zhyang-dev/OpenFOAM-6
1
0
Fork 0
mirror of https://github.com/OpenFOAM/OpenFOAM-6.git synced 2025-12-08 06:57:46 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

*EulerFoam/interfacialModels/dragModels/IshiiZuber: Set constants to correspond to original paper

Browse Source 
"Drag Coefficient and relative velocity in bubbly, droplet and
         particulate flows",
        Ishii, M., Zuber, N.,
        AIChE Journal 5, Vol. 25, 1979, pp. 843-855.
This commit is contained in:
Henry Weller
2018-06-14 20:09:58 +01:00
parent ee6a53adee
commit 4a46fab1ba
2 changed files with 25 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
applications/solvers/multiphase/reactingEulerFoam/interfacialModels/dragModels/IshiiZuber/IshiiZuber.C
View File

@ -63,33 +63,32 @@ Foam::dragModels::IshiiZuber::~IshiiZuber()
Foam::tmp<Foam::volScalarField>
Foam::dragModels::IshiiZuber::CdRe() const
{
volScalarField Re(pair_.Re());
volScalarField Eo(pair_.Eo());
const volScalarField Re(pair_.Re());
const volScalarField Eo(pair_.Eo());
volScalarField mud(pair_.dispersed().mu());
volScalarField muc(pair_.continuous().mu());
const volScalarField mud(pair_.dispersed().mu());
const volScalarField muc(pair_.continuous().mu());
volScalarField muStar((mud + 0.4*muc)/(mud + muc));
const volScalarField muStar((mud + 0.4*muc)/(mud + muc));
volScalarField muMix
const volScalarField muMix
(
muc
*pow(max(1 - pair_.dispersed(), scalar(1e-3)), -2.5*muStar)
muc*pow(max(1 - pair_.dispersed(), scalar(1e-3)), -2.5*muStar)
);
volScalarField ReM(Re*muc/muMix);
volScalarField CdRe
const volScalarField ReM(Re*muc/muMix);
const volScalarField CdRe
(
pos0(1000 - ReM)*24*(scalar(1) + 0.15*pow(ReM, 0.687))
pos0(1000 - ReM)*24*(scalar(1) + 0.1*pow(ReM, 0.75))
+ neg(1000 - ReM)*0.44*ReM
);
volScalarField F((muc/muMix)*sqrt(1 - pair_.dispersed()));
F.max(1e-3);
volScalarField Ealpha((1 + 17.67*pow(F, 0.8571428))/(18.67*F));
const volScalarField Ealpha((1 + 17.67*pow(F, 0.8571428))/(18.67*F));
volScalarField CdReEllipse(Ealpha*0.6666*sqrt(Eo)*Re);
const volScalarField CdReEllipse(Ealpha*0.6666*sqrt(Eo)*Re);
return
pos0(CdReEllipse - CdRe)

27
applications/solvers/multiphase/twoPhaseEulerFoam/interfacialModels/dragModels/IshiiZuber/IshiiZuber.C
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2014-2017 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2014-2018 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -63,33 +63,32 @@ Foam::dragModels::IshiiZuber::~IshiiZuber()
Foam::tmp<Foam::volScalarField>
Foam::dragModels::IshiiZuber::CdRe() const
{
volScalarField Re(pair_.Re());
volScalarField Eo(pair_.Eo());
const volScalarField Re(pair_.Re());
const volScalarField Eo(pair_.Eo());
volScalarField mud(pair_.dispersed().mu());
volScalarField muc(pair_.continuous().mu());
const volScalarField mud(pair_.dispersed().mu());
const volScalarField muc(pair_.continuous().mu());
volScalarField muStar((mud + 0.4*muc)/(mud + muc));
const volScalarField muStar((mud + 0.4*muc)/(mud + muc));
volScalarField muMix
const volScalarField muMix
(
muc
*pow(max(1 - pair_.dispersed(), scalar(1e-3)), -2.5*muStar)
muc*pow(max(1 - pair_.dispersed(), scalar(1e-3)), -2.5*muStar)
);
volScalarField ReM(Re*muc/muMix);
volScalarField CdRe
const volScalarField ReM(Re*muc/muMix);
const volScalarField CdRe
(
pos0(1000 - ReM)*24.0*(scalar(1) + 0.15*pow(ReM, 0.687))
pos0(1000 - ReM)*24*(scalar(1) + 0.1*pow(ReM, 0.75))
+ neg(1000 - ReM)*0.44*ReM
);
volScalarField F((muc/muMix)*sqrt(1 - pair_.dispersed()));
F.max(1e-3);
volScalarField Ealpha((1 + 17.67*pow(F, 0.8571428))/(18.67*F));
const volScalarField Ealpha((1 + 17.67*pow(F, 0.8571428))/(18.67*F));
volScalarField CdReEllipse(Ealpha*0.6666*sqrt(Eo)*Re);
const volScalarField CdReEllipse(Ealpha*0.6666*sqrt(Eo)*Re);
return
pos0(CdReEllipse - CdRe)