qinit.f.html | ![]() |
Source file: qinit.f | |
Directory: /Users/rjl/git/rjleveque/clawpack-4.6.3/apps/acoustics/2d/example1/1drad | |
Converted: Mon Jan 21 2013 at 20:15:17 using clawcode2html | |
This documentation file will not reflect any later changes in the source file. |
c c c ========================================================= subroutine qinit(maxmx,meqn,mbc,mx,xlower,dx,q,maux,aux) c ========================================================= c c # Set initial conditions for q. c # Pulse in pressure, zero velocity c c implicit double precision (a-h,o-z) dimension q(1-mbc:maxmx+mbc, meqn) dimension aux(1-mbc:maxmx+mbc, *) c pi = 4.d0*datan(1.d0) width = 0.2d0 c do 150 i=1,mx xcell = xlower + (i-0.5d0)*dx if (dabs(xcell-0.5d0) .le. width) then pressure = 1.d0 + dcos(pi*(xcell - 0.5d0)/width) else pressure = 0.d0 endif q(i,1) = pressure q(i,2) = 0.d0 150 continue c return end