Actual source code: water.c

  1: static char help[] = "This example demonstrates the use of DMNetwork interface for solving a steady-state water network model.\n\
  2:                       The water network equations follow those used for the package EPANET\n\
  3:                       The data file format used is from the EPANET package (https://www.epa.gov/water-research/epanet).\n\
  4:                       Run this program: mpiexec -n <n> ./water\n\\n";

  6: /* T
  7:    Concepts: DMNetwork
  8:    Concepts: PETSc SNES solver
  9: */

 11: #include "water.h"
 12: #include <petscdmnetwork.h>

 14: int main(int argc,char ** argv)
 15: {
 16:   PetscErrorCode   ierr;
 17:   char             waterdata_file[PETSC_MAX_PATH_LEN] = "sample1.inp";
 18:   WATERDATA        *waterdata;
 19:   AppCtx_Water     appctx;
 20: #if defined(PETSC_USE_LOG)
 21:   PetscLogStage    stage1,stage2;
 22: #endif
 23:   PetscMPIInt      crank;
 24:   DM               networkdm;
 25:   PetscInt         *edgelist = NULL;
 26:   PetscInt         nv,ne,i;
 27:   const PetscInt   *vtx,*edges;
 28:   Vec              X,F;
 29:   SNES             snes;
 30:   SNESConvergedReason reason;

 32:   PetscInitialize(&argc,&argv,"wateroptions",help);if (ierr) return ierr;
 33:   MPI_Comm_rank(PETSC_COMM_WORLD,&crank);

 35:   /* Create an empty network object */
 36:   DMNetworkCreate(PETSC_COMM_WORLD,&networkdm);

 38:   /* Register the components in the network */
 39:   DMNetworkRegisterComponent(networkdm,"edgestruct",sizeof(struct _p_EDGE_Water),&appctx.compkey_edge);
 40:   DMNetworkRegisterComponent(networkdm,"busstruct",sizeof(struct _p_VERTEX_Water),&appctx.compkey_vtx);

 42:   PetscLogStageRegister("Read Data",&stage1);
 43:   PetscLogStagePush(stage1);
 44:   PetscNew(&waterdata);

 46:   /* READ THE DATA */
 47:   if (!crank) {
 48:     /* READ DATA. Only rank 0 reads the data */
 49:     PetscOptionsGetString(NULL,NULL,"-waterdata",waterdata_file,sizeof(waterdata_file),NULL);
 50:     WaterReadData(waterdata,waterdata_file);

 52:     PetscCalloc1(2*waterdata->nedge,&edgelist);
 53:     GetListofEdges_Water(waterdata,edgelist);
 54:   }
 55:   PetscLogStagePop();

 57:   PetscLogStageRegister("Create network",&stage2);
 58:   PetscLogStagePush(stage2);

 60:   /* Set numbers of nodes and edges */
 61:   DMNetworkSetNumSubNetworks(networkdm,PETSC_DECIDE,1);
 62:   DMNetworkAddSubnetwork(networkdm,"",waterdata->nvertex,waterdata->nedge,edgelist,NULL);
 63:   if (!crank) {
 64:     PetscPrintf(PETSC_COMM_SELF,"water nvertices %D, nedges %D\n",waterdata->nvertex,waterdata->nedge);
 65:   }

 67:   /* Set up the network layout */
 68:   DMNetworkLayoutSetUp(networkdm);

 70:   if (!crank) {
 71:     PetscFree(edgelist);
 72:   }

 74:   /* ADD VARIABLES AND COMPONENTS FOR THE NETWORK */
 75:   DMNetworkGetSubnetwork(networkdm,0,&nv,&ne,&vtx,&edges);

 77:   for (i = 0; i < ne; i++) {
 78:     DMNetworkAddComponent(networkdm,edges[i],appctx.compkey_edge,&waterdata->edge[i],0);
 79:   }

 81:   for (i = 0; i < nv; i++) {
 82:     DMNetworkAddComponent(networkdm,vtx[i],appctx.compkey_vtx,&waterdata->vertex[i],1);
 83:   }

 85:   /* Set up DM for use */
 86:   DMSetUp(networkdm);

 88:   if (!crank) {
 89:     PetscFree(waterdata->vertex);
 90:     PetscFree(waterdata->edge);
 91:   }
 92:   PetscFree(waterdata);

 94:   /* Distribute networkdm to multiple processes */
 95:   DMNetworkDistribute(&networkdm,0);

 97:   PetscLogStagePop();

 99:   DMCreateGlobalVector(networkdm,&X);
100:   VecDuplicate(X,&F);

102:   /* HOOK UP SOLVER */
103:   SNESCreate(PETSC_COMM_WORLD,&snes);
104:   SNESSetDM(snes,networkdm);
105:   SNESSetOptionsPrefix(snes,"water_");
106:   SNESSetFunction(snes,F,WaterFormFunction,NULL);
107:   SNESSetFromOptions(snes);

109:   WaterSetInitialGuess(networkdm,X);
110:   /* VecView(X,PETSC_VIEWER_STDOUT_WORLD); */

112:   SNESSolve(snes,NULL,X);
113:   SNESGetConvergedReason(snes,&reason);

115:   if (reason < 0) SETERRQ(PETSC_COMM_SELF,0,"No solution found for the water network");
116:   /* VecView(X,PETSC_VIEWER_STDOUT_WORLD); */

118:   VecDestroy(&X);
119:   VecDestroy(&F);
120:   SNESDestroy(&snes);
121:   DMDestroy(&networkdm);
122:   PetscFinalize();
123:   return ierr;
124: }

126: /*TEST

128:    build:
129:       depends: waterreaddata.c waterfunctions.c
130:       requires: !complex double define(PETSC_HAVE_ATTRIBUTEALIGNED)

132:    test:
133:       args: -water_snes_converged_reason -options_left no
134:       localrunfiles: wateroptions sample1.inp
135:       output_file: output/water.out
136:       requires: double !complex define(PETSC_HAVE_ATTRIBUTEALIGNED)

138:    test:
139:       suffix: 2
140:       nsize: 3
141:       args: -water_snes_converged_reason -options_left no
142:       localrunfiles: wateroptions sample1.inp
143:       output_file: output/water.out
144:       requires: double !complex define(PETSC_HAVE_ATTRIBUTEALIGNED)

146: TEST*/