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10.1016@j.compfluid.2017.03.027.pdf (3.14 MB)

A parallel volume of fluid-Lagrangian Parcel Tracking coupling procedure for diesel spray modelling

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posted on 2023-05-19, 03:30 authored by Hongjiang Yu, Goldsworthy, L, Matt Ghiji, Paul BrandnerPaul Brandner, Vikrambhai GaraniyaVikrambhai Garaniya
A parallel computing Eulerian/Lagrangian multi-scale coupling procedure for diesel spray simulation is presented. Early breakup of the diesel jet is captured by using a compressible Volume of Fluid (VOF) method. In regions where the phase interface can no longer be sufficiently resolved, separated and small scale liquid structures are described by a Lagrangian Parcel Tracking (LPT) approach, in conjunction with secondary breakup modelling and a turbulence stochastic dispersion model. The coupling of these two descriptions utilises a Region Coupling Method and an efficiently parallelised droplet identification and extraction procedure. This approach enables run-time VOF-LPT field coupling and filters small-scale liquid structures that are suitable candidates for Eulerian-liquid-structure/Lagrangian droplet conversion, preserving their position, mass and momentum. The coupling procedure is initially applied to model the atomisation of a simple liquid jet and the results are compared with that of a statistical coupling approach to demonstrate the performance of the developed coupling procedure. Its application is then extended to simulate a real diesel spray from a nozzle with a sharp entrance. Coupling in-nozzle phenomena such as flow separation, flow detachment and turbulence to the primary and secondary spray atomisation, provides a tool for the prediction of complex spray dynamics.

History

Publication title

Computers and Fluids

Volume

150

Pagination

46-65

ISSN

0045-7930

Department/School

Australian Maritime College

Publisher

Pergamon Press

Place of publication

United Kingdom

Rights statement

Copyright 2017 Elsevier Ltd.

Repository Status

  • Restricted

Socio-economic Objectives

Environmentally sustainable transport activities not elsewhere classified

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