tupdate pressure definition to 1st order central difference - sphere - GPU-based 3D discrete element method algorithm with optional fluid coupling
  HTML git clone git://src.adamsgaard.dk/sphere
   DIR Log
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       ---
   DIR commit ecec58505dd46840329f1d2e895aa3d0538228b5
   DIR parent 25aaf8dd3bd580680e694d55409be431a892e93b
  HTML Author: Anders Damsgaard <anders.damsgaard@geo.au.dk>
       Date:   Thu, 13 Nov 2014 09:07:12 +0100
       
       update pressure definition to 1st order central difference
       
       Diffstat:
         M src/darcy.cuh                       |       4 ++--
       
       1 file changed, 2 insertions(+), 2 deletions(-)
       ---
   DIR diff --git a/src/darcy.cuh b/src/darcy.cuh
       t@@ -541,8 +541,8 @@ __global__ void findDarcyPressureForce(
                Float p_zp = dev_darcy_p[d_idx(i_x,i_y,i_z+1)];
        
                // Add Neumann BC at top wall
       -        if (z >= wall0_iz)
       -            p_zp = p;
       +        if (i_z >= wall0_iz)
       +            p_zp = p_zn;
        
                // find particle volume (radius in x.w)
                const Float V = 4.0/3.0*M_PI*x.w*x.w*x.w;