jun 2012
Location: Beijing, China
Posts: 775
Rep Power: 13 
Quote:
BTW, do you think Code:
fvScalarMatrix pEqn ( fvm::laplacian(rAU, p) == fvc::div(phiHbyA) ); fvScalarMatrix pEqn ( fvm::div(A*fvc::grad(p)) == fvc::div(phiHbyA) ); 

December 21, 2016, 10:39 

#3 
New Member
longyun wang
Join Date: Dec 2016
Posts: 6
Rep Power: 5 
Quote:
I am studing icofoam now, and I found the code: [/CODE] 77 surfaceScalarField phiHbyA 78 ( 79 "phiHbyA", 80 fvc::flux(HbyA) 81 + fvc::interpolate(rAU)*fvc::ddtCorr(U, phi) 82 ); [/CODE] I can't understand why there is an item "fvc::interpolate(rAU)*fvc::ddtCorr(U, phi)"? According to the equation above, there should be only the first item. 

December 24, 2016, 12:40 

#4 
Senior Member
Fumiya Nozaki
Join Date: Jun 2010
Location: Yokohama, Japan
Posts: 238
Blog Entries: 1
Rep Power: 14 
Hi,
The term "ddtCorr" is considered in the transient solvers. The following references could be of some help: Best regards, Fumiya
__________________


April 3, 2017, 20:36 

#5 
New Member
yuancong
Join Date: Sep 2016
Posts: 2
Rep Power: 0 
i do not think so. fvc::grad(p) returns a volscalarfield. so the second pEqn is actually based on grad(p).


January 2, 2018, 11:05 
Flux in 2D Model

#6 
Member
Join Date: May 2017
Posts: 44
Rep Power: 5 
Dear Foamers,
I am trying to add a source term to alpha using mass flux. I am starting with a circle and while using .flux(), I can see my circle changes to a square. I am wondering if .flux() can be used in 2D the same as 1D. Thanks, 

Thread Tools  Search this Thread 
Display Modes  


Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Sign of Heat Flux at wall  Kyung  FLUENT  2  February 26, 2016 16:25 
Comparison: Finite Volume Method vs. Analytic Method  mfry  Main CFD Forum  1  April 20, 2010 14:40 
About the Flux splitting method  maximus  Main CFD Forum  0  February 24, 2006 00:05 
Replace periodic by inletoutlet pair  lego  CFX  3  November 5, 2002 20:09 
total mass flux correction for compressible fluid?  Francesco Di Maio  Main CFD Forum  0  August 21, 2000 04:23 