![]() Oscillations have physical significance in some cases. With an appropriate choice of mass-like parameter q. Under some special high-symmetry conditions, the pressure (volume)Īnd/or temperature of the system may oscillate for many cycles even The smallest value of tscale that results in compression. Volume compressionĪt the start can be sped up by using a non-zero value of tscale. Sound speed or p0 has been chosen inaccurately. If the volume is notĬompressing, either the shock speed is chosen to be below the material To perform a simulation, choose a value of q that provides volumeĬompression on the timescale of 100 fs to 1 ps. shockvel determines the steady shock velocity that will be The macroscopic conservation laws dictated by a shockįront. Volume and temperature in such a way as to restrain the system to the See (Reed)įor a detailed description of this method. Integration to update positions and velocities each timestep to mimicĪ compressive shock wave passing over the system. This command performs the Multi-Scale Shock Technique (MSST) V0 value = initial simulation cell volume in the shock equations (distance^3 units)Į0 value = initial total energy (energy units) P0 value = initial pressure in the shock equations (pressure units) Mu value = artificial viscosity (mass/length/time units) keyword = q or mu or p0 or v0 or e0 or tscale q value = cell mass-like parameter (mass^2/distance^4 units).zero or more keyword value pairs may be appended.shockvel = shock velocity (strictly positive, distance/time units). ![]() ID, group-ID are documented in fix command.Syntax: fix ID group-ID msst dir shockvel keyword value. LAMMPS WWW Site - LAMMPS Documentation - LAMMPS Commands
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