void CollisionD2Q9LNP::collide() {
updateNi();
// cout<<"D2Q9 LNP collision"<<endl;
// cout<<"pe:"<<Pe<<endl;
double pref = (PHYS_E_CHARGE * z) / (PHYS_KB * T * Pe);
// cout<<"pref: "<<pref<<endl;
// cout<<"dPsiY: "<<dPsiy[1][lm->n.x/2]<<endl;
// cout<<"dPsiX: "<<dPsix[1][lm->n.x/2]<<endl;
// cout<<"RHS: "<<rhs[1][lm->n.x/2]<<endl;
// cout<<"F_2: "<<f[0][1][lm->n.x/2][2]<<endl;
// cout<<"d2psi = "<<dPsiy[2][lm->n.x/2] - dPsiy[1][lm->n.x/2]<<" = "<<
// (rhs[1][lm->n.x/2] + rhs[2][lm->n.x/2])*0.5<<endl;
// cout<<"pref*dpsiy: "<<-dPsiy[1][lm->n.x/2]*pref<<endl;
for (int j = 0; j < n.y; j++) {
for (int i = 0; i < n.x; i++) {
// cout<<"i: "<<i<<endl;
// cout<<"j: "<<j<<endl;
// if(skip != NULL && skip[j][i]){continue;}
for (int d = 0; d < 9; d++) {
f[0][j][i][d] += w
* (fEq(d, ux[j][i] - pref * dPsix[j][i],
uy[j][i] - pref * dPsiy[j][i], ni[j][i]) - f[0][j][i][d])
+ W[d] * colPrefactor * ni[j][i] * rhs[j][i];
// cout<<"orig f: "<<w*( fEq(d, ux[j][i] - pref*dPsix[j][i],
// uy[j][i] - pref*dPsiy[j][i],
// ni[j][i]) - f[0][j][i][d] )<<endl;
// cout<<"extra f: "<<W[d] * colPrefactor *ni[j][i] * rhs[j][i]<<endl;
// cout<<"RHS: "<<rhs[j][i]<<endl;
}
}
}
updateNi();
double sum = 0;
double sumCol = 0;
for (int j = 0; j < lm->n.y; j++) {
sumCol += ni[j][lm->n.x / 2];
for (int i = 0; i < lm->n.x; i++) {
sum += ni[j][1];
}
}
cout << "SUM: " << sum << ", SUMCOL: " << sumCol << ", SUM/3: " << sum / 3.0
<< endl;
}
void CollisionD2Q9LNPSource::collide(){
cout<<"D2Q9 LNP with source collision"<<endl;
cout<<"pe:"<<Pe<<endl;
for(int j = 0; j < n.y; j++){
for(int i = 0; i < n.x; i++){
for(int d = 0; d < 9; d++){
f[0][j][i][d] += w*( fEq(d, ux[j][i], uy[j][i], ni[j][i]) - f[0][j][i][d] ) +
W[d] * colPrefactor * rhs[j][i];
}
}
}
updateNi();
}
void CollisionD2Q9LNPSource::init(){
cout<<"init LNP with source..."<<endl;
double initConc = 0.0;
ni = allocate2DArray(lm->n.y, lm->n.x);
rhs = allocate2DArray(lm->n.y, lm->n.x);
for(int j = 0; j < lm->n.y; j++){
for(int i = 0; i < lm->n.x; i++){
for(int d = 0; d < lm->UDIRS; d++){
f[0][j][i][d] = fEq(d, 0, 0, j*j);
}
}
}
double colPrefactor = ( 1 - 0.5 * w );
updateNi();
}