Mesoscale Modelling of the Tolman Length in Multi-component Systems

Lulli，Matteo1; Biferale，Luca2; Falcucci，Giacomo3,4; Sbragaglia，Mauro2; Shan，Xiaowen1

2023

英语

In this paper we analyze the curvature corrections to the surface tension in the context of the Shan-Chen (SC) multi-component Lattice Boltzmann method (LBM). We demonstrate that the same techniques recently applied in the context of the Shan-Chen multi-phase model can be applied to multi-component mixtures. We implement, as a new application, the calculation of the surface of tension radius R through the minimization of the generalized surface tension σ[R]. In turn we are able to estimate the Tolman length, i.e., the first-order coefficient of the curvature expansion of the surface tension σ(R), as well as the higher order corrections, i.e., the curvature- and the Gaussian-rigidity coefficients. The SC multi-component model allows to describe both fully symmetric as well as asymmetric interactions among the components. By performing an extensive set of simulations we present a first example of tunable Tolman length in the mesoscopic model, being zero for symmetric interactions and different from zero otherwise. This result paves the way for controlling such interface properties which are paramount in presence of thermal fluctuations. All reported results can be independently reproduced through the “idea.deploy” framework available at https://github.com/lullimat/idea.deploy.

10.1007/978-981-19-6462-6_14

Springer INdAM Series

51

169-190

2281-518X

第一 ; 通讯

2-s2.0-85158108068

Scopus

2281-5198

1.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,China
2.Department of Physics & INFN,University of Rome “Tor Vergata”,Rome,Italy
3.Department of Enterprise Engineering “Mario Lucertini”,University of Rome “Tor Vergata”,Rome,Italy
4.John A. Paulson School of Engineering and Applied Physics,Harvard University,Cambridge,United States

Lulli，Matteo,Biferale，Luca,Falcucci，Giacomo,et al. Mesoscale Modelling of the Tolman Length in Multi-component Systems. 2023-01-01.