OilfieldToolsNet/opm-simulators
4
0
Fork 0
mirror of https://github.com/OPM/opm-simulators.git synced 2025-02-25 18:55:30 -06:00
Code Issues Packages Projects Releases Wiki Activity

Use free function for multi-phase upwinding.

Browse Source
This commit is contained in:
Atgeirr Flø Rasmussen
2017-06-01 14:15:31 +02:00
parent 33025d752e
commit 7e8ed40714
1 changed files with 10 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
opm/autodiff/BlackoilTransportModel.hpp
View File

@@ -26,6 +26,7 @@
#include <opm/autodiff/WellStateFullyImplicitBlackoil.hpp> #include <opm/autodiff/WellStateFullyImplicitBlackoil.hpp>
#include <opm/autodiff/BlackoilModelParameters.hpp> #include <opm/autodiff/BlackoilModelParameters.hpp>
#include <opm/simulators/timestepping/SimulatorTimerInterface.hpp> #include <opm/simulators/timestepping/SimulatorTimerInterface.hpp>
#include <opm/autodiff/multiPhaseUpwind.hpp>
namespace Opm { namespace Opm {
@@ -401,58 +402,22 @@ namespace Opm {
Eigen::Array<double, Eigen::Dynamic, Eigen::Dynamic> multiPhaseUpwind(const std::vector<ADB>& head_diff, Eigen::Array<double, Eigen::Dynamic, Eigen::Dynamic> multiPhaseUpwind(const std::vector<ADB>& head_diff,
const V& transmissibility) const V& transmissibility)
{ {
// Based on the paper "Upstream Differencing for Multiphase Flow in Reservoir Simulation", assert(numPhases() == 3);
// by Yann Brenier and Jérôme Jaffré,
// SIAM J. Numer. Anal., 28(3), 685–696.
// DOI:10.1137/0728036
// Using the data members:
// total_flux_
// sd_.rq[].mob
// Notation based on paper cited above.
const int num_connections = head_diff[0].size(); const int num_connections = head_diff[0].size();
Eigen::Array<double, Eigen::Dynamic, Eigen::Dynamic> upwind(num_connections, numPhases()); Eigen::Array<double, Eigen::Dynamic, Eigen::Dynamic> upwind(num_connections, numPhases());
using ValueAndIndex = std::pair<double, int>;
const int num_phases = numPhases();
std::vector<ValueAndIndex> g(num_phases);
std::vector<double> theta(num_phases);
for (int conn = 0; conn < num_connections; ++conn) { for (int conn = 0; conn < num_connections; ++conn) {
const double q = total_flux_[conn]; const double q = total_flux_[conn];
const double t = transmissibility[conn]; const double t = transmissibility[conn];
const int a = ops_.connection_cells(conn, 0); // first cell of connection const int a = ops_.connection_cells(conn, 0); // first cell of connection
const int b = ops_.connection_cells(conn, 1); // second cell of connection const int b = ops_.connection_cells(conn, 1); // second cell of connection
auto up = connectionMultiPhaseUpwind(
// Get and sort the g values (also called "weights" in the paper) for this connection. {{ head_diff[0].value()[conn], head_diff[1].value()[conn], head_diff[2].value()[conn] }},
for (int phase_idx = 0; phase_idx < num_phases; ++phase_idx) { {{ sd_.rq[0].mob.value()[a], sd_.rq[1].mob.value()[a], sd_.rq[2].mob.value()[a]}},
g[phase_idx] = ValueAndIndex(head_diff[phase_idx].value()[conn], phase_idx); {{ sd_.rq[0].mob.value()[b], sd_.rq[1].mob.value()[b], sd_.rq[2].mob.value()[b]}},
} t,
std::sort(g.begin(), g.end()); q);
for (int ii = 0; ii < numPhases(); ++ii) {
// Compute theta and r. upwind(conn, ii) = up[ii];
// Paper notation: subscript l -> ell (for read/searchability)
// Note that since we index phases from 0, r is one less than in the paper.
int r = -1;
for (int ell = 0; ell < num_phases; ++ell) {
theta[ell] = q;
for (int j = 0; j < num_phases; ++j) {
if (j < ell) {
theta[ell] += t * (g[ell].first - g[j].first) * sd_.rq[g[j].second].mob.value()[b];
}
if (j > ell) {
theta[ell] += t * (g[ell].first - g[j].first) * sd_.rq[g[j].second].mob.value()[a];
}
}
if (theta[ell] <= 0.0) {
r = ell;
} else {
break; // r is correct, no need to continue
}
}
for (int ell = 0; ell < num_phases; ++ell) {
const int phase_idx = g[ell].second;
upwind(conn, phase_idx) = ell > r ? 1.0 : -1.0;
} }
} }
return upwind; return upwind;