/// @brief Computes total mobility and omega for a set of saturation values.
/// @param[in] props rock and fluid properties
/// @param[in] cells cells with which the saturation values are associated
/// @param[in] s saturation values (for all phases)
/// @param[out] totmob total mobility
/// @param[out] omega fractional-flow weighted fluid densities.
void computeTotalMobilityOmega(const Opm::IncompPropertiesInterface& props,
const std::vector<int>& cells,
const std::vector<double>& s,
std::vector<double>& totmob,
std::vector<double>& omega)
{
std::vector<double> pmobc;
computePhaseMobilities(props, cells, s, pmobc);
const std::size_t np = props.numPhases();
const std::vector<int>::size_type nc = cells.size();
std::vector<double>(cells.size(), 0.0).swap(totmob);
std::vector<double>(cells.size(), 0.0).swap(omega );
const double* rho = props.density();
for (std::vector<int>::size_type c = 0; c < nc; ++c) {
for (std::size_t p = 0; p < np; ++p) {
totmob[ c ] += pmobc[c*np + p];
omega [ c ] += pmobc[c*np + p] * rho[ p ];
}
omega[ c ] /= totmob[ c ];
}
}
/// @brief Computes total mobility and omega for a set of s/c values.
/// @param[in] props rock and fluid properties
/// @param[in] polyprops polymer properties
/// @param[in] cells cells with which the saturation values are associated
/// @param[in] s saturation values (for all phases)
/// @param[in] c polymer concentration
/// @param[out] totmob total mobility
/// @param[out] omega mobility-weighted (or fractional-flow weighted)
/// fluid densities.
void computeTotalMobilityOmega(const Opm::IncompPropertiesInterface& props,
const Opm::PolymerProperties& polyprops,
const std::vector<int>& cells,
const std::vector<double>& s,
const std::vector<double>& c,
const std::vector<double>& cmax,
std::vector<double>& totmob,
std::vector<double>& omega)
{
int num_cells = cells.size();
int num_phases = props.numPhases();
totmob.resize(num_cells);
omega.resize(num_cells);
assert(int(s.size()) == num_cells*num_phases);
std::vector<double> kr(num_cells*num_phases);
props.relperm(num_cells, &s[0], &cells[0], &kr[0], 0);
const double* visc = props.viscosity();
const double* rho = props.density();
double mob[2]; // here we assume num_phases=2
for (int cell = 0; cell < num_cells; ++cell) {
double* kr_cell = &kr[2*cell];
polyprops.effectiveMobilities(c[cell], cmax[cell], visc, kr_cell,
mob);
totmob[cell] = mob[0] + mob[1];
omega[cell] = rho[0]*mob[0]/totmob[cell] + rho[1]*mob[1]/totmob[cell];
}
}