topposite sign on viscous term - 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 92a11f510474e7d00cb4437cb5d8d207ab06d974
 (DIR) parent 35b9d27b4dc7e82477a881d891b4eaf9ae572b70
 (HTM) Author: Anders Damsgaard <anders.damsgaard@geo.au.dk>
       Date:   Fri, 20 Jun 2014 09:30:40 +0200
       
       opposite sign on viscous term
       
       Diffstat:
         M src/contactmodels.cuh               |       2 +-
       
       1 file changed, 1 insertion(+), 1 deletion(-)
       ---
 (DIR) diff --git a/src/contactmodels.cuh b/src/contactmodels.cuh
       t@@ -52,7 +52,7 @@ __device__ Float contactLinear_wall(Float3* F, Float3* T, Float* es_dot,
            //Float3 f_n = (-devC_params.k_n * delta - devC_params.gamma_wn * vel_n) * n;
            //Float3 f_n = (-devC_params.k_n * delta + devC_params.gamma_wn * vel_n) * n;
            Float3 f_n = fmax(0.0, -devC_params.k_n*delta
       -                     - devC_params.gamma_wn*vel_n) * n;
       +                     + devC_params.gamma_wn*vel_n) * n;
        
            // Print data for contact model validation
            /*printf("f_n_elast = %f\tgamma_wn = %f\tf_n_visc = %f\n",