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Multi‐scale computational modelling of flow and heat transfer

Dimitris Drikakis (Fluid Mechanics and Computational Science Group, Department of Aerospace Sciences, Cranfield University, Cranfield, UK)
Nikolaos Asproulis (Fluid Mechanics and Computational Science Group, Department of Aerospace Sciences, Cranfield University, Cranfield, UK)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 15 June 2010

421

Abstract

Purpose

The purpose of this paper is to present different approaches for applying macroscopic boundary conditions in hybrid multiscale modelling.

Design/methodology/approach

Molecular dynamics (MD) was employed for the microscopic simulations. The continuum boundary conditions were applied either through rescaling of atomistic velocities or resampling based on velocity distribution functions.

Findings

The methods have been tested for various fluid flows with heat transfer scenarios. The selection of the most suitable method is not a trivial task and depends on a number of factors such as accuracy requirements and availability of computational resource.

Originality/value

The applicability of the methods has been assessed for liquid and gas flows. Specific parameters that affect their accuracy and efficiency have been identified. The effects of these parameters on the accuracy and efficiency of the simulations are investigated. The study provides knowledge regarding the development and application of boundary conditions in multiscale computational frameworks.

Keywords

Citation

Drikakis, D. and Asproulis, N. (2010), "Multi‐scale computational modelling of flow and heat transfer", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 20 No. 5, pp. 517-528. https://doi.org/10.1108/09615531011048222

Publisher

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Emerald Group Publishing Limited

Copyright © 2010, Emerald Group Publishing Limited

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