tchange pressure force to fit with Navier Stokes implementations - sphere - GPU-based 3D discrete element method algorithm with optional fluid coupling
 (HTM) git clone git://src.adamsgaard.dk/sphere
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       ---
 (DIR) commit b23d3140ae0d08d7bb643b24fab9c4ac7f63bb86
 (DIR) parent f3f948c938ab96276133a7ef985abf23a03e1d0e
 (HTM) Author: Anders Damsgaard <anders.damsgaard@geo.au.dk>
       Date:   Wed, 19 Nov 2014 13:54:54 +0100
       
       change pressure force to fit with Navier Stokes implementations
       
       Diffstat:
         M src/darcy.cuh                       |       4 +++-
       
       1 file changed, 3 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/src/darcy.cuh b/src/darcy.cuh
       t@@ -558,7 +558,9 @@ __global__ void findDarcyPressureForce(
                // find pressure gradient force plus buoyancy force.
                // buoyancy force = weight of displaced fluid
                // f_b = -rho_f*V*g
       -        Float3 f_p = -1.0*grad_p*V/(1.0 - phi);
       +        // Float3 f_p = -1.0*grad_p*V/(1.0 - phi);
       +        // Float3 f_p = -1.0*grad_p*V/(1.0 - phi)
       +        Float3 f_p = -1.0*grad_p*V
                    - rho_f*V*MAKE_FLOAT3(
                            devC_params.g[0],
                            devC_params.g[1],