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BrownianMotionForce: Removed the spurious additional 'eta'

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Resolves bug-report http://bugs.openfoam.org/view.php?id=2153
This commit is contained in:
Henry Weller 2016-07-22 21:12:09 +01:00
parent 2915e6ba19
commit 96645225ed
1 changed files with 3 additions and 4 deletions
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7
src/lagrangian/turbulence/submodels/Thermodynamic/ParticleForces/BrownianMotion/BrownianMotionForce.C
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@ -171,7 +171,6 @@ Foam::forceSuSp Foam::BrownianMotionForce<CloudType>::calcCoupled
const scalar dp = p.d();
const scalar Tc = p.Tc();
const scalar eta = rndGen_.sample01<scalar>();
const scalar alpha = 2.0*lambda_/dp;
const scalar cc = 1.0 + alpha*(1.257 + 0.4*exp(-1.1/alpha));
@ -185,13 +184,13 @@ Foam::forceSuSp Foam::BrownianMotionForce<CloudType>::calcCoupled
const volScalarField& k = *kPtr_;
const scalar kc = k[celli];
const scalar Dp = kb*Tc*cc/(3*mathematical::pi*muc*dp);
f = eta/mass*sqrt(2.0*sqr(kc)*sqr(Tc)/(Dp*dt));
f = sqrt(2.0*sqr(kc)*sqr(Tc)/(Dp*dt));
}
else
{
const scalar s0 =
216*muc*kb*Tc/(sqr(mathematical::pi)*pow5(dp)*sqr(p.rho())*cc);
f = eta*sqrt(mathematical::pi*s0/dt);
f = mass*sqrt(mathematical::pi*s0/dt);
}
const scalar sqrt2 = sqrt(2.0);
@ -199,7 +198,7 @@ Foam::forceSuSp Foam::BrownianMotionForce<CloudType>::calcCoupled
{
const scalar x = rndGen_.sample01<scalar>();
const scalar eta = sqrt2*erfInv(2*x - 1.0);
value.Su()[dir] = mass*f*eta;
value.Su()[dir] = f*eta;
}
return value;