particle.hpp

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/// @file particle.hpp
/// @brief SPH particle data structure
#pragma once
 
namespace physics {
 
/// @brief A single SPH fluid particle (float precision for performance)
struct Particle {
    float x, y;         ///< Position [m]
    float vx, vy;       ///< Velocity [m/s]
    float evx, evy;     ///< Smoothed velocity ev = (ev + v)/2 each step  -- used
                        ///  for viscosity to damp high-frequency oscillations
    float ax, ay;       ///< Acceleration [m/s^2] (updated each step)
    float density;      ///< SPH density rho_i [kg/m^3]
    float pressure;     ///< Pressure p_i [Pa]
    float temperature;  ///< Temperature T_i [ degC]
    float dT_dt;        ///< Temperature rate [ degC/s] (updated each step)
};
 
} // namespace physics