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Adding otf ww adjustment using lower bound ratio.

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This commit is contained in:
Patrick Shriwise 2022-01-21 08:47:10 -06:00
commit 9aa6134366
5 changed files with 67 additions and 4 deletions
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7
include/openmc/particle_data.h
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@ -309,7 +309,9 @@ private:
int n_event_ {0}; // number of events executed in this particle's history
// Weight window information
int n_split_ {0}; // Number of splits this particle has undergone
int n_split_ {0}; // Number of times this particle has been split
double ww_factor_ {
0.0}; // Particle-specific factor for on-the-fly weight window adjustment
// DagMC state variables
#ifdef DAGMC
@ -435,6 +437,9 @@ public:
int n_split() const { return n_split_; }
int& n_split() { return n_split_; }
double ww_factor() const { return ww_factor_; }
double& ww_factor() { return ww_factor_; }
#ifdef DAGMC
moab::DagMC::RayHistory& history() { return history_; }
Direction& last_dir() { return last_dir_; }

9
include/openmc/weight_windows.h
View file

@ -52,12 +52,20 @@ extern vector<unique_ptr<WeightWindows>> weight_windows;
struct WeightWindow {
double lower_weight {-1}; // -1 indicates invalid state
double upper_weight {1};
double max_lb_ratio {1};
double survival_weight {0.5};
double weight_cutoff {DEFAULT_WEIGHT_CUTOFF};
int max_split {1};
//! Whether the weight window is in a valid state
bool is_valid() const { return lower_weight >= 0.0; }
//! Adjust the weight window by a constant factor
void scale(double factor)
{
lower_weight *= factor;
upper_weight *= factor;
}
};
//==============================================================================
@ -96,6 +104,7 @@ private:
vector<double> lower_ww_; //!< Lower weight window bounds
vector<double> upper_ww_; //!< Upper weight window bounds
double survival_ratio_ {3.0}; //!< Survival weight ratio
double max_lb_ratio_ {1.0}; //!< Maximum lower bound to particle weight ratio
double weight_cutoff_ {DEFAULT_WEIGHT_CUTOFF}; //!< Weight cutoff
int max_split_ {10}; //!< Maximum value for particle splitting
int32_t mesh_idx_; //!< index in meshes vector