fix_viscous_cuda_kernel.cu
bac07b76cef2lammm-master

fix_viscous_cuda_kernel.cu
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			/* ----------------------------------------------------------------------
			LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator

			Original Version:
			http://lammps.sandia.gov, Sandia National Laboratories
			Steve Plimpton, sjplimp@sandia.gov

			See the README file in the top-level LAMMPS directory.

			-----------------------------------------------------------------------

			USER-CUDA Package and associated modifications:
			https://sourceforge.net/projects/lammpscuda/

			Christian Trott, christian.trott@tu-ilmenau.de
			Lars Winterfeld, lars.winterfeld@tu-ilmenau.de
			Theoretical Physics II, University of Technology Ilmenau, Germany

			See the README file in the USER-CUDA directory.

			This software is distributed under the GNU General Public License.
			------------------------------------------------------------------------- */

			__global__ void Cuda_FixViscousCuda_PostForce_Kernel(int groupbit,F_FLOAT* gamma)
			{
			int i=(blockIdx.xgridDim.y+blockIdx.y)blockDim.x+threadIdx.x;

			if(i < _nlocal)
			if (_mask[i] & groupbit) {
			F_FLOAT drag = gamma[_type[i]];
			_f[i] -= drag*_v[i];
			_f[i+1_nmax] -= drag_v[i+1*_nmax];
			_f[i+2_nmax] -= drag_v[i+2*_nmax];
			}
			}