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fix_nh_cuda.h
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Sun, May 26, 05:28

fix_nh_cuda.h
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/* -*- c++ -*- ----------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
#ifndef LMP_FIX_NH_CUDA_H
#define LMP_FIX_NH_CUDA_H
#include "fix.h"
#include "cuda_precision.h"
namespace LAMMPS_NS {
class FixNHCuda : public Fix {
public:
FixNHCuda(class LAMMPS *, int, char **);
virtual ~FixNHCuda();
int setmask();
virtual void init();
void setup(int);
virtual void initial_integrate(int);
virtual void final_integrate();
void initial_integrate_respa(int, int, int);
void final_integrate_respa(int, int);
double compute_scalar();
double compute_vector(int);
void write_restart(FILE *);
void restart(char *);
int modify_param(int, char **);
void reset_dt();
protected:
class Cuda *cuda;
int dimension,which;
double dtv,dtf,dthalf,dt4,dt8,dto;
double boltz,nktv2p,tdof;
double vol0,t0;
double t_start,t_stop;
double t_current,t_target;
double t_freq;
int tstat_flag; // 1 if control T
int pstat_flag; // 1 if control P
int pstyle,pcouple,allremap;
int p_flag[6]; // 1 if control P on this dim, 0 if not
double p_start[6],p_stop[6];
double p_freq[6],p_target[6];
double omega[6],omega_dot[6];
double omega_mass[6];
double p_current[6],dilation[6];
double drag,tdrag_factor; // drag factor on particle thermostat
double pdrag_factor; // drag factor on barostat
double factor[6]; // velocity scaling due to barostat
int kspace_flag; // 1 if KSpace invoked, 0 if not
int nrigid; // number of rigid fixes
int *rfix; // indices of rigid fixes
int nlevels_respa;
double *step_respa;
char *id_temp,*id_press;
class Compute *temperature,*pressure;
int tflag,pflag;
double *eta,*eta_dot; // chain thermostat for particles
double *eta_dotdot;
double *eta_mass;
int mtchain; // length of chain
double *etap; // chain thermostat for barostat
double *etap_dot;
double *etap_dotdot;
double *etap_mass;
int mpchain; // length of chain
int mtk_flag; // 0 if using Hoover barostat
double mtk_term1,mtk_term2;
int mtchain_default_flag;
int pdim; // number of barostatted dims
double mvv_current[3]; // diagonal of KE tensor
double mtk_factor; // MTK factor
double p_freq_max; // maximum barostat frequency
double p_hydro; // hydrostatic target pressure
int nc_tchain,nc_pchain;
double factor_eta;
double sigma[6]; // scaled target stress
double fdev[6]; // deviatoric force on barostat
int deviatoric_flag; // 0 if target stress tensor is hydrostatic
double h0_inv[6]; // h_inv of reference (zero strain) box
int nreset_h0; // interval for resetting h0
void couple();
void couple_ke();
void remap();
void nhc_temp_integrate();
void nhc_press_integrate();
virtual void nve_x(); // may be overwritten by child classes
virtual void nve_v();
virtual void nh_v_press();
virtual void nh_v_temp();
void compute_sigma();
void compute_deviatoric();
double compute_strain_energy();
void compute_press_target();
void nh_omega_dot();
X_CFLOAT triggerneighsq;
};
}
#endif

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