Started with 3D particle tracing
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13ef17ad35
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@ -16,6 +16,8 @@
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#include "solver.h"
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#include "timing.h"
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#include "vtkWriter.h"
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#include "particletracing.h"
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#define G(v, i, j, k) v[(k) * (imax + 2) * (jmax + 2) + (j) * (imax + 2) + (i)]
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@ -90,6 +92,8 @@ int main(int argc, char** argv)
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}
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printParameter(¶ms);
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initSolver(&s, ¶ms);
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initParticleTracer(&particletracer, ¶ms);
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printParticleTracerParameters(&particletracer);
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#ifndef VERBOSE
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initProgress(s.te);
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#endif
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@ -110,6 +114,9 @@ int main(int argc, char** argv)
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computeRHS(&s);
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solver_generic[variant - 1](&s);
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adaptUV(&s);
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trace(&particletracer, &solver, s.u, s.v, s.w, t);
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t += s.dt;
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#ifdef VERBOSE
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@ -88,6 +88,19 @@ void readParameter(Parameter* param, const char* filename)
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PARSE_REAL(w_init);
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PARSE_REAL(p_init);
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PARSE_REAL(rho);
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/* Added new particle tracing parameters */
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PARSE_INT(numberOfParticles);
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PARSE_REAL(startTime);
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PARSE_REAL(injectTimePeriod);
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PARSE_REAL(writeTimePeriod);
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PARSE_REAL(x1);
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PARSE_REAL(y1);
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PARSE_REAL(z1);
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PARSE_REAL(x2);
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PARSE_REAL(y2);
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PARSE_REAL(z2);
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}
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}
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@ -18,6 +18,11 @@ typedef struct {
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char* name;
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int bcLeft, bcRight, bcBottom, bcTop, bcFront, bcBack;
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double u_init, v_init, w_init, p_init;
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int numberOfParticles;
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double startTime, injectTimePeriod, writeTimePeriod;
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double x1, y1, z1, x2, y2, z2;
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} Parameter;
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void initParameter(Parameter*);
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232
BasicSolver/3D-seq/src/particletracing.c
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232
BasicSolver/3D-seq/src/particletracing.c
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@ -0,0 +1,232 @@
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/*
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* Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
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* All rights reserved. This file is part of nusif-solver.
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* Use of this source code is governed by a MIT style
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* license that can be found in the LICENSE file.
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*/
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#include <float.h>
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "vtkWriter.h"
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#define U(i, j, k) u[(k) * (imax + 2) * (jmax + 2) + (j) * (imax + 2) + (i)]
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#define V(i, j, k) v[(k) * (imax + 2) * (jmax + 2) + (j) * (imax + 2) + (i)]
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#define W(i, j, k) w[(k) * (imax + 2) * (jmax + 2) + (j) * (imax + 2) + (i)]
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static int ts = 0;
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void printParticles(ParticleTracer* particletracer)
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{
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for(int i = 0; i < particletracer->totalParticles; ++i)
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{
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printf("Particle position X : %.2f, Y : %.2f, flag : %d\n", particletracer->particlePool[i].x,
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particletracer->particlePool[i].y,
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particletracer->particlePool[i].flag);
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}
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}
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void injectParticles(ParticleTracer* particletracer)
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{
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for(int i = 0; i < particletracer->numberOfParticles; ++i)
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{
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particletracer->particlePool[particletracer->pointer].x = particletracer->linSpaceLine[i].x;
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particletracer->particlePool[particletracer->pointer].y = particletracer->linSpaceLine[i].y;
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particletracer->particlePool[particletracer->pointer].flag = true;
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++(particletracer->pointer);
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++(particletracer->totalParticles);
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}
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}
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void advanceParticles(ParticleTracer* particletracer, double* restrict u, double* restrict v, double time)
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{
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int imax = particletracer->imax;
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int jmax = particletracer->jmax;
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double dx = particletracer->dx;
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double dy = particletracer->dy;
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double xlength = particletracer->xlength;
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double ylength = particletracer->ylength;
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for(int i = 0; i < particletracer->totalParticles; ++i)
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{
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if(particletracer->particlePool[i].flag == true)
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{
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double x = particletracer->particlePool[i].x;
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double y = particletracer->particlePool[i].y;
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int iCoord = (int)(x / dx) + 1;
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int jCoord = (int)((y + 0.5 * dy) / dy) + 1;
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double x1 = (double)(iCoord - 1) * dx;
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double y1 = ((double)(jCoord - 1) - 0.5) * dy;
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double x2 = (double)iCoord * dx;
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double y2 = ((double)jCoord - 0.5) * dy;
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double u_n = (1.0 / (dx * dy)) *
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((x2 - x) * (y2 - y) * U(iCoord - 1, jCoord - 1) +
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(x - x1) * (y2 - y) * U(iCoord, jCoord - 1) +
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(x2 - x) * (y - y1) * U(iCoord - 1, jCoord) +
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(x - x1) * (y - y1) * U(iCoord, jCoord));
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double new_x = x + particletracer->dt * u_n;
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particletracer->particlePool[i].x = new_x;
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iCoord = (int)((x + 0.5 * dx) / dx) + 1;
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jCoord = (int)(y / dy) + 1;
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x1 = ((double)(iCoord - 1) - 0.5) * dx;
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y1 = (double)(jCoord - 1) * dy;
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x2 = ((double)iCoord - 0.5) * dx;
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y2 = (double)jCoord * dy;
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double v_n = (1.0 / (dx * dy)) *
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((x2 - x) * (y2 - y) * V(iCoord - 1, jCoord - 1) +
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(x - x1) * (y2 - y) * V(iCoord, jCoord - 1) +
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(x2 - x) * (y - y1) * V(iCoord - 1, jCoord) +
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(x - x1) * (y - y1) * V(iCoord, jCoord));
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double new_y = y + particletracer->dt * v_n;
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particletracer->particlePool[i].y = new_y;
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// printf("\tOld X : %.2f, New X : %.2f, iCoord : %d\n\tOld Y : %.2f, New Y : %.2f, jCoord : %d\n\n", x, new_x, iCoord, y, new_y, jCoord);
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// printf("\tU(iCoord - 1, jCoord - 1) : %.2f, U(iCoord, jCoord - 1) : %.2f, U(iCoord - 1, jCoord) : %.2f, U(iCoord, jCoord) : %.2f\n", U(iCoord - 1, jCoord - 1), U(iCoord, jCoord - 1), U(iCoord - 1, jCoord), U(iCoord, jCoord));
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// printf("\tV(iCoord - 1, jCoord - 1) : %.2f, V(iCoord, jCoord - 1) : %.2f, V(iCoord - 1, jCoord) : %.2f, V(iCoord, jCoord) : %.2f\n\n", V(iCoord - 1, jCoord - 1), V(iCoord, jCoord - 1), V(iCoord - 1, jCoord), V(iCoord, jCoord));
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// printf("\t U N : %.2f, V N : %.2f\n\n", u_n, v_n);
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// printf("\t j-1 * (imax + 2) + i-1 = %d with element from U : %.2f", (jCoord - 1) * (200 + 2) + (iCoord - 1), u[(jCoord - 1) * (imax + 2) + (iCoord - 1)]);
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// printf("\nimax : %d, jmax : %d\n", imax, jmax);
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if (((new_x < 0.0) || (new_x > xlength) || (new_y < 0.0) || (new_y > ylength)))
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{
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particletracer->particlePool[i].flag = false;
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}
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}
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}
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}
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void freeParticles(ParticleTracer* particletracer)
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{
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free(particletracer->particlePool);
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free(particletracer->linSpaceLine);
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}
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void writeParticles(ParticleTracer* particletracer, Solver* solver)
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{
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VtkOptions opts = { .solver = solver, .particletracer = particletracer };
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char filename[50];
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snprintf(filename, 50, "vtk_files/particles%d.vtk", ts);
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vtkOpen(&opts, filename, ts);
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vtkParticle(&opts, "particle");
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vtkClose(&opts);
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FILE* fp;
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Particle* particlePool = particletracer->particlePool;
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snprintf(filename, 50, "vis_files/particles_%d.dat", ts);
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fp = fopen(filename, "w");
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if (fp == NULL) {
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printf("Error!\n");
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exit(EXIT_FAILURE);
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}
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for (int i = 0; i < particletracer->totalParticles; ++i)
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{
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if(particlePool[i].flag == true)
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{
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double x = particlePool[i].x;
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double y = particlePool[i].y;
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fprintf(fp, "%f %f\n", x, y);
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}
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}
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fclose(fp);
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++ts;
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}
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void initParticleTracer(ParticleTracer* particletracer, Parameter* params)
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{
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particletracer->numberOfParticles = params->numberOfParticles;
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particletracer->startTime = params->startTime;
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particletracer->injectTimePeriod = params->injectTimePeriod;
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particletracer->writeTimePeriod = params->writeTimePeriod;
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particletracer->dt = params->dt;
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particletracer->dx = params->xlength / params->imax;
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particletracer->dy = params->ylength / params->jmax;
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particletracer->dz = params->zlength / params->kmax;
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particletracer->xlength = params->xlength;
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particletracer->ylength = params->ylength;
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particletracer->zlength = params->zlength;
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particletracer->x1 = params->x1;
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particletracer->y1 = params->y1;
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particletracer->z1 = params->z1;
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particletracer->x2 = params->x2;
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particletracer->y2 = params->y2;
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particletracer->z2 = params->z2;
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particletracer->lastInjectTime = params->startTime;
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particletracer->lastUpdateTime = params->startTime;
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particletracer->lastWriteTime = params->startTime;
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particletracer->pointer = 0;
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particletracer->totalParticles = 0;
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particletracer->imax = params->imax;
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particletracer->jmax = params->jmax;
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particletracer->kmax = params->kmax;
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particletracer->estimatedNumParticles = ((params->te - params->startTime) + 2 ) * params->numberOfParticles;
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particletracer->particlePool = malloc(sizeof(Particle) * particletracer->estimatedNumParticles);
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particletracer->linSpaceLine = malloc(sizeof(Particle) * particletracer->numberOfParticles);
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for (int i = 0; i < particletracer->numberOfParticles; ++i)
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{
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double spacing = (double)i / (double)(particletracer->numberOfParticles - 1);
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particletracer->linSpaceLine[i].x = spacing * particletracer->x1 + (1.0 - spacing) * particletracer->x2;
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particletracer->linSpaceLine[i].y = spacing * particletracer->y1 + (1.0 - spacing) * particletracer->y2;
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particletracer->linSpaceLine[i].z = spacing * particletracer->z1 + (1.0 - spacing) * particletracer->z2;
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particletracer->linSpaceLine[i].flag = true;
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}
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}
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void printParticleTracerParameters(ParticleTracer* particletracer)
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{
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printf("Particle Tracing data:\n");
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printf("\tNumber of particles : %d being injected for every period of %.2f\n", particletracer->numberOfParticles, particletracer->injectTimePeriod);
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printf("\tstartTime : %.2f\n", particletracer->startTime);
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printf("\t(Line along which the particles are to be injected) \n\tx1 : %.2f, y1 : %.2f, z1 : %.2f, x2 : %.2f, y2 : %.2f, z2 : %.2f\n", particletracer->x1, particletracer->y1, particletracer->z1, particletracer->x2, particletracer->y2, particletracer->z2);
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printf("\tPointer : %d, TotalParticles : %d\n", particletracer->pointer, particletracer->totalParticles);
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printf("\tdt : %.2f, dx : %.2f, dy : %.2f, dz : %.2f\n", particletracer->dt, particletracer->dx, particletracer->dy, particletracer->dz);
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}
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void trace(ParticleTracer* particletracer, Solver* solver, double* u, double* v, double* w, double time)
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{
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if (time >= particletracer->startTime)
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{
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//printParticles(particletracer);
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if( (time - particletracer->lastInjectTime) >= particletracer->injectTimePeriod)
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{
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injectParticles(particletracer);
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particletracer->lastInjectTime = time;
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}
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if( (time - particletracer->lastWriteTime) >= particletracer->writeTimePeriod)
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{
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writeParticles(particletracer, solver);
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particletracer->lastWriteTime = time;
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}
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advanceParticles(particletracer, u, v, w, time);
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particletracer->lastUpdateTime = time;
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}
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}
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47
BasicSolver/3D-seq/src/particletracing.h
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47
BasicSolver/3D-seq/src/particletracing.h
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@ -0,0 +1,47 @@
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/*
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* Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
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* All rights reserved. This file is part of nusif-solver.
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* Use of this source code is governed by a MIT style
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* license that can be found in the LICENSE file.
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*/
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#ifndef __PARTICLETRACING_H_
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#define __PARTICLETRACING_H_
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#include "allocate.h"
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#include "parameter.h"
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#include "solver.h"
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#include "particletracing.h"
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#include <stdbool.h>
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typedef enum COORD { X = 0, Y, NCOORD } COORD;
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typedef struct
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{
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double x, y, z;
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bool flag;
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} Particle;
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typedef struct {
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int numberOfParticles, totalParticles;
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double startTime, injectTimePeriod, writeTimePeriod, lastInjectTime, lastUpdateTime, lastWriteTime;
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int estimatedNumParticles;
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double dx, dy, dz, dt;
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Particle* linSpaceLine;
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Particle* particlePool;
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int pointer;
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double imax, jmax, kmax, xlength, ylength, zlength;
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double x1, y1, x2, y2, z1, z2;
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} ParticleTracer;
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void initParticleTracer(ParticleTracer*, Parameter*);
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void injectParticles(ParticleTracer*);
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void advanceParticles(ParticleTracer*, double* , double*, double*, double);
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void freeParticles(ParticleTracer*);
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void writeParticles(ParticleTracer*, Solver*);
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void printParticleTracerParameters(ParticleTracer*);
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void printParticles(ParticleTracer*);
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void trace(ParticleTracer*, Solver*, double* , double* , double* , double);
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#endif
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