blob: 3c77f6a9772cc1926baff5bbbdd732f22e351dd8 [file] [log] [blame]
c---------------------------------------------------------------------
c---------------------------------------------------------------------
subroutine z_solve
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c Performs line solves in Z direction by first factoring
c the block-tridiagonal matrix into an upper triangular matrix,
c and then performing back substitution to solve for the unknow
c vectors of each line.
c
c Make sure we treat elements zero to cell_size in the direction
c of the sweep.
c---------------------------------------------------------------------
include 'header.h'
include 'work_lhs.h'
integer i, j, k, m, n, ksize
c---------------------------------------------------------------------
c---------------------------------------------------------------------
if (timeron) call timer_start(t_zsolve)
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c This function computes the left hand side for the three z-factors
c---------------------------------------------------------------------
ksize = grid_points(3)-1
c---------------------------------------------------------------------
c Compute the indices for storing the block-diagonal matrix;
c determine c (labeled f) and s jacobians
c---------------------------------------------------------------------
!$omp parallel do default(shared) shared(ksize)
!$omp& private(i,j,k,m,n)
do j = 1, grid_points(2)-2
do i = 1, grid_points(1)-2
do k = 0, ksize
tmp1 = 1.0d+00 / u(1,i,j,k)
tmp2 = tmp1 * tmp1
tmp3 = tmp1 * tmp2
fjac(1,1,k) = 0.0d+00
fjac(1,2,k) = 0.0d+00
fjac(1,3,k) = 0.0d+00
fjac(1,4,k) = 1.0d+00
fjac(1,5,k) = 0.0d+00
fjac(2,1,k) = - ( u(2,i,j,k)*u(4,i,j,k) )
> * tmp2
fjac(2,2,k) = u(4,i,j,k) * tmp1
fjac(2,3,k) = 0.0d+00
fjac(2,4,k) = u(2,i,j,k) * tmp1
fjac(2,5,k) = 0.0d+00
fjac(3,1,k) = - ( u(3,i,j,k)*u(4,i,j,k) )
> * tmp2
fjac(3,2,k) = 0.0d+00
fjac(3,3,k) = u(4,i,j,k) * tmp1
fjac(3,4,k) = u(3,i,j,k) * tmp1
fjac(3,5,k) = 0.0d+00
fjac(4,1,k) = - (u(4,i,j,k)*u(4,i,j,k) * tmp2 )
> + c2 * qs(i,j,k)
fjac(4,2,k) = - c2 * u(2,i,j,k) * tmp1
fjac(4,3,k) = - c2 * u(3,i,j,k) * tmp1
fjac(4,4,k) = ( 2.0d+00 - c2 )
> * u(4,i,j,k) * tmp1
fjac(4,5,k) = c2
fjac(5,1,k) = ( c2 * 2.0d0 * square(i,j,k)
> - c1 * u(5,i,j,k) )
> * u(4,i,j,k) * tmp2
fjac(5,2,k) = - c2 * ( u(2,i,j,k)*u(4,i,j,k) )
> * tmp2
fjac(5,3,k) = - c2 * ( u(3,i,j,k)*u(4,i,j,k) )
> * tmp2
fjac(5,4,k) = c1 * ( u(5,i,j,k) * tmp1 )
> - c2
> * ( qs(i,j,k)
> + u(4,i,j,k)*u(4,i,j,k) * tmp2 )
fjac(5,5,k) = c1 * u(4,i,j,k) * tmp1
njac(1,1,k) = 0.0d+00
njac(1,2,k) = 0.0d+00
njac(1,3,k) = 0.0d+00
njac(1,4,k) = 0.0d+00
njac(1,5,k) = 0.0d+00
njac(2,1,k) = - c3c4 * tmp2 * u(2,i,j,k)
njac(2,2,k) = c3c4 * tmp1
njac(2,3,k) = 0.0d+00
njac(2,4,k) = 0.0d+00
njac(2,5,k) = 0.0d+00
njac(3,1,k) = - c3c4 * tmp2 * u(3,i,j,k)
njac(3,2,k) = 0.0d+00
njac(3,3,k) = c3c4 * tmp1
njac(3,4,k) = 0.0d+00
njac(3,5,k) = 0.0d+00
njac(4,1,k) = - con43 * c3c4 * tmp2 * u(4,i,j,k)
njac(4,2,k) = 0.0d+00
njac(4,3,k) = 0.0d+00
njac(4,4,k) = con43 * c3 * c4 * tmp1
njac(4,5,k) = 0.0d+00
njac(5,1,k) = - ( c3c4
> - c1345 ) * tmp3 * (u(2,i,j,k)**2)
> - ( c3c4 - c1345 ) * tmp3 * (u(3,i,j,k)**2)
> - ( con43 * c3c4
> - c1345 ) * tmp3 * (u(4,i,j,k)**2)
> - c1345 * tmp2 * u(5,i,j,k)
njac(5,2,k) = ( c3c4 - c1345 ) * tmp2 * u(2,i,j,k)
njac(5,3,k) = ( c3c4 - c1345 ) * tmp2 * u(3,i,j,k)
njac(5,4,k) = ( con43 * c3c4
> - c1345 ) * tmp2 * u(4,i,j,k)
njac(5,5,k) = ( c1345 )* tmp1
enddo
c---------------------------------------------------------------------
c now jacobians set, so form left hand side in z direction
c---------------------------------------------------------------------
call lhsinit(lhs, ksize)
do k = 1, ksize-1
tmp1 = dt * tz1
tmp2 = dt * tz2
lhs(1,1,aa,k) = - tmp2 * fjac(1,1,k-1)
> - tmp1 * njac(1,1,k-1)
> - tmp1 * dz1
lhs(1,2,aa,k) = - tmp2 * fjac(1,2,k-1)
> - tmp1 * njac(1,2,k-1)
lhs(1,3,aa,k) = - tmp2 * fjac(1,3,k-1)
> - tmp1 * njac(1,3,k-1)
lhs(1,4,aa,k) = - tmp2 * fjac(1,4,k-1)
> - tmp1 * njac(1,4,k-1)
lhs(1,5,aa,k) = - tmp2 * fjac(1,5,k-1)
> - tmp1 * njac(1,5,k-1)
lhs(2,1,aa,k) = - tmp2 * fjac(2,1,k-1)
> - tmp1 * njac(2,1,k-1)
lhs(2,2,aa,k) = - tmp2 * fjac(2,2,k-1)
> - tmp1 * njac(2,2,k-1)
> - tmp1 * dz2
lhs(2,3,aa,k) = - tmp2 * fjac(2,3,k-1)
> - tmp1 * njac(2,3,k-1)
lhs(2,4,aa,k) = - tmp2 * fjac(2,4,k-1)
> - tmp1 * njac(2,4,k-1)
lhs(2,5,aa,k) = - tmp2 * fjac(2,5,k-1)
> - tmp1 * njac(2,5,k-1)
lhs(3,1,aa,k) = - tmp2 * fjac(3,1,k-1)
> - tmp1 * njac(3,1,k-1)
lhs(3,2,aa,k) = - tmp2 * fjac(3,2,k-1)
> - tmp1 * njac(3,2,k-1)
lhs(3,3,aa,k) = - tmp2 * fjac(3,3,k-1)
> - tmp1 * njac(3,3,k-1)
> - tmp1 * dz3
lhs(3,4,aa,k) = - tmp2 * fjac(3,4,k-1)
> - tmp1 * njac(3,4,k-1)
lhs(3,5,aa,k) = - tmp2 * fjac(3,5,k-1)
> - tmp1 * njac(3,5,k-1)
lhs(4,1,aa,k) = - tmp2 * fjac(4,1,k-1)
> - tmp1 * njac(4,1,k-1)
lhs(4,2,aa,k) = - tmp2 * fjac(4,2,k-1)
> - tmp1 * njac(4,2,k-1)
lhs(4,3,aa,k) = - tmp2 * fjac(4,3,k-1)
> - tmp1 * njac(4,3,k-1)
lhs(4,4,aa,k) = - tmp2 * fjac(4,4,k-1)
> - tmp1 * njac(4,4,k-1)
> - tmp1 * dz4
lhs(4,5,aa,k) = - tmp2 * fjac(4,5,k-1)
> - tmp1 * njac(4,5,k-1)
lhs(5,1,aa,k) = - tmp2 * fjac(5,1,k-1)
> - tmp1 * njac(5,1,k-1)
lhs(5,2,aa,k) = - tmp2 * fjac(5,2,k-1)
> - tmp1 * njac(5,2,k-1)
lhs(5,3,aa,k) = - tmp2 * fjac(5,3,k-1)
> - tmp1 * njac(5,3,k-1)
lhs(5,4,aa,k) = - tmp2 * fjac(5,4,k-1)
> - tmp1 * njac(5,4,k-1)
lhs(5,5,aa,k) = - tmp2 * fjac(5,5,k-1)
> - tmp1 * njac(5,5,k-1)
> - tmp1 * dz5
lhs(1,1,bb,k) = 1.0d+00
> + tmp1 * 2.0d+00 * njac(1,1,k)
> + tmp1 * 2.0d+00 * dz1
lhs(1,2,bb,k) = tmp1 * 2.0d+00 * njac(1,2,k)
lhs(1,3,bb,k) = tmp1 * 2.0d+00 * njac(1,3,k)
lhs(1,4,bb,k) = tmp1 * 2.0d+00 * njac(1,4,k)
lhs(1,5,bb,k) = tmp1 * 2.0d+00 * njac(1,5,k)
lhs(2,1,bb,k) = tmp1 * 2.0d+00 * njac(2,1,k)
lhs(2,2,bb,k) = 1.0d+00
> + tmp1 * 2.0d+00 * njac(2,2,k)
> + tmp1 * 2.0d+00 * dz2
lhs(2,3,bb,k) = tmp1 * 2.0d+00 * njac(2,3,k)
lhs(2,4,bb,k) = tmp1 * 2.0d+00 * njac(2,4,k)
lhs(2,5,bb,k) = tmp1 * 2.0d+00 * njac(2,5,k)
lhs(3,1,bb,k) = tmp1 * 2.0d+00 * njac(3,1,k)
lhs(3,2,bb,k) = tmp1 * 2.0d+00 * njac(3,2,k)
lhs(3,3,bb,k) = 1.0d+00
> + tmp1 * 2.0d+00 * njac(3,3,k)
> + tmp1 * 2.0d+00 * dz3
lhs(3,4,bb,k) = tmp1 * 2.0d+00 * njac(3,4,k)
lhs(3,5,bb,k) = tmp1 * 2.0d+00 * njac(3,5,k)
lhs(4,1,bb,k) = tmp1 * 2.0d+00 * njac(4,1,k)
lhs(4,2,bb,k) = tmp1 * 2.0d+00 * njac(4,2,k)
lhs(4,3,bb,k) = tmp1 * 2.0d+00 * njac(4,3,k)
lhs(4,4,bb,k) = 1.0d+00
> + tmp1 * 2.0d+00 * njac(4,4,k)
> + tmp1 * 2.0d+00 * dz4
lhs(4,5,bb,k) = tmp1 * 2.0d+00 * njac(4,5,k)
lhs(5,1,bb,k) = tmp1 * 2.0d+00 * njac(5,1,k)
lhs(5,2,bb,k) = tmp1 * 2.0d+00 * njac(5,2,k)
lhs(5,3,bb,k) = tmp1 * 2.0d+00 * njac(5,3,k)
lhs(5,4,bb,k) = tmp1 * 2.0d+00 * njac(5,4,k)
lhs(5,5,bb,k) = 1.0d+00
> + tmp1 * 2.0d+00 * njac(5,5,k)
> + tmp1 * 2.0d+00 * dz5
lhs(1,1,cc,k) = tmp2 * fjac(1,1,k+1)
> - tmp1 * njac(1,1,k+1)
> - tmp1 * dz1
lhs(1,2,cc,k) = tmp2 * fjac(1,2,k+1)
> - tmp1 * njac(1,2,k+1)
lhs(1,3,cc,k) = tmp2 * fjac(1,3,k+1)
> - tmp1 * njac(1,3,k+1)
lhs(1,4,cc,k) = tmp2 * fjac(1,4,k+1)
> - tmp1 * njac(1,4,k+1)
lhs(1,5,cc,k) = tmp2 * fjac(1,5,k+1)
> - tmp1 * njac(1,5,k+1)
lhs(2,1,cc,k) = tmp2 * fjac(2,1,k+1)
> - tmp1 * njac(2,1,k+1)
lhs(2,2,cc,k) = tmp2 * fjac(2,2,k+1)
> - tmp1 * njac(2,2,k+1)
> - tmp1 * dz2
lhs(2,3,cc,k) = tmp2 * fjac(2,3,k+1)
> - tmp1 * njac(2,3,k+1)
lhs(2,4,cc,k) = tmp2 * fjac(2,4,k+1)
> - tmp1 * njac(2,4,k+1)
lhs(2,5,cc,k) = tmp2 * fjac(2,5,k+1)
> - tmp1 * njac(2,5,k+1)
lhs(3,1,cc,k) = tmp2 * fjac(3,1,k+1)
> - tmp1 * njac(3,1,k+1)
lhs(3,2,cc,k) = tmp2 * fjac(3,2,k+1)
> - tmp1 * njac(3,2,k+1)
lhs(3,3,cc,k) = tmp2 * fjac(3,3,k+1)
> - tmp1 * njac(3,3,k+1)
> - tmp1 * dz3
lhs(3,4,cc,k) = tmp2 * fjac(3,4,k+1)
> - tmp1 * njac(3,4,k+1)
lhs(3,5,cc,k) = tmp2 * fjac(3,5,k+1)
> - tmp1 * njac(3,5,k+1)
lhs(4,1,cc,k) = tmp2 * fjac(4,1,k+1)
> - tmp1 * njac(4,1,k+1)
lhs(4,2,cc,k) = tmp2 * fjac(4,2,k+1)
> - tmp1 * njac(4,2,k+1)
lhs(4,3,cc,k) = tmp2 * fjac(4,3,k+1)
> - tmp1 * njac(4,3,k+1)
lhs(4,4,cc,k) = tmp2 * fjac(4,4,k+1)
> - tmp1 * njac(4,4,k+1)
> - tmp1 * dz4
lhs(4,5,cc,k) = tmp2 * fjac(4,5,k+1)
> - tmp1 * njac(4,5,k+1)
lhs(5,1,cc,k) = tmp2 * fjac(5,1,k+1)
> - tmp1 * njac(5,1,k+1)
lhs(5,2,cc,k) = tmp2 * fjac(5,2,k+1)
> - tmp1 * njac(5,2,k+1)
lhs(5,3,cc,k) = tmp2 * fjac(5,3,k+1)
> - tmp1 * njac(5,3,k+1)
lhs(5,4,cc,k) = tmp2 * fjac(5,4,k+1)
> - tmp1 * njac(5,4,k+1)
lhs(5,5,cc,k) = tmp2 * fjac(5,5,k+1)
> - tmp1 * njac(5,5,k+1)
> - tmp1 * dz5
enddo
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c performs guaussian elimination on this cell.
c
c assumes that unpacking routines for non-first cells
c preload C' and rhs' from previous cell.
c
c assumed send happens outside this routine, but that
c c'(KMAX) and rhs'(KMAX) will be sent to next cell.
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c outer most do loops - sweeping in i direction
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c multiply c(i,j,0) by b_inverse and copy back to c
c multiply rhs(0) by b_inverse(0) and copy to rhs
c---------------------------------------------------------------------
call binvcrhs( lhs(1,1,bb,0),
> lhs(1,1,cc,0),
> rhs(1,i,j,0) )
c---------------------------------------------------------------------
c begin inner most do loop
c do all the elements of the cell unless last
c---------------------------------------------------------------------
do k=1,ksize-1
c---------------------------------------------------------------------
c subtract A*lhs_vector(k-1) from lhs_vector(k)
c
c rhs(k) = rhs(k) - A*rhs(k-1)
c---------------------------------------------------------------------
call matvec_sub(lhs(1,1,aa,k),
> rhs(1,i,j,k-1),rhs(1,i,j,k))
c---------------------------------------------------------------------
c B(k) = B(k) - C(k-1)*A(k)
c call matmul_sub(aa,i,j,k,c,cc,i,j,k-1,c,bb,i,j,k)
c---------------------------------------------------------------------
call matmul_sub(lhs(1,1,aa,k),
> lhs(1,1,cc,k-1),
> lhs(1,1,bb,k))
c---------------------------------------------------------------------
c multiply c(i,j,k) by b_inverse and copy back to c
c multiply rhs(i,j,1) by b_inverse(i,j,1) and copy to rhs
c---------------------------------------------------------------------
call binvcrhs( lhs(1,1,bb,k),
> lhs(1,1,cc,k),
> rhs(1,i,j,k) )
enddo
c---------------------------------------------------------------------
c Now finish up special cases for last cell
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c rhs(ksize) = rhs(ksize) - A*rhs(ksize-1)
c---------------------------------------------------------------------
call matvec_sub(lhs(1,1,aa,ksize),
> rhs(1,i,j,ksize-1),rhs(1,i,j,ksize))
c---------------------------------------------------------------------
c B(ksize) = B(ksize) - C(ksize-1)*A(ksize)
c call matmul_sub(aa,i,j,ksize,c,
c $ cc,i,j,ksize-1,c,bb,i,j,ksize)
c---------------------------------------------------------------------
call matmul_sub(lhs(1,1,aa,ksize),
> lhs(1,1,cc,ksize-1),
> lhs(1,1,bb,ksize))
c---------------------------------------------------------------------
c multiply rhs(ksize) by b_inverse(ksize) and copy to rhs
c---------------------------------------------------------------------
call binvrhs( lhs(1,1,bb,ksize),
> rhs(1,i,j,ksize) )
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c---------------------------------------------------------------------
c back solve: if last cell, then generate U(ksize)=rhs(ksize)
c else assume U(ksize) is loaded in un pack backsub_info
c so just use it
c after call u(kstart) will be sent to next cell
c---------------------------------------------------------------------
do k=ksize-1,0,-1
do m=1,BLOCK_SIZE
do n=1,BLOCK_SIZE
rhs(m,i,j,k) = rhs(m,i,j,k)
> - lhs(m,n,cc,k)*rhs(n,i,j,k+1)
enddo
enddo
enddo
enddo
enddo
if (timeron) call timer_stop(t_zsolve)
return
end