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* adding dielectric surface charging and dielectric layer boundary conditions --------- Co-authored-by: Hariswaran Sitaraman <[email protected]> Co-authored-by: Hariswaran Sitaraman <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,5 @@ | ||
| CEXE_sources += main.cpp Vidyut.cpp Evolve.cpp Plot.cpp | ||
| CEXE_sources += GridWork.cpp TimeStep.cpp PotentialSolve.cpp ScalarSolve.cpp | ||
| CEXE_sources += ElecEnergySource.cpp PlasmaChem.cpp | ||
| CEXE_sources += ElecEnergySource.cpp PlasmaChem.cpp SurfCharge.cpp | ||
| CEXE_headers += Vidyut.H Tagging.H BCfill.H Constants.H UnivConstants.H VarDefines.H | ||
| CEXE_headers += compute_explicit_flux.H PlasmaChem.H HelperFuncs.H |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| #include <Vidyut.H> | ||
| #include <UserSources.H> | ||
| #include <Chemistry.H> | ||
| #include <UserFunctions.H> | ||
| #include <PlasmaChem.H> | ||
| #include <ProbParm.H> | ||
| #include <AMReX_MLABecLaplacian.H> | ||
| #include <HelperFuncs.H> | ||
|
|
||
| AMREX_GPU_HOST_DEVICE | ||
| AMREX_FORCE_INLINE | ||
| amrex::Real charge_flux(int i,int j,int k, int sgn, int dir, | ||
| const GpuArray<Real,AMREX_SPACEDIM> dx, | ||
| amrex::Real gastemp, | ||
| Array4<Real> const& sb_arr) | ||
| { | ||
| IntVect icell{AMREX_D_DECL(i,j,k)}; | ||
| IntVect icell_prvs{AMREX_D_DECL(i,j,k)}; | ||
| amrex::Real outward_normal[AMREX_SPACEDIM]={0.0}; | ||
| outward_normal[dir]=sgn; | ||
| int cell_adjust; | ||
|
|
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| cell_adjust = (sgn==1)?-1:0; | ||
| icell[dir]+=cell_adjust; | ||
| //i+1 at domain lo and i-1 at | ||
| //domain hi | ||
| icell_prvs[dir]=icell[dir]-sgn; | ||
|
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||
|
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| amrex::Real etemp=sb_arr(icell,ETEMP_ID); | ||
| amrex::Real ebyn=sb_arr(icell,REF_ID); | ||
| amrex::Real efield_mag=sb_arr(icell,EFX_ID)*sb_arr(icell,EFX_ID); | ||
| #if AMREX_SPACEDIM > 1 | ||
| efield_mag += sb_arr(icell,EFY_ID)*sb_arr(icell,EFY_ID); | ||
| #if AMREX_SPACEDIM == 3 | ||
| efield_mag += sb_arr(icell,EFZ_ID)*sb_arr(icell,EFZ_ID); | ||
| #endif | ||
| #endif | ||
| efield_mag=std::sqrt(efield_mag); | ||
| amrex::Real q_times_flux=0.0; | ||
| amrex::Real efield_n=sb_arr(icell,EFX_ID+dir)*outward_normal[dir]; | ||
| amrex::Real numdens=0.0; | ||
| for(int sp=0; sp<NUM_SPECIES; sp++) numdens += sb_arr(icell,sp); | ||
| for(int sp=0;sp<NUM_SPECIES;sp++) | ||
| { | ||
| amrex::Real chrg=plasmachem::get_charge(sp); | ||
|
|
||
| if(amrex::Math::abs(chrg) > 0) | ||
| { | ||
| amrex::Real specdens=sb_arr(icell,sp); | ||
| amrex::Real gradn_n=(sb_arr(icell,sp)-sb_arr(icell_prvs,sp))/dx[dir]; | ||
| amrex::Real mu = specMob(sp, etemp, numdens, efield_mag, gastemp); | ||
| amrex::Real dcoeff = specDiff(sp, etemp, numdens, efield_mag, gastemp); | ||
|
|
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| amrex::Real flx=mu*specdens*efield_n-dcoeff*gradn_n; | ||
|
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| //add only when flux is directed towards the surface | ||
| if(flx > 0.0) | ||
| { | ||
| q_times_flux += chrg*flx; | ||
| } | ||
| } | ||
| } | ||
|
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| q_times_flux*=ECHARGE; | ||
| return(q_times_flux); | ||
| } | ||
|
|
||
| void Vidyut::update_surf_charge(Vector<MultiFab>& Sborder, | ||
| Real current_time, Real dt) | ||
| { | ||
| amrex::Real gastemp=gas_temperature; | ||
| amrex::Real tstep=dt; | ||
| ProbParm const* localprobparm = d_prob_parm; | ||
| for (int ilev = 0; ilev <= finest_level; ilev++) | ||
| { | ||
| // set boundary conditions | ||
| for (MFIter mfi(phi_new[ilev], TilingIfNotGPU()); mfi.isValid(); ++mfi) | ||
| { | ||
| const Box& bx = mfi.tilebox(); | ||
| const auto dx = geom[ilev].CellSizeArray(); | ||
| auto prob_lo = geom[ilev].ProbLoArray(); | ||
| auto prob_hi = geom[ilev].ProbHiArray(); | ||
| const Box& domain = geom[ilev].Domain(); | ||
|
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| Array4<Real> sb_arr = Sborder[ilev].array(mfi); | ||
| Array4<Real> phi_arr = phi_new[ilev].array(mfi); | ||
| Real time = current_time; // for GPU capture | ||
|
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||
| for (int idim = 0; idim < AMREX_SPACEDIM; ++idim) | ||
| { | ||
| //note: bdryLo/bdryHi grabs the face indices from bx that are the boundary | ||
| //since they are face indices, the bdry normal index is 0/n+1, n is number of cells | ||
| //so the ghost cell index at left side is i-1 while it is i on the right | ||
| if (bx.smallEnd(idim) == domain.smallEnd(idim)) | ||
| { | ||
| int sign=-1; | ||
| amrex::ParallelFor(amrex::bdryLo(bx, idim), | ||
| [=] AMREX_GPU_DEVICE(int i, int j, int k) noexcept { | ||
|
|
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| int dielectricflag=user_transport::is_dielectric(i, j, k, idim, sign, | ||
| prob_lo, prob_hi, dx, | ||
| time,*localprobparm); | ||
| if(dielectricflag) | ||
| { | ||
| IntVect icell{AMREX_D_DECL(i,j,k)}; | ||
| int cell_adjust = (sign==1)?-1:0; | ||
| icell[idim]+=cell_adjust; | ||
| amrex::Real q_times_flux=charge_flux(i,j,k,sign,idim, | ||
| dx,gastemp,sb_arr); | ||
| phi_arr(icell,SRFCH_ID)+= q_times_flux*tstep; | ||
| } | ||
| }); | ||
| } | ||
| if (bx.bigEnd(idim) == domain.bigEnd(idim)) | ||
| { | ||
| int sign=1; | ||
| amrex::ParallelFor(amrex::bdryHi(bx, idim), | ||
| [=] AMREX_GPU_DEVICE(int i, int j, int k) noexcept { | ||
|
|
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| int dielectricflag=user_transport::is_dielectric(i, j, k, idim, sign, | ||
| prob_lo, prob_hi, dx, | ||
| time,*localprobparm); | ||
| if(dielectricflag) | ||
| { | ||
| IntVect icell{AMREX_D_DECL(i,j,k)}; | ||
| int cell_adjust = (sign==1)?-1:0; | ||
| icell[idim]+=cell_adjust; | ||
| amrex::Real q_times_flux=charge_flux(i,j,k,sign,idim,dx,gastemp,sb_arr); | ||
| phi_arr(icell,SRFCH_ID)+= q_times_flux*tstep; | ||
| } | ||
| }); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| rm -rf plt* Backtrace* core.* | ||
| rm -rf plt* Backtrace* core.* chk* |
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