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add slipping velocity BC for CPU; to be built

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This commit is contained in:
Rex Zhe Li 2021-05-20 20:31:40 -04:00
parent c7c36b5e86
commit fce45fece3
1 changed files with 51 additions and 0 deletions
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51
cpu/D3Q7BC.cpp
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@ -30,6 +30,57 @@ extern "C" void ScaLBL_Solid_Neumann_D3Q7(double *dist,double *BoundaryValue,int
}
}
extern "C" void ScaLBL_Solid_SlippingVelocityBC_D3Q19(double *dist, double *zeta_potential, double *ElectricField, double *SolidGrad,
double epsilon_LB, double tau, double rho0,double den_scale, double h, double time_conv,
int *BounceBackDist_list, int *BounceBackSolid_list, int *FluidBoundary_list,
double *lattice_weight, float *lattice_cx, float *lattice_cy, float *lattice_cz,
int count, int Np){
int idx;
int iq,ib,ifluidBC;
double value_b,value_q;
double Ex,Ey,Ez;
double Etx,Ety,Etz;//tangential part of electric field
double E_mag_normal;
double nsx,nsy,nsz;//unit normal solid gradient
double ubx,uby,ubz;//slipping velocity at fluid boundary nodes
float cx,cy,cz;//lattice velocity (D3Q19)
double LB_weight;//lattice weighting coefficient (D3Q19)
double cs2_inv = 3.0;//inverse of cs^2 for D3Q19
double nu_LB = (tau-0.5)/cs2_inv;
for (idx=0; idx<Np; idx++){
iq = BounceBackDist_list[idx];
ib = BounceBackSolid_list[idx];
ifluidBC = FluidBoundary_list[idx];
value_b = zeta_potential[ib];//get zeta potential from a solid site
value_q = dist[iq];
//Load electric field and compute its tangential componet
Ex = ElectricField[ifluidBC+0*Np];
Ey = ElectricField[ifluidBC+1*Np];
Ez = ElectricField[ifluidBC+2*Np];
nsx = SolidGrad[ifluidBC+0*Np];
nsy = SolidGrad[ifluidBC+1*Np];
nsz = SolidGrad[ifluidBC+2*Np];
E_mag_normal = Ex*nsx+Ey*nsy+Ez*nsz;//magnitude of electric field in the direction normal to solid nodes
//compute tangential electric field
Etx = Ex - E_mag_normal*nsx;
Ety = Ey - E_mag_normal*nsy;
Etz = Ez - E_mag_normal*nsz;
ubx = -epsilon_LB*value_b*Etx/(nu_LB*rho0)*time_conv*time_conv/(h*h*1.0e-12)/den_scale;
uby = -epsilon_LB*value_b*Ety/(nu_LB*rho0)*time_conv*time_conv/(h*h*1.0e-12)/den_scale;
ubz = -epsilon_LB*value_b*Etz/(nu_LB*rho0)*time_conv*time_conv/(h*h*1.0e-12)/den_scale;
//compute bounce-back distribution
LB_weight = lattice_weight[idx];
cx = lattice_cx[idx];
cy = lattice_cy[idx];
cz = lattice_cz[idx];
dist[iq] = value_q - 2.0*LB_weight*rho0*cs2_inv*(cx*ubx+cy*uby+cz*ubz);
}
}
extern "C" void ScaLBL_D3Q7_AAeven_Poisson_Potential_BC_z(int *list, double *dist, double Vin, int count, int Np){
for (int idx=0; idx<count; idx++){
int n = list[idx];