| 1 |
C $Header: $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
# include "GAD_OPTIONS.h" |
| 5 |
|
| 6 |
SUBROUTINE GAD_PQM_ADV_Y(meth,bi,bj,kk, |
| 7 |
I calc_CFL,delT,vvel,vfac,fbar, |
| 8 |
O flux,myThid ) |
| 9 |
C |================================================================| |
| 10 |
C | PQM_ADV_Y: evaluate grid-cell advective flux in Y. | |
| 11 |
C | Lagrangian-type Piecewise Quartic Method (PQM). | |
| 12 |
C |================================================================| |
| 13 |
|
| 14 |
implicit none |
| 15 |
|
| 16 |
C =============================================== global variables |
| 17 |
# include "SIZE.h" |
| 18 |
# include "GRID.h" |
| 19 |
# include "GAD.h" |
| 20 |
|
| 21 |
C ================================================================ |
| 22 |
C meth :: advection method. |
| 23 |
C bi,bj :: tile indexing. |
| 24 |
C kk :: r-index. |
| 25 |
C calc_CFL :: TRUE to calc. CFL from vel. |
| 26 |
C delT :: time-step. |
| 27 |
C vvel :: vel.-comp in y-direction. |
| 28 |
C vfac :: vel.-flux in y-direction. |
| 29 |
C fbar :: grid-cell values. |
| 30 |
C flux :: adv.-flux in y-direction. |
| 31 |
C myThid :: thread number. |
| 32 |
C ================================================================ |
| 33 |
integer meth |
| 34 |
integer bi,bj,kk |
| 35 |
logical calc_CFL |
| 36 |
_RL delT |
| 37 |
_RL vvel(1-OLx:sNx+OLx, |
| 38 |
& 1-OLy:sNy+OLy) |
| 39 |
_RL vfac(1-OLx:sNx+OLx, |
| 40 |
& 1-OLy:sNy+OLy) |
| 41 |
_RL fbar(1-OLx:sNx+OLx, |
| 42 |
& 1-OLy:sNy+OLy) |
| 43 |
_RL flux(1-OLx:sNx+OLx, |
| 44 |
& 1-OLy:sNy+OLy) |
| 45 |
integer myThid |
| 46 |
|
| 47 |
C ================================================================ |
| 48 |
C ix,iy,ir :: grid indexing. |
| 49 |
C floc :: row of grid-cell values. |
| 50 |
C mloc :: row of grid-cell mask values. |
| 51 |
C fhat :: row of poly. coeff. |
| 52 |
C - FHAT(:,I) = PQM coeff. |
| 53 |
C edge :: row of edge-wise values/slopes. |
| 54 |
C - EDGE(1,:) = VALUE. |
| 55 |
C - EDGE(2,:) = DF/DY. |
| 56 |
C ohat :: row of oscl. coeff. |
| 57 |
C - OHAT(1,:) = D^1F/DS^1. |
| 58 |
C - OHAT(2,:) = D^2F/DS^2. |
| 59 |
C ================================================================ |
| 60 |
integer ix,iy |
| 61 |
_RL mloc(1-OLy:sNy+OLy) |
| 62 |
_RL floc(1-OLy:sNy+OLy) |
| 63 |
_RL fhat(1:5, |
| 64 |
& 1-OLy:sNy+OLy) |
| 65 |
_RL edge(1:2, |
| 66 |
& 1-OLy:sNy+OLy) |
| 67 |
_RL ohat(1:2, |
| 68 |
& 1-OLy:sNy+OLy) |
| 69 |
_RL vsum |
| 70 |
|
| 71 |
do ix = 1-OLx+0, sNx+OLx-0 |
| 72 |
C ==================== zero stencil "ghost" cells along boundaries |
| 73 |
flux(ix, +1-OLy+0) = 0. _d 0 |
| 74 |
flux(ix, +1-OLy+1) = 0. _d 0 |
| 75 |
flux(ix, +1-OLy+2) = 0. _d 0 |
| 76 |
flux(ix, +1-OLy+3) = 0. _d 0 |
| 77 |
flux(ix,sNy+OLy-0) = 0. _d 0 |
| 78 |
flux(ix,sNy+OLy-1) = 0. _d 0 |
| 79 |
flux(ix,sNy+OLy-2) = 0. _d 0 |
| 80 |
end do |
| 81 |
|
| 82 |
C ================================================================ |
| 83 |
C (1): copy a single row of data onto contiguous storage, treat |
| 84 |
C as a set of one-dimensional problems. |
| 85 |
C (2): calc. "oscillation-indicators" for each grid-cell if ad- |
| 86 |
C vection scheme is WENO-class. |
| 87 |
C (3): calc. edge-centred values/slopes by high-order interpol- |
| 88 |
C ation. |
| 89 |
C (4): calc. cell-centred polynomial profiles with appropriate |
| 90 |
C slope-limiting. |
| 91 |
C (5): calc. fluxes using a local, semi-lagrangian integration. |
| 92 |
C ================================================================ |
| 93 |
|
| 94 |
do ix = 1-OLx+0, sNx+OLx-0 |
| 95 |
|
| 96 |
vsum = 0.0 _d 0 |
| 97 |
do iy = 1-OLy+0, sNy+OLy-0 |
| 98 |
C ================================== quick break on zero transport |
| 99 |
vsum = vsum |
| 100 |
& + abs(vfac(ix,iy)) |
| 101 |
C ================================== make local unit-stride copies |
| 102 |
floc(iy) = fbar (ix,iy) |
| 103 |
mloc(iy) = |
| 104 |
& maskC(ix,iy,kk,bi,bj) |
| 105 |
end do |
| 106 |
|
| 107 |
if (vsum .gt. 0. _d 0) then |
| 108 |
|
| 109 |
C ==================== reconstruct derivatives for WENO indicators |
| 110 |
if (meth.eq.ENUM_PQM_WENO_LIMIT) then |
| 111 |
CALL GAD_OSC_HAT_Y(bi,bj,kk,ix, |
| 112 |
& mloc,floc, |
| 113 |
& ohat,myThid) |
| 114 |
end if |
| 115 |
|
| 116 |
C ==================== reconstruct 5th--order accurate edge values |
| 117 |
CALL GAD_PQM_P5E_Y(bi,bj,kk,ix, |
| 118 |
& mloc,floc, |
| 119 |
& edge,myThid) |
| 120 |
|
| 121 |
C ==================== reconstruct coeff. for grid-cell poynomials |
| 122 |
CALL GAD_PQM_HAT_Y(bi,bj,kk,ix, |
| 123 |
& meth, |
| 124 |
& mloc,floc, |
| 125 |
& edge,ohat, |
| 126 |
& fhat,myThid) |
| 127 |
|
| 128 |
C ==================== evaluate integral fluxes on grid-cell edges |
| 129 |
CALL GAD_PQM_FLX_Y(bi,bj,kk,ix, |
| 130 |
& calc_CFL, |
| 131 |
& delT,vvel, |
| 132 |
& vfac,fhat, |
| 133 |
& flux,myThid) |
| 134 |
|
| 135 |
else |
| 136 |
|
| 137 |
do iy = 1-OLy+4, sNy+OLy-3 |
| 138 |
C ================================== "null" flux on zero transport |
| 139 |
flux(ix,iy) = 0.0 _d 0 |
| 140 |
end do |
| 141 |
|
| 142 |
end if |
| 143 |
|
| 144 |
end do |
| 145 |
|
| 146 |
return |
| 147 |
|
| 148 |
c end subroutine GAD_PQM_ADV_Y |
| 149 |
end |
Parent Directory
| 
Revision Log
| 
Revision Graph