ZouHeDynamics::DensityType
ZouHeDynamics::calcDensity(DataType& data, const VelocityType& velocity) const noexcept
{
const auto center = sumValues(data, CENTER_RHO.at(m_position));
const auto known = sumValues(data, KNOWN_RHO.at(m_position));
const auto velP = velocity.dot(VELOCITIES.at(m_position));
const auto wHs = Descriptor::getSplitCoefficient();
return (center + 2.0 * known) / (wHs - velP);
}
ZouHeDynamics::VelocityType
ZouHeDynamics::calcVelocity(DataType& data, DensityType rho) const noexcept
{
const auto center = sumValues(data, CENTER_RHO.at(m_position));
const auto known = sumValues(data, KNOWN_RHO.at(m_position));
const auto wHs = Descriptor::getSplitCoefficient();
const RealType speed = wHs - (1.0 / rho * (center + 2.0 * known));
// Velocity vector
return speed * VELOCITIES.at(m_position);
}
bool checkLTSumConsistency(LinearTermPtr a, LinearTermPtr b, DofOrderingPtr dofOrdering, BasisCachePtr basisCache)
{
double tol = 1e-14;
int numCells = basisCache->cellIDs().size();
int numDofs = dofOrdering->totalDofs();
bool forceBoundaryTerm = false;
FieldContainer<double> aValues(numCells,numDofs), bValues(numCells,numDofs), sumValues(numCells,numDofs);
a->integrate(aValues,dofOrdering,basisCache,forceBoundaryTerm);
b->integrate(bValues,dofOrdering,basisCache,forceBoundaryTerm);
(a+b)->integrate(sumValues, dofOrdering, basisCache, forceBoundaryTerm);
int size = aValues.size();
for (int i=0; i<size; i++)
{
double expectedValue = aValues[i] + bValues[i];
double diff = abs( expectedValue - sumValues[i] );
if (diff > tol)
{
return false;
}
}
return true;
}
