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move calculation part of handleAccelerationPressureLoss to MultisegmentwellSegments

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This commit is contained in:
Arne Morten Kvarving
2022-12-19 15:12:43 +01:00
parent 70702738cc
commit 4b3a6f37d5
3 changed files with 48 additions and 32 deletions
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36
opm/simulators/wells/MultisegmentWellEval.cpp
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@@ -185,43 +185,15 @@ MultisegmentWellEval<FluidSystem,Indices,Scalar>::
handleAccelerationPressureLoss(const int seg,
WellState& well_state)
{
const double area = this->segmentSet()[seg].crossArea();
const EvalWell mass_rate = segments_.mass_rates_[seg];
const int seg_upwind = segments_.upwinding_segments_[seg];
EvalWell density = segments_.densities_[seg_upwind];
// WARNING
// We disregard the derivatives from the upwind density to make sure derivatives
// wrt. to different segments dont get mixed.
if (seg != seg_upwind) {
density.clearDerivatives();
}
EvalWell accelerationPressureLoss = mswellhelpers::velocityHead(area, mass_rate, density);
// handling the velocity head of intlet segments
for (const int inlet : this->segments_.inlets_[seg]) {
const int seg_upwind_inlet = segments_.upwinding_segments_[inlet];
const double inlet_area = this->segmentSet()[inlet].crossArea();
EvalWell inlet_density = this->segments_.densities_[seg_upwind_inlet];
// WARNING
// We disregard the derivatives from the upwind density to make sure derivatives
// wrt. to different segments dont get mixed.
if (inlet != seg_upwind_inlet) {
inlet_density.clearDerivatives();
}
const EvalWell inlet_mass_rate = segments_.mass_rates_[inlet];
accelerationPressureLoss -= mswellhelpers::velocityHead(std::max(inlet_area, area), inlet_mass_rate, inlet_density);
}
// We change the sign of the accelerationPressureLoss for injectors.
// Is this correct? Testing indicates that this is what the reference simulator does
const double sign = mass_rate < 0. ? 1.0 : - 1.0;
accelerationPressureLoss *= sign;
const EvalWell accelerationPressureLoss = segments_.accelerationPressureLoss(seg);
auto& segments = well_state.well(baseif_.indexOfWell()).segments;
segments.pressure_drop_accel[seg] = accelerationPressureLoss.value();
MultisegmentWellAssemble<FluidSystem,Indices,Scalar>(baseif_).
assemblePressureLoss(seg, seg_upwind, accelerationPressureLoss, linSys_);
assemblePressureLoss(seg,
segments_.upwinding_segments_[seg],
accelerationPressureLoss, linSys_);
}
template<typename FluidSystem, typename Indices, typename Scalar>

41
opm/simulators/wells/MultisegmentWellSegments.cpp
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@@ -673,6 +673,47 @@ pressureDropValve(const int seg) const
return sign * (friction_pressure_loss + constriction_pressure_loss);
}
template<class FluidSystem, class Indices, class Scalar>
typename MultisegmentWellSegments<FluidSystem,Indices,Scalar>::EvalWell
MultisegmentWellSegments<FluidSystem,Indices,Scalar>::
accelerationPressureLoss(const int seg) const
{
const auto& segment_set = well_.wellEcl().getSegments();
const double area = segment_set[seg].crossArea();
const EvalWell mass_rate = mass_rates_[seg];
const int seg_upwind = upwinding_segments_[seg];
EvalWell density = densities_[seg_upwind];
// WARNING
// We disregard the derivatives from the upwind density to make sure derivatives
// wrt. to different segments dont get mixed.
if (seg != seg_upwind) {
density.clearDerivatives();
}
EvalWell accelerationPressureLoss = mswellhelpers::velocityHead(area, mass_rate, density);
// handling the velocity head of intlet segments
for (const int inlet : inlets_[seg]) {
const int seg_upwind_inlet = upwinding_segments_[inlet];
const double inlet_area = segment_set[inlet].crossArea();
EvalWell inlet_density = densities_[seg_upwind_inlet];
// WARNING
// We disregard the derivatives from the upwind density to make sure derivatives
// wrt. to different segments dont get mixed.
if (inlet != seg_upwind_inlet) {
inlet_density.clearDerivatives();
}
const EvalWell inlet_mass_rate = mass_rates_[inlet];
accelerationPressureLoss -= mswellhelpers::velocityHead(std::max(inlet_area, area), inlet_mass_rate, inlet_density);
}
// We change the sign of the accelerationPressureLoss for injectors.
// Is this correct? Testing indicates that this is what the reference simulator does
const double sign = mass_rate < 0. ? 1.0 : - 1.0;
accelerationPressureLoss *= sign;
return accelerationPressureLoss;
}
#define INSTANCE(...) \
template class MultisegmentWellSegments<BlackOilFluidSystem<double,BlackOilDefaultIndexTraits>,__VA_ARGS__,double>;

3
opm/simulators/wells/MultisegmentWellSegments.hpp
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@@ -68,6 +68,9 @@ public:
// pressure drop for sub-critical valve (WSEGVALV)
EvalWell pressureDropValve(const int seg) const;
// pressure loss due to acceleration
EvalWell accelerationPressureLoss(const int seg) const;
// TODO: trying to use the information from the Well opm-parser as much
// as possible, it will possibly be re-implemented later for efficiency reason.