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optimizing the function computeSegmentPressuresDelta()

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Further optimization is possible by introducing new variable for the
model to avoid recomputation.
This commit is contained in:
Kai Bao 2015-11-18 17:07:57 +01:00
parent 79b9039ba1
commit 4b9064a0f8
1 changed files with 2 additions and 18 deletions
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20
opm/autodiff/BlackoilMultiSegmentModel_impl.hpp
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@ -1990,14 +1990,12 @@ namespace Opm {
// calculate the depth difference of the segments
// TODO: make it a member fo the new Wells class or WellState or the Model.
// so that only do this once for each timestep.
// TODO: we need to store the following values some well to avoid recomputation.
V segment_depth_delta = V::Zero(nseg_total);
int nperf_total = 0;
int start_segment = 0;
for (int w = 0; w < nw; ++w) {
WellMultiSegmentConstPtr well = wellsMultiSegment()[w];
const int nseg = well->numberOfSegments();
const int nperf = well->numberOfPerforations();
nperf_total += nperf;
for (int s = 1; s < nseg; ++s) {
const int s_outlet = well->outletSegment()[s];
assert(s_outlet >= 0 && s_outlet < nseg);
@ -2011,21 +2009,7 @@ namespace Opm {
const ADB grav_adb = ADB::constant(V::Constant(nseg_total, grav));
well_segment_pressures_delta_ = segment_depth_delta * grav_adb * well_segment_densities_;
// again we need a global mapping
ADB well_segment_perforation_densities = ADB::constant(V::Zero(nperf_total));
int start_perforation = 0;
start_segment = 0;
for (int w = 0; w < nw; ++w) {
WellMultiSegmentConstPtr well = wellsMultiSegment()[w];
const int nseg = well->numberOfSegments();
const int nperf = well->numberOfPerforations();
ADB segment_densities_well = subset(well_segment_densities_, Span(nseg, 1 , start_segment));
ADB segment_densities_perforation_densities_well = well->wellOps().s2p * segment_densities_well;
well_segment_perforation_densities += superset(segment_densities_perforation_densities_well,
Span(nperf, 1, start_perforation), nperf_total);
start_segment += nseg;
start_perforation += nperf;
}
ADB well_segment_perforation_densities = wops_ms_.s2p * well_segment_densities_;
well_segment_perforation_pressure_diffs_ = grav * well_segment_perforation_depth_diffs_ * well_segment_perforation_densities;
#if 0