!---------1000K---------! !! !! !!!200k 500K !! !! !! !--------100 K -----------!

program heat_conductionimplicit none

!************** VARIABLES USED ********************

real, dimension(:,:), allocatable:: Tinteger i,j,k,iter,nx,ny,nreal dx,dyreal lb, rb ,tb ,bb,inireal a

!**************************************************

!************* USER INPUT *************************

print*, "enter the totoal number of nodes in x"read*, nx

print*, "enter the totoal number of nodes in y"read*, ny

print*, "enter dx"read*, dx

print*, "enter dy"read*, dy

print*, "enter left boundary condition"read*, lb

print*, "enter right boundary condition"read*, rb

print*, "enter the to boundary condition"read*, tb

print*, "enter the bottom boundary condition"read*, bb

print*, "enter the total number of iterations"read*, iter

!*************************************************

allocate(T(ny,nx))

!***************** INITIALIZING *******************

do i= 1,nyT(i,1) = lbT(i,nx) = rbend do

do i=1,nxT(1,i) = tbT(ny,i) = bbend do

ini = (0.25)*(lb+rb+tb+bb)

do i=2,ny-1do j=2,nx-1

T(1,i) =ini

end do end do

!**************************************************

a=( ((dx**2)*(dy**2))/(2*(dx**2 + dy**2)) )

!*************** SOLVING *************************

do n = 2,iterdo i = 2,ny-1do j = 2,nx-1

T(i,j) = a * (((T(i+1,j) + T(i-1,j) )/dx**2) + ((T(i,j-1) + T(i,j+1) )/dy**2))print*, i, j, n, T(i,j)

end do end do end do

read*, k

end program heat_conduction