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module commun | ||
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type mesh_fields | ||
real(8), dimension(:,:), pointer :: ex, ey | ||
real(8), dimension(:,:), pointer :: bz | ||
end type mesh_fields | ||
type mesh_fields | ||
real(8), dimension(:, :), pointer :: ex, ey | ||
real(8), dimension(:, :), pointer :: bz | ||
end type mesh_fields | ||
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real(8) :: c, csq | ||
real(8) :: pi | ||
real(8) :: c, csq | ||
real(8) :: pi | ||
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integer :: md, nd | ||
integer :: nx, ny | ||
integer :: nstep, nstepmax | ||
integer :: idiag | ||
integer :: md, nd | ||
integer :: nx, ny | ||
integer :: nstep, nstepmax | ||
integer :: idiag | ||
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integer, private :: i, j | ||
integer, private :: i, j | ||
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real(8) :: dt, dx, dy | ||
real(8) :: dimx, dimy | ||
real(8) :: cfl | ||
real(8) :: tfinal | ||
real(8) :: omega | ||
real(8) :: dt, dx, dy | ||
real(8) :: dimx, dimy | ||
real(8) :: cfl | ||
real(8) :: tfinal | ||
real(8) :: omega | ||
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contains | ||
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subroutine readin( ) | ||
subroutine readin() | ||
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implicit none | ||
implicit none | ||
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namelist/donnees/ cfl, & !nbre de Courant | ||
tfinal, & !duree maxi | ||
nstepmax, & !nbre d'iterations maxi | ||
idiag, & !frequence des diagnostics | ||
md,nd, & !nombre d'onde de la solution initiale | ||
nx, ny, & !nombre de points dans les deux directions | ||
dimx, dimy !dimensions du domaine | ||
namelist /donnees/ cfl, & !nbre de Courant | ||
tfinal, & !duree maxi | ||
nstepmax, & !nbre d'iterations maxi | ||
idiag, & !frequence des diagnostics | ||
md, nd, & !nombre d'onde de la solution initiale | ||
nx, ny, & !nombre de points dans les deux directions | ||
dimx, dimy !dimensions du domaine | ||
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!***Initialisation des valeurs pas default | ||
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pi = 4.*atan(1.) | ||
pi = 4.*atan(1.) | ||
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c = 1d0 !celerite de la lumiere | ||
csq = c * c | ||
c = 1d0 !celerite de la lumiere | ||
csq = c*c | ||
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open(10,file="input_data",status='old') | ||
read(10,donnees) | ||
close(10) | ||
open (10, file="input_data", status='old') | ||
read (10, donnees) | ||
close (10) | ||
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write(*,"(a,g12.3)")" largeur dimx = ", dimx | ||
write(*,"(a,g12.3)")" longueur dimy = ", dimy | ||
write(*,"(a,g12.3)")" temps = ", tfinal | ||
write(*,"(a,g12.3)")" nombre nx = ", nx | ||
write(*,"(a,g12.3)")" nombre ny = ", ny | ||
write(*,"(a,g12.3)")" nombre de Courant = ", cfl | ||
write(*,"(a,g12.3)")" frequence des diagnostics = ", idiag | ||
write (*, "(a,g12.3)") " largeur dimx = ", dimx | ||
write (*, "(a,g12.3)") " longueur dimy = ", dimy | ||
write (*, "(a,g12.3)") " temps = ", tfinal | ||
write (*, "(a,g12.3)") " nombre nx = ", nx | ||
write (*, "(a,g12.3)") " nombre ny = ", ny | ||
write (*, "(a,g12.3)") " nombre de Courant = ", cfl | ||
write (*, "(a,g12.3)") " frequence des diagnostics = ", idiag | ||
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end subroutine readin | ||
end subroutine readin | ||
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end module commun |
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function faraday!( fields, ix, jx, iy, jy, dt ) | ||
function faraday!(fields, ix, jx, iy, jy, dt) | ||
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dx, dy = fields.mesh.dx, fields.mesh.dy | ||
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for j=iy:jy, i=ix:jx | ||
dex_dy = (fields.ex[i,j+1]-fields.ex[i,j]) / dy | ||
dey_dx = (fields.ey[i+1,j]-fields.ey[i,j]) / dx | ||
fields.bz[i,j] = fields.bz[i,j] + dt * (dex_dy - dey_dx) | ||
for j = iy:jy, i = ix:jx | ||
dex_dy = (fields.ex[i, j+1] - fields.ex[i, j]) / dy | ||
dey_dx = (fields.ey[i+1, j] - fields.ey[i, j]) / dx | ||
fields.bz[i, j] = fields.bz[i, j] + dt * (dex_dy - dey_dx) | ||
end | ||
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end | ||
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function ampere_maxwell!( fields, ix, jx, iy, jy, dt ) | ||
function ampere_maxwell!(fields, ix, jx, iy, jy, dt) | ||
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dx, dy = fields.mesh.dx, fields.mesh.dy | ||
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for j=iy+1:jy, i=ix:jx | ||
dbz_dy = (fields.bz[i,j]-fields.bz[i,j-1]) / dy | ||
fields.ex[i,j] = fields.ex[i,j] + dt*csq*dbz_dy | ||
for j = iy+1:jy, i = ix:jx | ||
dbz_dy = (fields.bz[i, j] - fields.bz[i, j-1]) / dy | ||
fields.ex[i, j] = fields.ex[i, j] + dt * csq * dbz_dy | ||
end | ||
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for j=iy:jy, i=ix+1:jx | ||
dbz_dx = (fields.bz[i,j]-fields.bz[i-1,j]) / dx | ||
fields.ey[i,j] = fields.ey[i,j] - dt*csq*dbz_dx | ||
for j = iy:jy, i = ix+1:jx | ||
dbz_dx = (fields.bz[i, j] - fields.bz[i-1, j]) / dx | ||
fields.ey[i, j] = fields.ey[i, j] - dt * csq * dbz_dx | ||
end | ||
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end | ||
end | ||
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function periodic_bc!(fields, ix, jx, iy, jy, dt) | ||
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for i = ix:jx | ||
dbz_dy = (fields.bz[i,iy]-fields.bz[i,jy]) / fields.mesh.dy | ||
fields.ex[i,iy] = fields.ex[i,iy] + dt*csq*dbz_dy | ||
fields.ex[i,jy+1] = fields.ex[i,iy] | ||
end | ||
dbz_dy = (fields.bz[i, iy] - fields.bz[i, jy]) / fields.mesh.dy | ||
fields.ex[i, iy] = fields.ex[i, iy] + dt * csq * dbz_dy | ||
fields.ex[i, jy+1] = fields.ex[i, iy] | ||
end | ||
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for j = iy:jy | ||
dbz_dx = (fields.bz[ix,j]-fields.bz[jx,j]) / fields.mesh.dx | ||
fields.ey[ix,j] = fields.ey[ix,j] - dt*csq*dbz_dx | ||
fields.ey[jx+1,j] = fields.ey[ix,j] | ||
dbz_dx = (fields.bz[ix, j] - fields.bz[jx, j]) / fields.mesh.dx | ||
fields.ey[ix, j] = fields.ey[ix, j] - dt * csq * dbz_dx | ||
fields.ey[jx+1, j] = fields.ey[ix, j] | ||
end | ||
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fields.bz[:,jy+1] .= fields.bz[:,iy] | ||
fields.bz[jx+1,:] .= fields.bz[ix,:] | ||
fields.bz[:, jy+1] .= fields.bz[:, iy] | ||
fields.bz[jx+1, :] .= fields.bz[ix, :] | ||
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end |
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