Foam::scalar Foam::VirtualMassForce<CloudType>::massAdd
(
const typename CloudType::parcelType& p,
const scalar mass
) const
{
return mass*p.rhoc()/p.rho()*Cvm_;
}
Foam::forceSuSp Foam::GravityForce<CloudType>::calcNonCoupled
(
const typename CloudType::parcelType& p,
const scalar dt,
const scalar mass,
const scalar Re,
const scalar muc
) const
{
forceSuSp value(vector::zero, 0.0);
value.Su() = mass*g_*(1.0 - p.rhoc()/p.rho());
return value;
}
Foam::forceSuSp Foam::BrownianMotionForce<CloudType>::calcCoupled
(
const typename CloudType::parcelType& p,
const scalar dt,
const scalar mass,
const scalar Re,
const scalar muc
) const
{
forceSuSp value(vector::zero, 0.0);
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));
const scalar sigma = physicoChemical::sigma.value();
scalar f = 0.0;
if (turbulence_)
{
const label cellI = p.cell();
const volScalarField& k = *kPtr_;
const scalar kc = k[cellI];
const scalar Dp = sigma*Tc*cc/(3*mathematical::pi*muc*dp);
f = eta/mass*sqrt(2.0*sqr(kc)*sqr(Tc)/(Dp*dt));
}
else
{
const scalar rhoRatio = p.rho()/p.rhoc();
const scalar s0 =
216*muc*sigma*Tc/(sqr(mathematical::pi)*pow5(dp)*(rhoRatio)*cc);
f = eta*sqrt(mathematical::pi*s0/dt);
}
const scalar sqrt2 = sqrt(2.0);
for (label i = 0; i < 3; i++)
{
const scalar x = rndGen_.sample01<scalar>();
const scalar eta = sqrt2*erfInv(2*x - 1.0);
value.Su()[i] = mass*f*eta;
}
return value;
}
Foam::forceSuSp Foam::PressureGradientForce<CloudType>::calcCoupled
(
const typename CloudType::parcelType& p,
const scalar dt,
const scalar mass,
const scalar Re,
const scalar muc
) const
{
forceSuSp value(Zero, 0.0);
vector DUcDt =
DUcDtInterp().interpolate(p.position(), p.currentTetIndices());
value.Su() = mass*p.rhoc()/p.rho()*DUcDt;
return value;
}
Foam::forceSuSp Foam::LiftForce<CloudType>::calcCoupled
(
const typename CloudType::parcelType& p,
const scalar dt,
const scalar mass,
const scalar Re,
const scalar muc
) const
{
forceSuSp value(vector::zero, 0.0);
vector curlUc =
curlUcInterp().interpolate(p.position(), p.currentTetIndices());
scalar Cl = this->Cl(p, curlUc, Re, muc);
value.Su() = mass/p.rho()*p.d()/2.0*p.rhoc()*Cl*((p.Uc() - p.U())^curlUc);
return value;
}
Foam::forceSuSp Foam::SRFForce<CloudType>::calcNonCoupled
(
const typename CloudType::parcelType& p,
const scalar dt,
const scalar mass,
const scalar Re,
const scalar muc
) const
{
forceSuSp value(Zero, 0.0);
const typename SRF::SRFModel& srf = *srfPtr_;
const vector& omega = srf.omega().value();
const vector& r = p.position();
// Coriolis and centrifugal acceleration terms
value.Su() =
mass*(1.0 - p.rhoc()/p.rho())
*(2.0*(p.U() ^ omega) + (omega ^ (r ^ omega)));
return value;
}