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pair_smd_ulsph.h
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Wed, May 29, 12:11

pair_smd_ulsph.h
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/* -*- c++ -*- ----------------------------------------------------------
*
* *** Smooth Mach Dynamics ***
*
* This file is part of the USER-SMD package for LAMMPS.
* Copyright (2014) Georg C. Ganzenmueller, georg.ganzenmueller@emi.fhg.de
* Fraunhofer Ernst-Mach Institute for High-Speed Dynamics, EMI,
* Eckerstrasse 4, D-79104 Freiburg i.Br, Germany.
*
* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
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.
------------------------------------------------------------------------- */
#ifdef PAIR_CLASS
PairStyle(smd/ulsph,PairULSPH)
#else
#ifndef LMP_ULSPH_H
#define LMP_ULSPH_H
#include "pair.h"
#include <Eigen/Eigen>
namespace LAMMPS_NS {
class PairULSPH: public Pair {
public:
PairULSPH(class LAMMPS *);
virtual ~PairULSPH();
virtual void compute(int, int);
void settings(int, char **);
void coeff(int, char **);
double init_one(int, int);
void init_style();
void init_list(int, class NeighList *);
virtual double memory_usage();
int pack_forward_comm(int, int *, double *, int, int *);
void unpack_forward_comm(int, int, double *);
void AssembleStressTensor();
void *extract(const char *, int &);
void PreCompute();
void PreCompute_DensitySummation();
double effective_shear_modulus(const Eigen::Matrix3d d_dev, const Eigen::Matrix3d deltaStressDev, const double dt, const int itype);
Eigen::Vector3d ComputeHourglassForce(const int i, const int itype, const int j, const int jtype, const Eigen::Vector3d dv,
const Eigen::Vector3d xij, const Eigen::Vector3d g, const double c_ij, const double mu_ij, const double rho_ij);
protected:
double *c0_type; // reference speed of sound defined per particle type
double *rho0; // reference mass density per type
double *Q1; // linear artificial viscosity coeff
int *eos, *viscosity, *strength; // eos and strength material models
double **artificial_pressure; // true/false: use Monaghan's artificial pressure correction?
double **artificial_stress; // artificial stress amplitude
double *onerad_dynamic, *onerad_frozen;
double *maxrad_dynamic, *maxrad_frozen;
void allocate();
int nmax; // max number of atoms on this proc
int *numNeighs;
Eigen::Matrix3d *K;
double *shepardWeight, *c0, *rho;
Eigen::Vector3d *smoothVel;
Eigen::Matrix3d *stressTensor, *L, *F;
double dtCFL;
private:
// enumerate EOSs. MUST BE IN THE RANGE [1000, 2000)
enum {
EOS_LINEAR = 1000, EOS_PERFECT_GAS = 1001, EOS_TAIT = 1002,
};
// enumerate physical viscosity models. MUST BE IN THE RANGE [2000, 3000)
enum {
VISCOSITY_NEWTON = 2000
};
// enumerate strength models. MUST BE IN THE RANGE [3000, 4000)
enum {
STRENGTH_LINEAR = 3000, STRENGTH_LINEAR_PLASTIC = 3001
};
// enumerate some quantitities and associate these with integer values such that they can be used for lookup in an array structure
enum {
NONE = 0,
BULK_MODULUS = 1,
HOURGLASS_CONTROL_AMPLITUDE = 2,
EOS_TAIT_EXPONENT = 3,
REFERENCE_SOUNDSPEED = 4,
REFERENCE_DENSITY = 5,
EOS_PERFECT_GAS_GAMMA = 6,
SHEAR_MODULUS = 7,
YIELD_STRENGTH = 8,
YOUNGS_MODULUS = 9,
POISSON_RATIO = 10,
LAME_LAMBDA = 11,
HEAT_CAPACITY = 12,
M_MODULUS = 13,
HARDENING_PARAMETER = 14,
VISCOSITY_MU = 15,
MAX_KEY_VALUE = 16
};
double **Lookup; // holds per-type material parameters for the quantities defined in enum statement above.
bool velocity_gradient_required;
int updateFlag; // indicates if any relative particle pair movement is significant compared to smoothing length
bool density_summation, density_continuity, velocity_gradient, gradient_correction_flag;
double *effm;
};
}
#endif
#endif

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