Work

Consistent Hydrodynamics for Phase Field Crystals

Year: 2016

Type: article

Abstract: We use the amplitude expansion in the phase field crystal framework to formulate an approach where the fields describing the microscopic structure of the material are coupled to a hydrodynamic velocity field. The model is shown to reduce to the well-known macroscopic theories in appropriate limits, including compressible Navier-Stokes and wave equations. Moreover, we show that the dynamics proposed allows for long wavelength phonon modes and demonstrate the theory numerically showing that the elastic excitations in the system are relaxed through phonon emission.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.116.024303

Authors: V. Heinonen, C. V. Achim, J. M. Kosterlitz, See-Chen Ying, J. Lowengrub, T. Ala-Nissila

Institutions: Aalto University, Brown University, University of California, Irvine

Language: English

Topic: Solidification and crystal growth phenomena

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze