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-rw-r--r--src/get_conductivity.c37
1 files changed, 24 insertions, 13 deletions
diff --git a/src/get_conductivity.c b/src/get_conductivity.c
index 8c4d228..23b7056 100644
--- a/src/get_conductivity.c
+++ b/src/get_conductivity.c
@@ -1,24 +1,35 @@
#include "fracture.h"
-double get_conductivity(net_t *inst, double *voltage, cholmod_common *c) {
- if (inst->voltage_bound) {
+double get_conductivity(net_t *net, double *voltages, cholmod_common *c) {
+ if (net->voltage_bound) {
+ // the voltage drop across the network is fixed to one with voltage
+ // boundary conditions, so the conductivity is the total current flowing
double tot_cur = 0;
- for (unsigned int i = 0; i < inst->graph->num_spanning_edges; i++) {
- unsigned int e = inst->graph->spanning_edges[i];
- if (!inst->fuses[e]) {
- unsigned int v1 = inst->graph->ev[2*e];
- unsigned int v2 = inst->graph->ev[2*e+1];
- double v1y = inst->graph->vx[2 * v1 + 1];
- double v2y = inst->graph->vx[2 * v2 + 1];
- unsigned int s1 = v1y < v2y ? v1 : v2;
- unsigned int s2 = v1y < v2y ? v2 : v1;
- tot_cur += voltage[s1] - voltage[s2];
+ for (uint_t i = 0; i < net->graph->num_spanning_edges; i++) {
+ uint_t e = net->graph->spanning_edges[i];
+
+ if (!net->fuses[e]) {
+ uint_t v1, v2, s1, s2;
+ double v1y, v2y;
+
+ v1 = net->graph->ev[2 * e];
+ v2 = net->graph->ev[2 * e + 1];
+
+ v1y = net->graph->vx[2 * v1 + 1];
+ v2y = net->graph->vx[2 * v2 + 1];
+
+ s1 = v1y < v2y ? v1 : v2;
+ s2 = v1y < v2y ? v2 : v1;
+
+ tot_cur += voltages[s1] - voltages[s2];
}
}
return fabs(tot_cur);
} else {
- return 1 / fabs(voltage[inst->graph->nv] - voltage[inst->graph->nv + 1]);
+ // the current across the network is fixed to one with current boundary
+ // conditions, so the conductivity is the inverse of the total voltage drop
+ return 1 / fabs(voltages[net->graph->nv] - voltages[net->graph->nv + 1]);
}
}