fix eos/cv command


fix ID group-ID eos/cv cv
  • ID, group-ID are documented in fix command
  • eos/cv = style name of this fix command
  • cv = constant-volume heat capacity (energy/temperature units)


fix 1 all eos/cv 0.01


Fix eos/cv applies a mesoparticle equation of state to relate the particle internal energy (u_i) to the particle internal temperature (dpdTheta_i). The eos/cv mesoparticle equation of state requires the constant-volume heat capacity, and is defined as follows:


where Cv is the constant-volume heat capacity, u_cond is the internal conductive energy, and u_mech is the internal mechanical energy. Note that alternative definitions of the mesoparticle equation of state are possible.


This command is part of the USER-DPD package. It is only enabled if LAMMPS was built with that package. See the Making LAMMPS section for more info.

This command also requires use of the atom_style dpd command.