# transportProperties settlingFoam

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

December 22, 2011, 11:34
transportProperties settlingFoam
#1
New Member

Jochem van den Bosch
Join Date: Oct 2011
Location: Rotterdam, The Netherlands
Posts: 20
Rep Power: 7
Dear all. I'm trying to simulate a slurry (sand/water) flow in a pipe using settlingFoam, but I'm unsure about different entries in the transportProperties file. I have gone through Daniel Brennans thesis on which settlingFoam is based but still have some question. I want the discrete phase to be sand (rho=2650) and the continuous phase to be water (rho=1000).

- Should I define 'yieldStressCoeff' 'yieldStressExponent' and 'yieldStressOffset' if I have Binghamplastic OFF? I suppose these values don't matter?

- What should I fill in for 'plasticViscosityCoeff' and 'plasticViscosityExponent?

- Could anyone give a clearification about the simpleCoeffs and generalCoeffs?

Quote:
 muc muc [ 1 -1 -1 0 0 0 0 ] 0.001; plasticViscosityCoeff plasticViscosityCoeff [ 1 -1 -1 0 0 0 0 ] 0; plasticViscosityExponent plasticViscosityExponent [ 0 0 0 0 0 0 0 ] 0; BinghamPlastic off; yieldStressCoeff yieldStressCoeff [ 1 -1 -2 0 0 0 0 ] 0; yieldStressExponent yieldStressExponent [ 0 0 0 0 0 0 0 ] 0; yieldStressOffset yieldStressOffset [ 0 0 0 0 0 0 0 ] 0; rhoc rhoc [ 1 -3 0 0 0 0 0 ] 1000; rhod rhod [ 1 -3 0 0 0 0 0 ] 2650; VdjModel simple; simpleCoeffs { V0 V0 [ 0 1 -1 0 0 0 0 ] ( 0 -0.002198 0 ); a a [ 0 0 0 0 0 0 0 ] 8.84; a1 a1 [ 0 0 0 0 0 0 0 ] 0; alphaMin alphaMin [ 0 0 0 0 0 0 0 ] 0; } generalCoeffs { V0 V0 [ 0 1 -1 0 0 0 0 ] ( 0 -0.0018 0 ); a a [ 0 0 0 0 0 0 0 ] 1e-05; a1 a1 [ 0 0 0 0 0 0 0 ] 0.1; alphaMin alphaMin [ 0 0 0 0 0 0 0 ] 2e-05; }

 December 23, 2011, 08:20 #2 Senior Member   Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,910 Rep Power: 28 You find the theory here: http://powerlab.fsb.hr/ped/kturbo/Op...BrennanPhD.pdf __________________ Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats. OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using.

 December 23, 2011, 08:37 #3 New Member   Jochem van den Bosch Join Date: Oct 2011 Location: Rotterdam, The Netherlands Posts: 20 Rep Power: 7 Hi Alberto, I've gone through Brennan's thesis, however I'm unsure what coefficients to chose for sand. And if I have to specify 'yieldStressCoeff' 'yieldStressExponent' and 'yieldStressOffset' if I have Binghamplastic OFF? Best regards,

 December 23, 2011, 08:44 #4 Senior Member   Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,910 Rep Power: 28 No, you do not need that. jochemvandenbosch likes this. __________________ Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats. OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using.

 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 klausb OpenFOAM Running, Solving & CFD 2 March 25, 2016 15:45 jochemvandenbosch OpenFOAM Running, Solving & CFD 4 February 16, 2012 04:24 NickolasPl Main CFD Forum 0 June 2, 2011 14:06 pramodopen4foam OpenFOAM 0 November 6, 2009 06:15 darrin OpenFOAM Running, Solving & CFD 0 February 28, 2007 05:51