Tag: Material Dynamics and Properties
Thermostat choices affect sampling in molecular dynamics simulations
What the study found Thermostat algorithms in constant-temperature molecular dynamics simulations do not all behave the same way. In this binary Lennard-Jones liquid glass-former model, the Nosé-Hoover chain and Bussi velocity-rescaling thermostats controlled temperature reliably, while the Grønbech-Jensen-Farago Langevin scheme gave the most consistent sampling of both temperature and potential energy. Why the authors say…
Beverloo law mispredicts soft-particle silo flows at different sizes
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in EngineeringWhat the study found The study found that the Beverloo equation does not match all of the simulated flow rates of soft particles through a vertical silo: it underpredicts the flow rate for small outlet sizes and overpredicts it for large outlet sizes. Why the authors say this matters The authors say the divergence from…
Microgravity lowers the jamming point of granular materials
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in EngineeringWhat the study found Granular materials jam at a lower packing density in microgravity than on Earth. The study also found that, in microgravity, cohesive interparticle forces increase the stress needed for granular media to flow. Why the authors say this matters The authors say understanding granular behavior in low gravity is crucial for planetary…
Froude scaling collapses granular impact trajectories across gravity
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in EngineeringWhat the study found The study found that impact behavior into cohesionless granular media can remain qualitatively similar across different gravitational conditions when initial velocities are scaled using the Froude number, a dimensionless quantity that relates speed, gravity, and length scale. Why the authors say this matters The authors suggest this points to an underlying…
