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A modified boundary condition of velocity for continuity equation with non-uniform density distribution at outlet boundary plane

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posted on 21.08.2018 by S. Yokoi, Yoshiya Matsushita, Y. Saito, Yohsuke Matsushita, H. Aoki, Weeratunge Malalasekera
Boundary conditions in computational fluid dynamics significantly affect the prediction of flow field. However, the outlet boundary conditions for the continuity equation have been rarely investigated. In addition, the velocities at the outlet boundary might not be accurately predicted with the conventional outlet boundary conditions when a flow that has non-uniform density distribution on the outlet boundary is simulated. In the present study, we modified a boundary condition for the continuity equation in consideration of the non-uniform density distribution on the outlet boundary plane, comparing the numerical results of combustion between the conventional and modified boundary conditions. As a result, the proposed boundary condition can resist the generation of an unrealistic temperature field better than the conventional methods.

Funding

This work was supported by JSPS KAKENHI grant number 15J04680, and part of this work was carried out under the Leading Young Researcher Overseas Visit Program of Tohoku University

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Journal of Chemical Engineering of Japan

Volume

51

Issue

8

Citation

YOKOI, S. ... et al., 2018. A modified boundary condition of velocity for continuity equation with non-uniform density distribution at outlet boundary plane. Journal of Chemical Engineering of Japan, 51(8), pp. 641-645.

Publisher

© The Society of Chemical Engineers, Japan

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

17/08/2018

Publication date

2018-08-20

Notes

This paper was accepted for publication in the journal Journal of Chemical Engineering of Japan and the definitive published version is available at https://doi.org/10.1252/jcej.17we178

ISSN

0021-9592

Language

en

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