int main(){
cout<<"Poiseuille flow..."<<endl;
int nx = 101;
int ny = 21;
int tMax = 5000;
double w = 1.0;
double c = 1.0;
CollisionD2Q9BGK *cm = new CollisionD2Q9BGK();
StreamD2Q9 *sm = new StreamD2Q9();
LatticeModel *lm = new Lattice2D(nx, ny);
LBM *lbm = new LBM(lm, cm, sm);
cm->setW(w);
cm->setC(c);
/* Add boundary nodes */
BounceBackNodes<CollisionD2Q9BGK> *bbns =
new BounceBackNodes<CollisionD2Q9BGK>();
bbns->setCollisionModel(cm);
for(int i = 0; i < nx; i++){
bbns->addNode(i, 0, 0);
bbns->addNode(i, ny-1, 0);
}
//bbns->addNode(nx/2, ny/2, 0);
lbm->addBoundaryNodes(bbns);
/* Set in/outlet conditions*/
HeZouPressureNodes *cpBdry = new HeZouPressureNodes();
for(int j = 1; j < ny-1; j++){
cpBdry->addNode(nx-1, j, 0, 1.0);
cpBdry->addNode(0, j, 0, 1.1);
}
lbm->addBoundaryNodes(cpBdry);
/* Initialize solver */
lbm->init();
/* Main loop */
for(int t = 0; t < tMax; t++){
cout<<t<<endl;
lbm->collideAndStream();
}
//lbm->calcMacroscopicVars();
cm->dataToFile("bench_poi/");
cout<<"DONE!"<<endl;
return 0;
}
int main(){
int nx = 65, ny = 65, tMax = 12000;
int sd = 32;
double w = 0.5;
double c = 1.0;
double dPdx = 1e-6;
double **fx = allocate2DArray(ny, nx);
double **fy = allocate2DArray(ny, nx);
cout<<"Square array flow..."<<endl;
LatticeModel *lm = new Lattice2D(nx, ny);
StreamD2Q9Periodic *sm = new StreamD2Q9Periodic();
CollisionD2Q9BGKShanChenForce *cm = new CollisionD2Q9BGKShanChenForce();
cm->setW(w);
cm->setC(c);
LBM *lbm = new LBM(lm, cm, sm);
/* Set boundary conditions*/
BounceBackNodes<CollisionD2Q9BGKShanChenForce> *bbns =
new BounceBackNodes<CollisionD2Q9BGKShanChenForce>();
bbns->setCollisionModel(cm);
//add square
int start = ((nx-1) - sd)/2;
for(int i = start; i < start + sd +1; i++){
bbns->addNode(i, start, 0);
bbns->addNode(i, ny-1-start, 0);
}
for(int i = start + 1; i < start + sd; i++){
bbns->addNode(start, i, 0);
bbns->addNode(nx-1-start, i, 0);
}
lbm->addBoundaryNodes(bbns);
/* Set force */
for(int i = 0; i < nx; i++){
for(int j = 0; j < ny; j++){
fx[j][i] = dPdx;
fy[j][i] = 0.0;
}
}
/* Initialize solver */
lbm->init();
cm->setForce(fx, fy);
/* Main loop */
for(int t = 0; t < tMax; t++){
cout<<t<<endl;
lbm->collideAndStream();
}
cm->dataToFile("vis_scripts/bench_square_array/");
cout<<"done array."<<endl;
return 0;
}
int main() {
omp_set_num_threads(1);
int nx = 500, ny = 150, tMax = 50000, tMod = 100;
double w = 1.89;
double c = 1.0;
double **fx = allocate2DArray(ny, nx);
double **fy = allocate2DArray(ny, nx);
cout << "Karman vortex street..." << endl;
LatticeModel *lm = new Lattice2D(nx, ny);
//StreamD2Q9Periodic *sm = new StreamD2Q9Periodic();
StreamD2Q9 *sm = new StreamD2Q9();
CollisionD2Q9BGKNSF *cm = new CollisionD2Q9BGKNSF();
cm->setW(w);
cm->setC(c);
LBM *lbm = new LBM(lm, cm, sm);
/* Set boundary conditions*/
BounceBackNodes<CollisionD2Q9BGKNSF> *bbns = new BounceBackNodes<
CollisionD2Q9BGKNSF>();
bbns->setCollisionModel(cm);
for (int i = 0; i < nx; i++) {
bbns->addNode(i, 0, 0);
bbns->addNode(i, ny - 1, 0);
}
// add cylindrical obstacle
int xc = nx / 4, yc = ny / 2;
double r = ny / 15.0;
for (int i = 0; i < nx; i++) {
for (int j = 0; j < ny; j++) {
if (sqrt((double) ((i - xc) * (i - xc) + (j - yc) * (j - yc))) < r) {
bbns->addNode(i, j, 0);
}
}
}
lbm->addBoundaryNodes(bbns);
/* Set force */
for (int i = 0; i < nx; i++) {
for (int j = 0; j < ny; j++) {
fx[j][i] = 0.000005;
fy[j][i] = 0.0;
}
}
cm->setForce(fx, fy);
/* Initialize solver */
lbm->init();
stringstream ss;
string base = "vis_scripts/bench_karman_vortex/";
/* Main loop */
for (int t = 0; t < tMax; t++) {
cout << t << endl;
lbm->collideAndStream();
// write result to file
if (t % tMod == 0) {
ss.str("");
ss << base << "KV";
ss << t / tMod << "/";
createDirectory(ss.str());
cm->dataToFile(ss.str());
}
// if(t == 3500){
// for(int i = 0; i < nx; i++){
// for(int j = 0; j < ny; j++){
// fx[j][i] = 0.0;
// fy[j][i] = 0.0;
// }
// }
//
// }
}
//cm->dataToFile("vis_scripts/bench_karman_vortex/");
cout << "done cyl." << endl;
return 0;
}
int main(){
cout<<"2D, NS <-> PE <-> NP"<<endl;
/* Parameter definitions */
int nx = 101;
int ny = 101;
int sd = 51;
int tNP = 150;
int tPE = 10000;
int tNS = tNP;//tNP;
int tMain = 20;
int tMod = 1; //undersök i detalj.... ok.
double l0 = 10e-6/(ny-1); //PE, NP
double C0 = 1e-4*PHYS_N_A; //NP
double u0 = 1e-3; //NP, NS
double dt = 1.0;
double V0 = -50e-3; //PE
double rho0 = 1e3; //NS
double nu = 1.0e-6; //m^2/s
double D = 1.0e-10; //m^2/s
double u0x = 0.0;
double T = 293;
double eps_r = 80;
double rho_surface = -0.5e-1;//-50e-3*eps_r*PHYS_EPS0/1e-7/V0*l0;
double bulk_charge = 1.0;
double gamma = PHYS_E_CHARGE/(PHYS_KB*T);
double dPdx = 0.5e-3;//1e3 * l0/(rho0 * u0 * u0); //lattice units
double bulkConductivity = 1.5e-3; //conductivity [S/m]
double Pe = u0*l0/D;
double Re = u0*1e4*l0/nu;
double wNP = 1.0/(3.0/Pe + 0.5);
double wPE = 1.0;
double wNS = 1.0/(3.0/Re + 0.5);
/*print parameters*/
printLine(20);
cout<<"DIM = ("<<nx<<", "<<ny<<")"<<endl;
cout<<"T = "<<T<<endl;
cout<<"RHO_SURFACE = "<<rho_surface<<", "<<rho_surface*V0/l0*PHYS_EPS0*eps_r<<" C/M^2"<<endl;
cout<<"BULK_CHARGE = "<<bulk_charge<<endl;
cout<<"PE = "<<Pe<<endl;
cout<<endl;
cout<<"w_np = "<<wNP<<endl;
cout<<"w_pe = "<<wPE<<endl;
cout<<endl;
cout<<"l0 = "<<l0<<endl;
cout<<"V0 = "<<V0<<endl;
cout<<"GAMMA: "<<gamma<<endl;
cout<<"l0*gamma/Pe *V0/l0 = "<<l0*gamma/Pe*V0/l0<<endl;
cout<<"l0^2*gamma/Pe *V0/l0^2 = "<<l0*l0*gamma/Pe*V0/l0/l0<<endl;
cout<<"1/Pe = "<<1/Pe<<endl;
cout<<"dPdx = "<<dPdx<<endl;
printLine(20);
/* Allocate memory for velocity and grad. potential arrays */
double **ux = allocate2DArray(ny, nx);
double **uy = allocate2DArray(ny, nx);
double **dPsix = allocate2DArray(ny, nx);
double **dPsiy = allocate2DArray(ny, nx);
double **rho_eps = allocate2DArray(ny, nx);
double **fx = allocate2DArray(ny, nx);
double **fy = allocate2DArray(ny, nx);
for(int j = 0; j < ny; j++){
for(int i = 0; i < nx; i++){
ux[j][i] = 0;
uy[j][i] = 0;
fx[j][i] = 0;
fy[j][i] = 0;
dPsix[j][i] = 0.0;
dPsiy[j][i] = 0.0;
rho_eps[j][i] = 0.0;//-l0*l0/V0*2*PHYS_E_CHARGE*C0/(eps_r *PHYS_EPS0)*\
(cos(j*2*M_PI/(ny-1)) + 1)*0.5;
}
}
/* Poisson eq. solver */
CollisionD2Q9BGKPE *cmPE = new CollisionD2Q9BGKPE();
StreamD2Q9Periodic *smPE = new StreamD2Q9Periodic();
Lattice2D *lmPE = new Lattice2D(nx, ny);
UnitHandlerLPM *uhPE = new UnitHandlerLPM();
cmPE->setRHS(rho_eps);
cmPE->setW(wPE);
cmPE->setC(1.0);
cmPE->setUnitHandler(uhPE);
uhPE->setCharLength(l0);
uhPE->setCharVoltage(V0);
uhPE->setTimeStep(1.0);
LBM *lbmPE = new LBM(lmPE, cmPE, smPE);
lbmPE->init();
// HeZouLPMChaiNodes *bds = new HeZouLPMChaiNodes();
// bds->setCollisionModel(cmPE);
// for(int i = 0; i < nx; i++){
// bds->addNode(i, 0, 0, 1.0/1.8);
// bds->addNode(i, ny-1, 0, 1.0/1.8);
// }
/* Boundary conds. for Poission solver */
NeumannNodesPESlip *bds = new NeumannNodesPESlip();
lbmPE->addBoundaryNodes(bds);
bds->setCollisionModel(cmPE);
int start = ((nx-1) - sd)/2;
for(int i = start+1; i < nx-start-1; i++){
bds->addNode(i, start, 0, rho_surface, 2);
bds->addNode(i, ny-1-start, 0, rho_surface, 4);
bds->addNode(start, i, 0, rho_surface, 1);
bds->addNode(nx-1-start, i, 0, rho_surface, 3);
}
//corner nodes..
bds->addNode(start, start, 0, rho_surface, 6);
bds->addNode(start, ny-1-start, 0, rho_surface, 7);//7
bds->addNode(nx-1-start, start, 0, rho_surface, 5);//5
bds->addNode(nx-1-start, ny-1-start, 0, rho_surface, 8);//8
bds->init();
/* Nernst Planck solver */
CollisionD2Q9AD *cmNPneg = new CollisionD2Q9AD();
CollisionD2Q9AD *cmNPpos = new CollisionD2Q9AD();
StreamD2Q9Periodic *sm = new StreamD2Q9Periodic();
LatticeModel *lm = new Lattice2D(nx, ny);
StreamD2Q9Periodic *sm2 = new StreamD2Q9Periodic();
LatticeModel *lm2 = new Lattice2D(nx, ny);
cmNPneg->setW(wNP);
cmNPneg->setC(1);
cmNPneg->setZ(-1);
cmNPneg->setInitC(bulk_charge);
cmNPneg->setUx(ux);
cmNPneg->setUy(uy);
cmNPneg->setDPsix(dPsix);
cmNPneg->setDPsiy(dPsiy);
cmNPneg->setT(T);
cmNPneg->setPe(Pe);
//cmNPneg->setRHS(rho_eps);
cmNPpos->setW(wNP);
cmNPpos->setC(1);
cmNPpos->setZ(1);
cmNPpos->setInitC(bulk_charge);
cmNPpos->setUx(ux);
cmNPpos->setUy(uy);
cmNPpos->setDPsix(dPsix);
cmNPpos->setDPsiy(dPsiy);
cmNPpos->setT(T);
cmNPpos->setPe(Pe);
//cmNPpos->setRHS(rho_eps);
LBM *lbmNPneg = new LBM(lm, cmNPneg, sm);
LBM *lbmNPpos = new LBM(lm2, cmNPpos, sm2);
/* Boundary conds for NP solver*/
SlipNodes<CollisionD2Q9AD> *bbnNeg = new SlipNodes<CollisionD2Q9AD>();
lbmNPneg->addBoundaryNodes(bbnNeg);
bbnNeg->setCollisionModel(cmNPneg);
for(int i = start + 1 ; i < nx - start - 1; i++){
bbnNeg->addNode(i, start, 0, 2);
bbnNeg->addNode(i, ny-1-start, 0, 4);
bbnNeg->addNode(start, i, 0, 1);
bbnNeg->addNode(nx-1-start, i, 0, 3);
}
//corner nodes
bbnNeg->addNode(start, start, 0, 6);
bbnNeg->addNode(start, ny-1-start, 0, 7);
bbnNeg->addNode(nx-1-start, start, 0, 5);
bbnNeg->addNode(nx-1-start, ny-1-start, 0, 8);
bbnNeg->init();
SlipNodes<CollisionD2Q9AD> *bbnPos = new SlipNodes<CollisionD2Q9AD>();
lbmNPpos->addBoundaryNodes(bbnPos);
bbnPos->setCollisionModel(cmNPpos);
for(int i = start + 1; i < nx - start - 1; i++){
bbnPos->addNode(i, start, 0, 2);
bbnPos->addNode(i, ny-1-start, 0, 4);
bbnPos->addNode(start, i, 0, 1);
bbnPos->addNode(nx-1-start, i, 0, 3);
}
bbnPos->addNode(start, start, 0, 6);
bbnPos->addNode(start, ny-1-start, 0, 7);
bbnPos->addNode(nx-1-start, start, 0, 5);
bbnPos->addNode(nx-1-start, ny-1-start, 0, 8);
bbnPos->init();
/* Initialize solver */
lbmNPneg->init();
lbmNPpos->init();
/* NS Solver */
CollisionD2Q9BGKNSF *cmNS = new CollisionD2Q9BGKNSF();
StreamD2Q9Periodic *smNS = new StreamD2Q9Periodic();
Lattice2D *lmNS = new Lattice2D(nx, ny);
cmNS->setW(wNS);
cmNS->setC(1.0);
LBM *lbmNS = new LBM(lmNS, cmNS, smNS);
/* Set boundary conditions for flow */
BounceBackNodes<CollisionD2Q9BGKNSF> *bbNS =
new BounceBackNodes<CollisionD2Q9BGKNSF>();
bbNS->setCollisionModel(cmNS);
for(int i = start; i < start + sd +1; i++){
bbNS->addNode(i, start, 0);
bbNS->addNode(i, ny-1-start, 0);
}
for(int i = start + 1; i < start + sd; i++){
bbNS->addNode(start, i, 0);
bbNS->addNode(nx-1-start, i, 0);
}
lbmNS->addBoundaryNodes(bbNS);
lbmNS->init();
cmNS->setForce(fx, fy);
/* Main loops */
for(int tt = 0; tt < tMain; tt++){
cout<<"TT: "<<tt<<endl;
// if(tt == 12){ tNP = 8; tNS = 8;}
/* Update net charge density */
updateRho(rho_eps, cmNPneg, cmNPpos, lm, eps_r, V0, l0, C0);
cmPE->reset();
for(int t = 0; t < tPE; t++){
//cout<<"tPE "<<t<<endl;
lbmPE->collideAndStream();
}
cmPE->getDPsi(dPsix, dPsiy);
//scale potential gradients to SI units *l0
rescale2DArray(dPsix, V0, ny, nx);
rescale2DArray(dPsiy, V0, ny, nx);
for(int t = 0; t < tNP; t++){
lbmNPneg->collideAndStream();
lbmNPpos->collideAndStream();
}
updateForce(fx, fy, ux, uy, rho_eps,\
lmNS, eps_r, u0, l0, V0, C0,\
bulkConductivity, dPdx, cmNPpos, cmNPneg);
for(int t = 0; t < tNS; t++){
lbmNS->collideAndStream();
}
/* update velocities */
cmNS->getU(ux, uy);
/*write result to file*/
stringstream ss;
string base = "vis_scripts/data";
if(tt % tMod == 0){
//dPsiY
ss.str("");
ss<<base<<"PSI";
ss<<tt/tMod<<"/";
createDirectory(ss.str());
ss<<"dpsiy.csv";
write2DArray(dPsiy, NULL, ss.str(), nx, ny);
//potential
ss.str("");
ss<<base<<"PE";
ss<<tt/tMod<<"/";
createDirectory(ss.str());
ss<<"rho.csv";
cmPE->dataToFile(ss.str());
//C_neg
ss.str("");
ss<<base<<"NP";
ss<<tt/tMod<<"/";
createDirectory(ss.str());
ss<<"ni_neg.csv";
cmNPneg->dataToFile(ss.str());
//C_pos
ss.str("");
ss<<base<<"NP";
ss<<tt/tMod<<"/";
ss<<"ni_pos.csv";
cmNPpos->dataToFile(ss.str());
//U and rho_m
ss.str("");
ss<<base<<"NS";
ss<<tt/tMod<<"/";
createDirectory(ss.str());
cmNS->dataToFile(ss.str());
//fx
ss.str("");
ss<<base<<"FX";
ss<<tt/tMod<<"/";
createDirectory(ss.str());
ss<<"fx.csv";
write2DArray(fx, NULL, ss.str(), nx, ny);
}
}
cout<<"done LNP."<<endl;
return 0;
}