std::set<int>& KrivodonovaDiscontinuityDetector::get_discontinuous_element_ids(double threshold)
{
Element* e;
for_all_active_elements(e, mesh)
{
bool element_inserted = false;
for(int edge_i = 0; edge_i < e->get_num_surf() && !element_inserted; edge_i++)
if(calculate_relative_flow_direction(e, edge_i) < 0 && !e->en[edge_i]->bnd)
{
double jumps[1];
calculate_jumps(e, edge_i, jumps);
double diameter_indicator = calculate_h(e, spaces[0]->get_element_order(e->id));
double edge_length = std::sqrt(std::pow(e->vn[(edge_i + 1) % e->get_num_surf()]->x - e->vn[edge_i]->x, 2) + std::pow(e->vn[(edge_i + 1) % e->get_num_surf()]->y - e->vn[edge_i]->y, 2));
double norms[1];
calculate_norms(e, edge_i, norms);
// Number of component jumps tested.
unsigned int component_checked_number = 1;
for(unsigned int component_i = 0; component_i < component_checked_number; component_i++) {
if(norms[component_i] < 1E-8)
continue;
double discontinuity_detector = jumps[component_i] / (diameter_indicator * edge_length * norms[component_i]);
if(discontinuity_detector > threshold)
{
discontinuous_element_ids.insert(e->id);
element_inserted = true;
break;
}
}
}
}
std::set<int>& DiscontinuityDetector::get_discontinuous_element_ids(double threshold)
{
Element* e;
for_all_active_elements(e, mesh) {
for(int edge_i = 0; edge_i < e->get_num_surf(); edge_i++)
if(calculate_relative_flow_direction(e, edge_i) < -1e-3 && !e->en[edge_i]->bnd) {
double jump = calculate_jumps(e, edge_i);
double diameter_indicator = std::pow(e->get_diameter(), (H2D_GET_H_ORDER(spaces[0]->get_element_order(e->id)) + 1) / 2);
double edge_length = std::sqrt(std::pow(e->vn[(edge_i + 1) % 4]->x - e->vn[edge_i]->x, 2) + std::pow(e->vn[(edge_i + 1) % 4]->y - e->vn[edge_i]->y, 2));
double norm = calculate_norm(e, edge_i);
double discontinuity_detector = jump / (diameter_indicator * edge_length * norm);
if(discontinuity_detector > threshold)
discontinuous_element_ids.insert(e->id);
}
}
return discontinuous_element_ids;
};