BasicSolver/2D-seq/canal.par

@@ -32,7 +32,7 @@ jmax       50	   # number of interior cells in y-direction
 # Time Data:
 # ---------
 
-te      60.0   # final time
+te      100.0   # final time
 dt      0.02    # time stepsize
 tau     0.5     # safety factor for time stepsize control (<0 constant delt)
 
@@ -48,14 +48,25 @@ gamma    0.9       # upwind differencing factor gamma
 # Particle Tracing Data:
 # -----------------------
 
-numberOfParticles   30
+numberOfParticles   60
 startTime           10
 injectTimePeriod    2.0
-writeTimePeriod     2.0
+writeTimePeriod     1.0
 
 x1                  1.0
 y1                  0.0
 x2                  1.0
 y2                  4.0
 
+# Obstacle Geometry Data:
+# -----------------------
+# Shape 0 disable, 1 Rectangle/Square, 2 Circle
+
+shape               1 
+xCenter             7.0
+yCenter             2.0
+xRectLength         3.0
+yRectLength         1.0
+circleRadius        1.0
+
 #===============================================================================

BasicSolver/2D-seq/dcavity.par

@@ -32,7 +32,7 @@ jmax       40		# number of interior cells in y-direction
 # Time Data:
 # ---------
 
-te      100.0		# final time
+te      60.0		# final time
 dt      0.02	    # time stepsize
 tau     0.5	    	# safety factor for time stepsize control (<0 constant delt)
 
@@ -51,10 +51,22 @@ gamma    0.9		# upwind differencing factor gamma
 numberOfParticles   30
 startTime           0
 injectTimePeriod    2.0
-writeTimePeriod     0.5
+writeTimePeriod     0.2
 
 x1                  0.1
 y1                  0.9
 x2                  0.9
 y2                  0.9
+
+
+# Obstacle Geometry Data:
+# -----------------------
+# Shape 0 disable, 1 Rectangle/Square, 2 Circle
+
+shape               1 
+xCenter             0.5
+yCenter             0.5
+xRectLength         0.5
+yRectLength         0.5
+circleRadius        0.5
 #===============================================================================

BasicSolver/2D-seq/src/main.c

@@ -57,6 +57,10 @@ int main (int argc, char** argv)
 
     void (*solver_generic[])() = {solve, solveRB, solveRBA};
 
+    //print(&solver, solver.s);
+
+    //exit(0);
+
     S = getTimeStamp();
 
     while (t <= te) 
@@ -71,7 +75,7 @@ int main (int argc, char** argv)
         adaptUV(&solver);
 
         /* Added function for particle tracing. Will inject and advance particles as per timePeriod */
-        trace(&particletracer, solver.u, solver.v, t);
+        //trace(&particletracer, solver.u, solver.v, t);
 
         t += solver.dt;
         nt++;
@@ -84,6 +88,9 @@ int main (int argc, char** argv)
 #endif
     }
     printf("Total particles : %d\n", particletracer.totalParticles);
+
+    //print(&solver, solver.p);
+
     E = getTimeStamp();
     stopProgress();
 

BasicSolver/2D-seq/src/parameter.c

@@ -90,6 +90,15 @@ void readParameter(Parameter* param, const char* filename)
             PARSE_REAL(y1);
             PARSE_REAL(x2);
             PARSE_REAL(y2);
+
+            /* Added obstacle geometry parameters */
+            PARSE_INT(shape);
+            PARSE_REAL(xCenter);
+            PARSE_REAL(yCenter);
+            PARSE_REAL(xRectLength);
+            PARSE_REAL(yRectLength);
+            PARSE_REAL(circleRadius);
+
         }
     }
 

BasicSolver/2D-seq/src/parameter.h

@@ -23,6 +23,10 @@ typedef struct {
     double startTime, injectTimePeriod, writeTimePeriod;
 
     double x1, y1, x2, y2;
+
+    int shape;
+    double xCenter, yCenter, xRectLength, yRectLength, circleRadius;
+
 } Parameter;
 
 void initParameter(Parameter*);

BasicSolver/2D-seq/src/particletracing.c

@@ -205,7 +205,6 @@ void trace(ParticleTracer* particletracer, double* u, double* v, double time)
         if( (time - particletracer->lastInjectTime) >= particletracer->injectTimePeriod)
         {
             injectParticles(particletracer);
-            printf("Rank : %d particles after particles injected !", particletracer->rank);
             particletracer->lastInjectTime = time;
         }
         if( (time - particletracer->lastWriteTime) >= particletracer->writeTimePeriod)

BasicSolver/2D-seq/src/particletracing.h

@@ -43,6 +43,6 @@ void freeParticles(ParticleTracer*);
 void writeParticles(ParticleTracer*);
 void printParticleTracerParameters(ParticleTracer*);
 void printParticles(ParticleTracer*);
-void trace(ParticleTracer*, Solver*, double* , double* , double );
+void trace(ParticleTracer*, double* , double* , double );
 void compress(ParticleTracer* );
 #endif

BasicSolver/2D-seq/src/solver.c

@@ -20,9 +20,16 @@
 #define G(i, j)   g[(j) * (imax + 2) + (i)]
 #define U(i, j)   u[(j) * (imax + 2) + (i)]
 #define V(i, j)   v[(j) * (imax + 2) + (i)]
+#define S(i, j)   s[(j) * (imax + 2) + (i)]
 #define RHS(i, j) rhs[(j) * (imax + 2) + (i)]
 
-static void print(Solver* solver, double* grid)
+static double distance(i, j, iCenter, jCenter)
+{
+    return sqrt(pow(iCenter - i, 2)
+                + pow(jCenter - j, 2) * 1.0);
+}
+
+void print(Solver* solver, double* grid)
 {
     int imax = solver->imax;
 
@@ -91,6 +98,7 @@ void initSolver(Solver* solver, Parameter* params)
     size_t size = (imax + 2) * (jmax + 2) * sizeof(double);
     solver->u   = allocate(64, size);
     solver->v   = allocate(64, size);
+    solver->s   = allocate(64, size);
     solver->p   = allocate(64, size);
     solver->rhs = allocate(64, size);
     solver->f   = allocate(64, size);
@@ -103,12 +111,71 @@ void initSolver(Solver* solver, Parameter* params)
         solver->rhs[i] = 0.0;
         solver->f[i]   = 0.0;
         solver->g[i]   = 0.0;
+        solver->s[i]   = 1.0;
     }
 
     double dx        = solver->dx;
     double dy        = solver->dy;
     double invSqrSum = 1.0 / (dx * dx) + 1.0 / (dy * dy);
     solver->dtBound  = 0.5 * solver->re * 1.0 / invSqrSum;
+
+    int iCenter = 0, jCenter = 0, iRectLength = 0, jRectLength = 0, radius = 0;
+
+    double* s = solver->s;
+
+    switch(params->shape)
+    {
+        case NOSHAPE:
+            break;
+        case RECT:
+            iCenter = params->xCenter/dx;
+            jCenter = params->yCenter/dy;
+            iRectLength = params->xRectLength/dx;
+            jRectLength = params->yRectLength/dy;
+
+            int i1 = iCenter - iRectLength/2;
+            int i2 = iCenter + iRectLength/2;
+            int j1 = jCenter - jRectLength/2;
+            int j2 = jCenter + jRectLength/2;
+
+            printf("xCenter : %f, yCenter : %f, iCenter : %d, jCenter : %d\n", params->xCenter, params->yCenter, iCenter, jCenter);
+            printf("xRectLength : %f, yRectLength : %f, dx : %f, dy : %f\n", params->xRectLength, params->yRectLength, dx, dy);
+            printf("iRectLength : %d, jRectLength : %d, i1 : %d, i2 : %d, j1 : %d, j2 : %d\n", iRectLength, jRectLength, i1, i2, j1, j2);
+
+            for (int j = 1; j < jmax + 1; j++) 
+            {
+                for (int i = 1; i < imax + 1; i++) 
+                {
+                    if(i1 <= i && i <= i2 && j1 <= j && j <= j2)
+                    {
+                        // if(i == i1 || i == i2 || j == j1 || j == j2) S(i, j) = 2.0;
+                        S(i, j) = 0.0;
+                    }
+                }
+            }
+
+            break;
+        case CIRCLE:
+            iCenter = params->xCenter/dx;
+            jCenter = params->yCenter/dy;
+            radius  = params->circleRadius/dx; // have to change the logic to get max out of both the dx and dy
+
+            for (int j = 1; j < jmax + 1; j++) 
+            {
+                for (int i = 1; i < imax + 1; i++) 
+                {
+                    if(distance(i, j, iCenter, jCenter) <= radius)
+                    {
+                        S(i, j) = 0.0;
+                    }
+                }
+            }
+
+            break;
+        default:
+            break;
+    }
+
 #ifdef VERBOSE
     printConfig(solver);
 #endif
@@ -199,10 +266,12 @@ void solveRB(Solver* solver)
     double idy2   = 1.0 / dy2;
     double factor = solver->omega * 0.5 * (dx2 * dy2) / (dx2 + dy2);
     double* p     = solver->p;
+    double* s     = solver->s;
     double* rhs   = solver->rhs;
     double epssq  = eps * eps;
     int it        = 0;
     double res    = 1.0;
+    double val    = 1.0;
     int pass, jsw, isw;
 
     while ((res >= epssq) && (it < itermax)) {
@@ -214,12 +283,16 @@ void solveRB(Solver* solver)
 
             for (int j = 1; j < jmax + 1; j++) {
                 for (int i = isw; i < imax + 1; i += 2) {
-
+                    // val = S(i+1, j) + S(i-1, j) + S(i, j+1) + S(i, j-1);
+                    // if(val == 0 || S(i,j) == 0) 
+                    // {
+                    //     continue;
+                    // }
                     double r = RHS(i, j) -
                                ((P(i + 1, j) - 2.0 * P(i, j) + P(i - 1, j)) * idx2 +
                                    (P(i, j + 1) - 2.0 * P(i, j) + P(i, j - 1)) * idy2);
 
-                    P(i, j) -= (factor * r);
+                    P(i, j) -= (factor  * r );
                     res += (r * r);
                 }
                 isw = 3 - isw;
@@ -568,13 +641,31 @@ void adaptUV(Solver* solver)
     double* p      = solver->p;
     double* u      = solver->u;
     double* v      = solver->v;
+    double* s      = solver->s;
     double* f      = solver->f;
     double* g      = solver->g;
     double factorX = solver->dt / solver->dx;
     double factorY = solver->dt / solver->dy;
 
-    for (int j = 1; j < jmax + 1; j++) {
-        for (int i = 1; i < imax + 1; i++) {
+    double val = 0;
+
+    for (int j = 1; j < jmax + 1; j++) 
+    {
+        for (int i = 1; i < imax + 1; i++) 
+        {
+            val = S(i+1, j) + S(i-1, j) + S(i, j+1) + S(i, j-1);
+            if(S(i,j) == 0 && val == 0) 
+            {
+                U(i, j) = 0;
+                V(i, j) = 0;
+                continue;
+            }
+            // else if(S(i,j) == 2.0) 
+            // {
+            //     U(i, j) = -U(i, j);
+            //     V(i, j) = -V(i, j);
+            //     continue;
+            // }
             U(i, j) = F(i, j) - (P(i + 1, j) - P(i, j)) * factorX;
             V(i, j) = G(i, j) - (P(i, j + 1) - P(i, j)) * factorY;
         }

BasicSolver/2D-seq/src/solver.h

@@ -9,6 +9,8 @@
 #include "parameter.h"
 
 enum BC { NOSLIP = 1, SLIP, OUTFLOW, PERIODIC };
+/// @brief 
+enum SHAPE { NOSHAPE = 0, RECT, CIRCLE };
 
 typedef struct {
     /* geometry and grid information */
@@ -18,7 +20,7 @@ typedef struct {
     /* arrays */
     double *p, *rhs;
     double *f, *g;
-    double *u, *v;
+    double *u, *v, *s;
     /* parameters */
     double eps, omega, rho;
     double re, tau, gamma;
@@ -43,4 +45,5 @@ extern void setSpecialBoundaryCondition(Solver*);
 extern void computeFG(Solver*);
 extern void adaptUV(Solver*);
 extern void writeResult(Solver*);
+extern void print(Solver*, double*);
 #endif

BasicSolver/2D-seq/src/util.h

@@ -4,6 +4,8 @@
  * Use of this source code is governed by a MIT-style
  * license that can be found in the LICENSE file.
  */
+#include <math.h>
+
 #ifndef __UTIL_H_
 #define __UTIL_H_
 #define HLINE                                                                            \

BasicSolver/2D-seq/vis_files/animate.plot

@@ -3,7 +3,7 @@ set term gif animate delay 50
 set output "trace.gif"
 set xrange [0:30]
 set yrange [0:4]
-do for [ts=0:198] {
+do for [ts=0:200] {
     plot "particles_".ts.".dat" with points pointtype 7
 }
 unset output

BasicSolver/2D-seq/vtk_files/particles0.vtk

@@ -0,0 +1,12 @@
+# vtk DataFile Version 3.0
+PAMPI cfd solver particle tracing file
+ASCII
+DATASET UNSTRUCTURED_GRID
+FIELD FieldData 2
+TIME 1 1 double
+0
+CYCLE 1 1 int
+1
+POINTS 0 float
+CELLS 0 0
+CELL_TYPES 0

BasicSolver/2D-seq/vtk_files/particles1.vtk

@@ -0,0 +1,189 @@
+# vtk DataFile Version 3.0
+PAMPI cfd solver particle tracing file
+ASCII
+DATASET UNSTRUCTURED_GRID
+FIELD FieldData 2
+TIME 1 1 double
+1
+CYCLE 1 1 int
+1
+POINTS 59 float
+1.00 4.00 0.0
+1.00 3.93 0.0
+1.00 3.86 0.0
+1.00 3.80 0.0
+1.01 3.73 0.0
+1.01 3.66 0.0
+1.01 3.59 0.0
+1.01 3.53 0.0
+1.01 3.46 0.0
+1.01 3.39 0.0
+1.01 3.32 0.0
+1.01 3.25 0.0
+1.01 3.19 0.0
+1.01 3.12 0.0
+1.01 3.05 0.0
+1.02 2.98 0.0
+1.02 2.92 0.0
+1.02 2.85 0.0
+1.02 2.78 0.0
+1.02 2.71 0.0
+1.02 2.64 0.0
+1.02 2.58 0.0
+1.02 2.51 0.0
+1.02 2.44 0.0
+1.02 2.37 0.0
+1.02 2.31 0.0
+1.02 2.24 0.0
+1.02 2.17 0.0
+1.02 2.10 0.0
+1.02 2.03 0.0
+1.02 1.97 0.0
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+1.01 0.34 0.0
+1.01 0.27 0.0
+1.00 0.20 0.0
+1.00 0.14 0.0
+1.00 0.07 0.0
+CELLS 59 118
+1 0
+1 1
+1 2
+1 3
+1 4
+1 5
+1 6
+1 7
+1 8
+1 9
+1 10
+1 11
+1 12
+1 13
+1 14
+1 15
+1 16
+1 17
+1 18
+1 19
+1 20
+1 21
+1 22
+1 23
+1 24
+1 25
+1 26
+1 27
+1 28
+1 29
+1 30
+1 31
+1 32
+1 33
+1 34
+1 35
+1 36
+1 37
+1 38
+1 39
+1 40
+1 41
+1 42
+1 43
+1 44
+1 45
+1 46
+1 47
+1 48
+1 49
+1 50
+1 51
+1 52
+1 53
+1 54
+1 55
+1 56
+1 57
+1 58
+CELL_TYPES 59
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
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+1
+1
+1

BasicSolver/2D-seq/vtk_files/particles10.vtk

@@ -0,0 +1,909 @@
+# vtk DataFile Version 3.0
+PAMPI cfd solver particle tracing file
+ASCII
+DATASET UNSTRUCTURED_GRID
+FIELD FieldData 2
+TIME 1 1 double
+10
+CYCLE 1 1 int
+1
+POINTS 299 float
+1.00 4.00 0.0
+1.24 3.94 0.0
+1.49 3.87 0.0
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+3.84 3.06 0.0
+3.95 3.01 0.0
+4.05 2.95 0.0
+4.14 2.89 0.0
+4.23 2.83 0.0
+4.30 2.77 0.0
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BasicSolver/2D-seq/vtk_files/particles2.vtk

@@ -0,0 +1,189 @@
+# vtk DataFile Version 3.0
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BasicSolver/2D-seq/vtk_files/particles3.vtk

@@ -0,0 +1,369 @@
+# vtk DataFile Version 3.0
+PAMPI cfd solver particle tracing file
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BasicSolver/2D-seq/vtk_files/particles4.vtk

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+# vtk DataFile Version 3.0
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BasicSolver/2D-seq/vtk_files/particles5.vtk

@@ -0,0 +1,549 @@
+# vtk DataFile Version 3.0
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BasicSolver/2D-seq/vtk_files/particles6.vtk

@@ -0,0 +1,549 @@
+# vtk DataFile Version 3.0
+PAMPI cfd solver particle tracing file
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BasicSolver/2D-seq/vtk_files/particles7.vtk

@@ -0,0 +1,729 @@
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BasicSolver/2D-seq/vtk_files/particles8.vtk

@@ -0,0 +1,729 @@
+# vtk DataFile Version 3.0
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