Refined energy-conserving dissipative particle dynamics model with temperature-dependent properties and its application in solidification problem
Journal
Physical Review E
Journal Volume
96
Journal Issue
4
Date Issued
2017
Author(s)
Abstract
It has been observed previously that the physical behaviors of Schmidt number (Sc) and Prandtl number (Pr) of an energy-conserving dissipative particle dynamics (eDPD) fluid can be reproduced by the temperature-dependent weight function appearing in the dissipative force term. In this paper, we proposed a simple and systematic method to develop the temperature-dependent weight function in order to better reproduce the physical fluid properties. The method was then used to study a variety of phase-change problems involving solidification. The concept of the "mushy" eDPD particle was introduced in order to better capture the temperature profile in the vicinity of the solid-liquid interface, particularly for the case involving high thermal conductivity ratio. Meanwhile, a way to implement the constant temperature boundary condition at the wall was presented. The numerical solutions of one- and two-dimensional solidification problems were then compared with the analytical solutions and/or experimental results and the agreements were promising. © 2017 American Physical Society.
SDGs
Other Subjects
Energy conservation; Phase interfaces; Prandtl number; Solidification; Constant temperature; Dissipative particle dynamics; Dissipative particle dynamics model; High thermal conductivity; Solid-liquid interfaces; Temperature dependent; Temperature-dependent properties; Two-dimensional solidification; Thermal conductivity; article; thermal conductivity
Type
journal article