opm-simulators/opm/core/utility/miscUtilitiesBlackoil.cpp
Bård Skaflestad cc054d474d computeFractionalFlow(): Reuse the output array in all intermediate calculations.
This eliminates a number of free-store operations and data movements.
2012-06-13 17:07:56 +02:00

225 lines
8.8 KiB
C++

/*
Copyright 2012 SINTEF ICT, Applied Mathematics.
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OPM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
*/
#include <opm/core/utility/miscUtilitiesBlackoil.hpp>
#include <opm/core/utility/Units.hpp>
#include <opm/core/grid.h>
#include <opm/core/fluid/BlackoilPropertiesInterface.hpp>
#include <opm/core/utility/ErrorMacros.hpp>
#include <algorithm>
#include <functional>
#include <cmath>
#include <iterator>
namespace Opm
{
/// @brief Computes injected and produced volumes of all phases.
/// Note 1: assumes that only the first phase is injected.
/// Note 2: assumes that transport has been done with an
/// implicit method, i.e. that the current state
/// gives the mobilities used for the preceding timestep.
/// @param[in] props fluid and rock properties.
/// @param[in] p pressure (one value per cell)
/// @param[in] z surface-volume values (for all P phases)
/// @param[in] s saturation values (for all P phases)
/// @param[in] src if < 0: total outflow, if > 0: first phase inflow.
/// @param[in] dt timestep used
/// @param[out] injected must point to a valid array with P elements,
/// where P = s.size()/src.size().
/// @param[out] produced must also point to a valid array with P elements.
void computeInjectedProduced(const BlackoilPropertiesInterface& props,
const std::vector<double>& press,
const std::vector<double>& z,
const std::vector<double>& s,
const std::vector<double>& src,
const double dt,
double* injected,
double* produced)
{
const int num_cells = src.size();
const int np = s.size()/src.size();
if (int(s.size()) != num_cells*np) {
THROW("Sizes of s and src vectors do not match.");
}
std::fill(injected, injected + np, 0.0);
std::fill(produced, produced + np, 0.0);
std::vector<double> visc(np);
std::vector<double> mob(np);
for (int c = 0; c < num_cells; ++c) {
if (src[c] > 0.0) {
injected[0] += src[c]*dt;
} else if (src[c] < 0.0) {
const double flux = -src[c]*dt;
const double* sat = &s[np*c];
props.relperm(1, sat, &c, &mob[0], 0);
props.viscosity(1, &press[c], &z[np*c], &c, &visc[0], 0);
double totmob = 0.0;
for (int p = 0; p < np; ++p) {
mob[p] /= visc[p];
totmob += mob[p];
}
for (int p = 0; p < np; ++p) {
produced[p] += (mob[p]/totmob)*flux;
}
}
}
}
/// @brief Computes total mobility 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] p pressure (one value per cell)
/// @param[in] z surface-volume values (for all P phases)
/// @param[in] s saturation values (for all phases)
/// @param[out] totmob total mobilities.
void computeTotalMobility(const Opm::BlackoilPropertiesInterface& props,
const std::vector<int>& cells,
const std::vector<double>& press,
const std::vector<double>& z,
const std::vector<double>& s,
std::vector<double>& totmob)
{
std::vector<double> pmobc;
computePhaseMobilities(props, cells, press, z, s, pmobc);
const std::size_t np = props.numPhases();
const std::vector<int>::size_type nc = cells.size();
totmob.clear();
totmob.resize(nc, 0.0);
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];
}
}
}
/*
/// @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] p pressure (one value per cell)
/// @param[in] z surface-volume values (for all P phases)
/// @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::BlackoilPropertiesInterface& props,
const std::vector<int>& cells,
const std::vector<double>& p,
const std::vector<double>& z,
const std::vector<double>& s,
std::vector<double>& totmob,
std::vector<double>& omega)
{
std::vector<double> pmobc;
computePhaseMobilities(props, cells, p, z, s, pmobc);
const std::size_t np = props.numPhases();
const std::vector<int>::size_type nc = cells.size();
totmob.clear();
totmob.resize(nc, 0.0);
omega.clear();
omega.resize(nc, 0.0);
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 phase mobilities 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] p pressure (one value per cell)
/// @param[in] z surface-volume values (for all P phases)
/// @param[in] s saturation values (for all phases)
/// @param[out] pmobc phase mobilities (for all phases).
void computePhaseMobilities(const Opm::BlackoilPropertiesInterface& props,
const std::vector<int>& cells,
const std::vector<double>& p,
const std::vector<double>& z,
const std::vector<double>& s,
std::vector<double>& pmobc)
{
const int nc = props.numCells();
const int np = props.numPhases();
ASSERT (int(s.size()) == nc * np);
std::vector<double> mu(nc*np);
props.viscosity(nc, &p[0], &z[0], &cells[0], &mu[0], 0);
pmobc.clear();
pmobc.resize(nc*np, 0.0);
double* dpmobc = 0;
props.relperm(nc, &s[0], &cells[0],
&pmobc[0], dpmobc);
std::transform(pmobc.begin(), pmobc.end(),
mu.begin(),
pmobc.begin(),
std::divides<double>());
}
/// Computes the fractional flow for each cell in the cells argument
/// @param[in] props rock and fluid properties
/// @param[in] cells cells with which the saturation values are associated
/// @param[in] p pressure (one value per cell)
/// @param[in] z surface-volume values (for all P phases)
/// @param[in] s saturation values (for all phases)
/// @param[out] fractional_flow the fractional flow for each phase for each cell.
void computeFractionalFlow(const Opm::BlackoilPropertiesInterface& props,
const std::vector<int>& cells,
const std::vector<double>& p,
const std::vector<double>& z,
const std::vector<double>& s,
std::vector<double>& fractional_flows)
{
const int num_phases = props.numPhases();
computePhaseMobilities(props, cells, p, z, s, fractional_flows);
for (std::vector<int>::size_type i = 0; i < cells.size(); ++i) {
double phase_sum = 0.0;
for (int phase = 0; phase < num_phases; ++phase) {
phase_sum += fractional_flows[i * num_phases + phase];
}
for (int phase = 0; phase < num_phases; ++phase) {
fractional_flows[i * num_phases + phase] /= phase_sum;
}
}
}
} // namespace Opm