ERF_DiffusionSrcForMom_N.cpp File Reference

#include <AMReX.H>
#include <ERF_Diffusion.H>
#include <ERF_IndexDefines.H>

Include dependency graph for ERF_DiffusionSrcForMom_N.cpp:

Functions
void	DiffusionSrcForMom_N (const Box &bxx, const Box &bxy, const Box &bxz, const Array4< Real > &rho_u_rhs, const Array4< Real > &rho_v_rhs, const Array4< Real > &rho_w_rhs, const Array4< const Real > &tau11, const Array4< const Real > &tau22, const Array4< const Real > &tau33, const Array4< const Real > &tau12, const Array4< const Real > &tau13, const Array4< const Real > &tau23, const GpuArray< Real, AMREX_SPACEDIM > &dxInv, const Array4< const Real > &mf_m, const Array4< const Real > &, const Array4< const Real > &)

Function Documentation

DiffusionSrcForMom_N()

void DiffusionSrcForMom_N	(	const Box &	bxx,
		const Box &	bxy,
		const Box &	bxz,
		const Array4< Real > &	rho_u_rhs,
		const Array4< Real > &	rho_v_rhs,
		const Array4< Real > &	rho_w_rhs,
		const Array4< const Real > &	tau11,
		const Array4< const Real > &	tau22,
		const Array4< const Real > &	tau33,
		const Array4< const Real > &	tau12,
		const Array4< const Real > &	tau13,
		const Array4< const Real > &	tau23,
		const GpuArray< Real, AMREX_SPACEDIM > &	dxInv,
		const Array4< const Real > &	mf_m,
		const Array4< const Real > &	,
		const Array4< const Real > &
	)

Function for computing the momentum RHS for diffusion operator without terrain.

Parameters

[in]	bxx	nodal x box for x-mom
[in]	bxy	nodal y box for y-mom
[in]	bxz	nodal z box for z-mom
[out]	rho_u_rhs	RHS for x-mom
[out]	rho_v_rhs	RHS for y-mom
[out]	rho_w_rhs	RHS for z-mom
[in]	tau11	11 stress
[in]	tau22	22 stress
[in]	tau33	33 stress
[in]	tau12	12 stress
[in]	tau13	13 stress
[in]	tau23	23 stress
[in]	dxInv	inverse cell size array
[in]	mf_m	map factor at cell center

{
    BL_PROFILE_VAR("DiffusionSrcForMom_N()",DiffusionSrcForMom_N);
 
    auto dxinv = dxInv[0], dyinv = dxInv[1], dzinv = dxInv[2];
 
    ParallelFor(bxx, bxy, bxz,
    [=] AMREX_GPU_DEVICE (int i, int j, int k)
    {
        Real mf   = mf_m(i,j,0);
 
        rho_u_rhs(i,j,k) -= ( (tau11(i  , j  , k  ) - tau11(i-1, j  ,k  )) * dxinv * mf   // Contribution to x-mom eqn from diffusive flux in x-dir
                            + (tau12(i  , j+1, k  ) - tau12(i  , j  ,k  )) * dyinv * mf   // Contribution to x-mom eqn from diffusive flux in y-dir
                            + (tau13(i  , j  , k+1) - tau13(i  , j  ,k  )) * dzinv );     // Contribution to x-mom eqn from diffusive flux in z-dir;
    },
    [=] AMREX_GPU_DEVICE (int i, int j, int k)
    {
        Real mf   = mf_m(i,j,0);
 
        rho_v_rhs(i,j,k) -= ( (tau12(i+1, j  , k  ) - tau12(i  , j  , k  )) * dxinv * mf   // Contribution to y-mom eqn from diffusive flux in x-dir
                            + (tau22(i  , j  , k  ) - tau22(i  , j-1, k  )) * dyinv * mf   // Contribution to y-mom eqn from diffusive flux in y-dir
                            + (tau23(i  , j  , k+1) - tau23(i  , j  , k  )) * dzinv );     // Contribution to y-mom eqn from diffusive flux in z-dir;
    },
    [=] AMREX_GPU_DEVICE (int i, int j, int k)
    {
        Real mf   = mf_m(i,j,0);
 
        rho_w_rhs(i,j,k) -= ( (tau13(i+1, j  , k  ) - tau13(i  , j  , k  )) * dxinv * mf   // Contribution to z-mom eqn from diffusive flux in x-dir
                            + (tau23(i  , j+1, k  ) - tau23(i  , j  , k  )) * dyinv * mf   // Contribution to z-mom eqn from diffusive flux in y-dir
                            + (tau33(i  , j  , k  ) - tau33(i  , j  , k-1)) * dzinv );     // Contribution to z-mom eqn from diffusive flux in z-dir;
    });
}