c
c
c =====================================================
subroutine ic(maxmx,maxmy,meqn,mbc,mx,my,x,y,dx,dy,q)
c =====================================================
implicit double precision (a-h,o-z)
c
include "cuser.i"
c
dimension q(meqn,1-mbc:maxmx+mbc, 1-mbc:maxmy+mbc)
dimension x(1-mbc:maxmx+mbc),y(1-mbc:maxmy+mbc)
c
c
pi = 4.d0*datan(1.d0)
pi2 = 2.d0*pi
disp = 0.0d0
c
c # circle of concentration 1 against background concentration 0:
do 60 i = 1, mx
if(x(i).ge.disp) then
idisc = 2
r0 = 0.2d0
x0 = .4d0
y0 = .0d0
rhol = 0.1d0
rhor = 1.0d0
pl = 1.d0
pr = 1.d0
ur = 0.d0
ul = 0.d0
vr = 0.d0
vl = 0.d0
else
idisc = 1
x0 = 0.0d0
y0 = 0.0d0
alf = 1.0d0
beta = 0.0d0
rhor = 1.0d0
rhol = 3.81d0
pl = 10.d0
pr = 1.d0
ul = 2.58d0
ur = 0.d0
vr = 0.d0
vl = 0.d0
end if
do 60 j = 1, my
call cellave(x(i)-dx/2.d0,y(j)-dy/2.d0,dx,dy,wl)
q(1,i,j) = wl*rhol + (1.d0-wl)*rhor
q(2,i,j) = q(1,i,j) * (wl*ul + (1.d0-wl)*ur)
q(3,i,j) = q(1,i,j) * (wl*vl + (1.d0-wl)*vr)
q(4,i,j) = wl*(pl/gamma1) + (1.d0-wl)*(pr/gamma1) +
$ .5d0*(q(2,i,j)*q(2,i,j) +
$ q(3,i,j)*q(3,i,j)) / q(1,i,j)
60 continue
return
end