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boundary_conditions.f90
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subroutine boundary_conditions()
use variables
implicit none
!---------------------------------------------------!
! Boundary conditions calculation !
!---------------------------------------------------!
!!!!!!!!Velocity boundary conditions!!!!!!!!
!West vertical wall
do k=-1,nz+2
do j=-1,ny+2
!-------------------------------------!
if(WestWall_u == 'no-slip') then
u(0,j,k) = 0.0
else if(WestWall_u == 'Neumann') then
u(0,j,k) = u(1,j,k)
else if(WestWall_u == 'Dirichlet') then
u(0,j,k) = 1.0
end if
u(-1,j,k) = u(0,j,k)
!-------------------------------------!
!-------------------------------------!
if(WestWall_v == 'no-slip') then
v(0,j,k) = 2*0-v(1,j,k)
else if(WestWall_v == 'Neumann') then
v(0,j,k) = v(1,j,k)
else if(WestWall_v == 'Dirichlet') then
v(0,j,k) = 2*1-v(1,j,k)
end if
v(-1,j,k) = v(0,j,k)
!-------------------------------------!
!-------------------------------------!
if(WestWall_w == 'no-slip') then
w(0,j,k) = 2*0-w(1,j,k)
else if(WestWall_w == 'Neumann') then
w(0,j,k) = w(1,j,k)
else if(WestWall_w == 'Dirichlet') then
w(0,j,k) = 2*1-w(1,j,k)
end if
w(-1,j,k) = w(0,j,k)
!-------------------------------------!
end do
end do
!East vertical wall
do k=-1,nz+2
do j=-1,ny+2
!-------------------------------------!
if(EastWall_u == 'no-slip') then
u(nx,j,k) = 0.0
else if(EastWall_u == 'Neumann') then
u(nx,j,k) = u(nx-1,j,k)
else if(EastWall_u == 'Dirichlet') then
u(nx,j,k) = 1.0
end if
u(nx+1,j,k) = u(nx,j,k)
u(nx+2,j,k) = u(nx+1,j,k)
!-------------------------------------!
!-------------------------------------!
if(EastWall_v == 'no-slip') then
v(nx+1,j,k) = 2*0-v(nx,j,k)
else if(EastWall_v == 'Neumann') then
v(nx+1,j,k) = v(nx,j,k)
else if(EastWall_v == 'Dirichlet') then
v(nx+1,j,k) = 2*1-v(nx,j,k)
end if
v(nx+2,j,k) = v(nx+1,j,k)
!-------------------------------------!
!-------------------------------------!
if(EastWall_w == 'no-slip') then
w(nx+1,j,k) = 2*0-w(nx,j,k)
else if(EastWall_w == 'Neumann') then
w(nx+1,j,k) = w(nx,j,k)
else if(EastWall_w == 'Dirichlet') then
w(nx+1,j,k) = 2*1-w(nx,j,k)
end if
w(nx+2,j,k) = w(nx+1,j,k)
!-------------------------------------!
end do
end do
!South horizontal wall
do k=-1,nz+2
do i=-1,nx+2
!-------------------------------------!
if(SouthWall_u == 'no-slip') then
u(i,0,k) = 2*0-u(i,1,k)
else if(SouthWall_u == 'Neumann') then
u(i,0,k) = u(i,1,k)
else if(SouthWall_u == 'Dirichlet') then
u(i,0,k) = 2*1-u(i,1,k)
end if
u(i,-1,k) = u(i,0,k)
!-------------------------------------!
!-------------------------------------!
if(SouthWall_v == 'no-slip') then
v(i,0,k) = 0.0
else if(SouthWall_v == 'Neumann') then
v(i,0,k) = v(i,1,k)
else if(SouthWall_v == 'Dirichlet') then
v(i,0,k) = 1.0
end if
v(i,-1,k) = v(i,0,k)
!-------------------------------------!
!-------------------------------------!
if(SouthWall_w == 'no-slip') then
w(i,0,k) = 2*0-w(i,1,k)
else if(SouthWall_w == 'Neumann') then
w(i,0,k) = w(i,1,k)
else if(SouthWall_w == 'Dirichlet') then
w(i,0,k) = 2*1-w(i,1,k)
end if
w(i,-1,k) = w(i,0,k)
!-------------------------------------!
end do
end do
!North horizontal wall
do k=-1,nz+2
do i=-1,nx+2
!-------------------------------------!
if(NorthWall_u == 'no-slip') then
u(i,ny+1,k) = 2*0-u(i,ny,k)
else if(NorthWall_u == 'Neumann') then
u(i,ny+1,k) = u(i,ny,k)
else if(NorthWall_u == 'Dirichlet') then
u(i,ny+1,k) = 2*1-u(i,ny,k)
end if
u(i,ny+2,k) = u(i,ny+1,k)
!-------------------------------------!
!-------------------------------------!
if(NorthWall_v == 'no-slip') then
v(i,ny,k) = 0.0
else if(NorthWall_v == 'Neumann') then
v(i,ny,k) = v(i,ny-1,k)
else if(NorthWall_v == 'Dirichlet') then
v(i,ny,k) = 1.0
end if
v(i,ny+1,k) = v(i,ny,k)
v(i,ny+2,k) = v(i,ny+1,k)
!-------------------------------------!
!-------------------------------------!
if(NorthWall_w == 'no-slip') then
w(i,ny+1,k) = 2*0-w(i,ny,k)
else if(NorthWall_w == 'Neumann') then
w(i,ny+1,k) = w(i,ny,k)
else if(NorthWall_w == 'Dirichlet') then
w(i,ny+1,k) = 2*1-w(i,ny,k)
end if
w(i,ny+2,k) = w(i,ny+1,k)
!-------------------------------------!
end do
end do
!inlet
!Back horizontal wall
do j=-1,ny+2
do i=-1,nx+2
!-------------------------------------!
if(BackWall_u == 'no-slip') then
u(i,j,0) = 2*0-u(i,j,1)
else if(BackWall_u == 'Neumann') then
u(i,j,0) = u(i,j,1)
else if(BackWall_u == 'Dirichlet') then
u(i,j,0) = 2*1-u(i,j,1)
end if
u(i,j,-1) = u(i,j,0)
!-------------------------------------!
!-------------------------------------!
if(BackWall_v == 'no-slip') then
v(i,j,0) = 2*0-v(i,j,1)
else if(BackWall_v == 'Neumann') then
v(i,j,0) = v(i,j,0)
else if(BackWall_v == 'Dirichlet') then
v(i,j,0) = 2*1-v(i,j,1)
end if
v(i,j,-1) = v(i,j,0)
!-------------------------------------!
!-------------------------------------!
if(BackWall_w == 'no-slip') then
w(i,j,0) = 0.0
else if(BackWall_w == 'Neumann') then
w(i,j,0) = w(i,j,1)
else if(BackWall_w == 'Dirichlet') then
w(i,j,0) = 1.0
end if
w(i,j,-1) = w(i,j,0)
!-------------------------------------!
end do
end do
!outlet
!Front horizontal wall
do j=-1,ny+2
do i=-1,nx+2
!-------------------------------------!
if(FrontWall_u == 'no-slip') then
u(i,j,nz+1) = 2*0-u(i,j,nz)
else if(FrontWall_u == 'Neumann') then
u(i,j,nz+1) = u(i,j,nz)
else if(FrontWall_u == 'Dirichlet') then
u(i,j,nz+1) = 2*1-u(i,j,nz)
end if
u(i,j,nz+2) = u(i,j,nz+1)
!-------------------------------------!
!-------------------------------------!
if(FrontWall_v == 'no-slip') then
v(i,j,nz+1) = 2*0-v(i,j,nz)
else if(FrontWall_v == 'Neumann') then
v(i,j,nz+1) = v(i,j,nz)
else if(FrontWall_v == 'Dirichlet') then
v(i,j,nz+1) = 2*1-v(i,j,nz)
end if
v(i,j,nz+2) = v(i,j,nz+1)
!-------------------------------------!
!-------------------------------------!
if(FrontWall_w== 'no-slip') then
w(i,j,nz) = 0.0
else if(FrontWall_w == 'Neumann') then
w(i,j,nz) = w(i,j,nz-1)
else if(FrontWall_w == 'Dirichlet') then
w(i,j,nz) = 1.0
end if
w(i,j,nz+1) = w(i,j,nz)
w(i,j,nz+2) = w(i,j,nz+1)
!-------------------------------------!
end do
end do
do k=-1,nz+2
do j=-1,ny+2
do i=-1,nx+2
u1(i,j,k)=u(i,j,k)
v1(i,j,k)=v(i,j,k)
w1(i,j,k)=w(i,j,k)
u2(i,j,k)=u(i,j,k)
v2(i,j,k)=v(i,j,k)
w2(i,j,k)=w(i,j,k)
u_star(i,j,k)=u(i,j,k)
v_star(i,j,k)=v(i,j,k)
w_star(i,j,k)=w(i,j,k)
end do
end do
end do
!!!!!!!Pressure boundary conditions!!!!!!!
!West vertical wall
do k=-1,nz+2
do j=-1,ny+2
p(0,j,k)=p(1,j,k)
p(-1,j,k)=p(0,j,k)
end do
end do
!East vertical wall
do k=-1,nz+2
do j=-1,ny+2
p(nx+1,j,k)=p(nx,j,k)
p(nx+2,j,k)=p(nx+1,j,k)
end do
end do
!South horizontal wall
do k=-1,nz+2
do i=-1,nx+2
p(i,0,k)=p(i,1,k)
p(i,-1,k)=p(i,0,k)
end do
end do
!North horizontal wall
do k=-1,nz+2
do i=-1,nx+2
p(i,ny+1,k)=p(i,ny,k)
p(i,ny+2,k)=p(i,ny+1,k)
end do
end do
!Back horizontal wall
do j=-1,ny+2
do i=-1,nx+2
p(i,j,0)=p(i,j,1)
p(i,j,-1)=p(i,j,0)
end do
end do
!Front horizontal wall
do j=-1,ny+2
do i=-1,nx+2
p(i,j,nz+1)=p(i,j,nz)
p(i,j,nz+2)=p(i,j,nz+1)
end do
end do
end subroutine boundary_conditions