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feat(neutrino): Started framework for neutrino loss

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Neutrino loss is essential for neutrino cooling. Started adding
framework to track this. Reaclib reactions use a simple heuristic where
electron capture reactions loss 100% of their energy to neutrinos
whereas beta decay reactions loose 50% of their energy to neutrinos
This commit is contained in:
Emily Boudreaux
2025-11-27 14:34:20 -05:00
parent 7b67f3064a
commit 05175ae87c
13 changed files with 259 additions and 119 deletions
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25
src/lib/solver/strategies/CVODE_solver_strategy.cpp
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@@ -147,6 +147,9 @@ namespace gridfire::solver {
m_num_steps = 0;
double accumulated_energy = 0.0;
double accumulated_neutrino_energy_loss = 0.0;
double accumulated_total_neutrino_flux = 0.0;
size_t total_convergence_failures = 0;
size_t total_nonlinear_iterations = 0;
size_t total_update_stages_triggered = 0;
@@ -187,6 +190,8 @@ namespace gridfire::solver {
sunrealtype* y_data = N_VGetArrayPointer(m_Y);
const double current_energy = y_data[numSpecies]; // Specific energy rate
accumulated_neutrino_energy_loss += user_data.neutrino_energy_loss_rate;
accumulated_total_neutrino_flux += user_data.total_neutrino_flux;
size_t iter_diff = (total_nonlinear_iterations + nliters) - prev_nonlinear_iterations;
size_t convFail_diff = (total_convergence_failures + nlcfails) - prev_convergence_failures;
if (m_stdout_logging_enabled) {
@@ -503,6 +508,8 @@ namespace gridfire::solver {
netOut.dEps_dT = dEps_dT;
netOut.dEps_dRho = dEps_dRho;
netOut.neutrino_energy_loss_rate = accumulated_neutrino_energy_loss;
netOut.total_neutrino_flux = accumulated_total_neutrino_flux;
LOG_TRACE_L2(m_logger, "Output data built!");
LOG_TRACE_L2(m_logger, "Solver evaluation complete!.");
@@ -561,8 +568,11 @@ namespace gridfire::solver {
try {
LOG_TRACE_L2(instance->m_logger, "CVODE RHS wrapper called at time {}", t);
const auto [reaction_contribution_map] = instance->calculate_rhs(t, y, ydot, data);
data->reaction_contribution_map = reaction_contribution_map;
// ReSharper disable once CppUseStructuredBinding
const auto result = instance->calculate_rhs(t, y, ydot, data);
data->reaction_contribution_map = result.reaction_contribution_map;
data->neutrino_energy_loss_rate = result.neutrino_energy_loss_rate;
data->total_neutrino_flux = result.total_neutrino_flux;
LOG_TRACE_L2(instance->m_logger, "CVODE RHS wrapper completed successfully at time {}", t);
return 0;
} catch (const exceptions::EngineError& e) {
@@ -724,7 +734,14 @@ namespace gridfire::solver {
}
sunrealtype* ydot_data = N_VGetArrayPointer(ydot);
const auto& [dydt, nuclearEnergyGenerationRate, reactionContributions] = result.value();
const auto& [
dydt,
nuclearEnergyGenerationRate,
reactionContributions,
neutrinoEnergyLossRate,
totalNeutrinoFlux
] = result.value();
LOG_TRACE_L2(m_logger, "Done calculating RHS at time {}, specific nuclear energy generation rate: {}", t, nuclearEnergyGenerationRate);
LOG_TRACE_L2(m_logger, "RHS at time {} is {}", t, [&dydt]() -> std::string {
std::stringstream ss;
@@ -745,7 +762,7 @@ namespace gridfire::solver {
}
ydot_data[numSpecies] = nuclearEnergyGenerationRate; // Set the last element to the specific energy rate
return {reactionContributions};
return {reactionContributions, result.value().neutrinoEnergyLossRate, result.value().totalNeutrinoFlux};
}
void CVODESolverStrategy::initialize_cvode_integration_resources(