void Foam::solidParticle::hitWallPatch
(
const wallPolyPatch& wpp,
solidParticle::trackData& td
)
{
vector nw = wpp.faceAreas()[wpp.whichFace(face())];
nw /= mag(nw);
scalar Un = U_ & nw;
vector Ut = U_ - Un*nw;
if (Un > 0)
{
U_ -= (1.0 + td.spc().e())*Un*nw;
}
U_ -= td.spc().mu()*Ut;
}
void Foam::SpecularReflection<CloudType>::correct
(
const wallPolyPatch& wpp,
const label faceId,
vector& U,
scalar& Ei,
label typeId
)
{
vector nw = wpp.faceAreas()[wpp.whichFace(faceId)];
nw /= mag(nw);
scalar magUn = U & nw;
if (magUn > 0.0)
{
U -= 2.0*magUn*nw;
}
}
void Foam::StandardWallInteraction<CloudType>::correct
(
const wallPolyPatch& wpp,
const label faceId,
vector& U
) const
{
vector nw = wpp.faceAreas()[wpp.whichFace(faceId)];
nw /= mag(nw);
scalar Un = U & nw;
vector Ut = U - Un*nw;
if (Un > 0)
{
U -= (1.0 + e_)*Un*nw;
}
U -= mu_*Ut;
}
void Foam::MaxwellianThermal<CloudType>::correct
(
typename CloudType::parcelType& p,
const wallPolyPatch& wpp
)
{
vector& U = p.U();
scalar& Ei = p.Ei();
label typeId = p.typeId();
label wppIndex = wpp.index();
label wppLocalFace = wpp.whichFace(p.face());
vector nw = p.normal();
nw /= mag(nw);
// Normal velocity magnitude
scalar U_dot_nw = U & nw;
// Wall tangential velocity (flow direction)
vector Ut = U - U_dot_nw*nw;
CloudType& cloud(this->owner());
Random& rndGen(cloud.rndGen());
while (mag(Ut) < SMALL)
{
// If the incident velocity is parallel to the face normal, no
// tangential direction can be chosen. Add a perturbation to the
// incoming velocity and recalculate.
U = vector
(
U.x()*(0.8 + 0.2*rndGen.scalar01()),
U.y()*(0.8 + 0.2*rndGen.scalar01()),
U.z()*(0.8 + 0.2*rndGen.scalar01())
);
U_dot_nw = U & nw;
Ut = U - U_dot_nw*nw;
}
// Wall tangential unit vector
vector tw1 = Ut/mag(Ut);
// Other tangential unit vector
vector tw2 = nw^tw1;
scalar T = cloud.boundaryT().boundaryField()[wppIndex][wppLocalFace];
scalar mass = cloud.constProps(typeId).mass();
scalar iDof = cloud.constProps(typeId).internalDegreesOfFreedom();
U =
sqrt(physicoChemical::k.value()*T/mass)
*(
rndGen.GaussNormal()*tw1
+ rndGen.GaussNormal()*tw2
- sqrt(-2.0*log(max(1 - rndGen.scalar01(), VSMALL)))*nw
);
U += cloud.boundaryU().boundaryField()[wppIndex][wppLocalFace];
Ei = cloud.equipartitionInternalEnergy(T, iDof);
}
void Foam::DsmcParcel<ParcelType>::hitWallPatch
(
const wallPolyPatch& wpp,
TrackData& td,
const tetIndices& tetIs
)
{
label wppIndex = wpp.index();
label wppLocalFace = wpp.whichFace(this->face());
const scalar fA = mag(wpp.faceAreas()[wppLocalFace]);
const scalar deltaT = td.cloud().pMesh().time().deltaTValue();
const constantProperties& constProps(td.cloud().constProps(typeId_));
scalar m = constProps.mass();
vector nw = wpp.faceAreas()[wppLocalFace];
nw /= mag(nw);
scalar U_dot_nw = U_ & nw;
vector Ut = U_ - U_dot_nw*nw;
scalar invMagUnfA = 1/max(mag(U_dot_nw)*fA, VSMALL);
td.cloud().rhoNBF()[wppIndex][wppLocalFace] += invMagUnfA;
td.cloud().rhoMBF()[wppIndex][wppLocalFace] += m*invMagUnfA;
td.cloud().linearKEBF()[wppIndex][wppLocalFace] +=
0.5*m*(U_ & U_)*invMagUnfA;
td.cloud().internalEBF()[wppIndex][wppLocalFace] += Ei_*invMagUnfA;
td.cloud().iDofBF()[wppIndex][wppLocalFace] +=
constProps.internalDegreesOfFreedom()*invMagUnfA;
td.cloud().momentumBF()[wppIndex][wppLocalFace] += m*Ut*invMagUnfA;
// pre-interaction energy
scalar preIE = 0.5*m*(U_ & U_) + Ei_;
// pre-interaction momentum
vector preIMom = m*U_;
td.cloud().wallInteraction().correct
(
static_cast<DsmcParcel<ParcelType> &>(*this),
wpp
);
U_dot_nw = U_ & nw;
Ut = U_ - U_dot_nw*nw;
invMagUnfA = 1/max(mag(U_dot_nw)*fA, VSMALL);
td.cloud().rhoNBF()[wppIndex][wppLocalFace] += invMagUnfA;
td.cloud().rhoMBF()[wppIndex][wppLocalFace] += m*invMagUnfA;
td.cloud().linearKEBF()[wppIndex][wppLocalFace] +=
0.5*m*(U_ & U_)*invMagUnfA;
td.cloud().internalEBF()[wppIndex][wppLocalFace] += Ei_*invMagUnfA;
td.cloud().iDofBF()[wppIndex][wppLocalFace] +=
constProps.internalDegreesOfFreedom()*invMagUnfA;
td.cloud().momentumBF()[wppIndex][wppLocalFace] += m*Ut*invMagUnfA;
// post-interaction energy
scalar postIE = 0.5*m*(U_ & U_) + Ei_;
// post-interaction momentum
vector postIMom = m*U_;
scalar deltaQ = td.cloud().nParticle()*(preIE - postIE)/(deltaT*fA);
vector deltaFD = td.cloud().nParticle()*(preIMom - postIMom)/(deltaT*fA);
td.cloud().qBF()[wppIndex][wppLocalFace] += deltaQ;
td.cloud().fDBF()[wppIndex][wppLocalFace] += deltaFD;
}
