Characteristics of unsteadiness for transitional plane fountains in linearly stratified fluids

Inam, Mohammad Ilias, Lin, Wenxian, Williamson, N., Armfield, S.W., and He, Yinghe (2019) Characteristics of unsteadiness for transitional plane fountains in linearly stratified fluids. International Communications in Heat and Mass Transfer, 100. pp. 83-97.

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Abstract

When a fountain is injected into a linearly stratified fluid, its behavior will be governed by the stratification of the ambient fluid, represented by the dimensionless temperature stratification parameter (s), in addition to the Reynolds number (Re) and the Froude number (Fr). In this study, a series of three-dimensional direct numerical simulations (DNS) were carried out using ANSYS Fluent for transitional plane fountains in linearly-stratified fluids with Re, Fr and s over the ranges 28 ≤ Re ≤ 300, 3 ≤ Fr ≤ 10, and 0.1 ≤ s ≤ 0.5 to study the effects of these governing parameters on the characteristics of such unsteadiness. Empirical correlations to quantify the effects of Fr, Re and s over the studied ranges on the characteristics of the unsteadiness are also obtained and compared to the relevant scaling relations developed for weak plane fountains.

Item ID: 57238
Item Type: Article (Research - C1)
ISSN: 1879-0178
Keywords: direct numerical simulation; plane fountain; stratification; transitional flow; unsteadiness
Copyright Information: © 2018 Elsevier Ltd. All rights reserved.
Funders: National Natural Science Foundation of China (NNSFC), Australian Research Council (ARC), James Cook University (JCU)
Projects and Grants: NNSFC 51469035, ARC DP160102134
Date Deposited: 27 Feb 2019 07:35
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 60%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091501 Computational Fluid Dynamics @ 20%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091508 Turbulent Flows @ 20%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 80%
97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 20%
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