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Article
Publication date: 11 October 2018

Salman Arshad, Bo Kong, Alan Kerstein and Michael Oevermann

The purpose of this numerical work is to present and test a new approach for large-scale scalar advection (splicing) in large eddy simulations (LES) that use the linear eddy…

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Abstract

Purpose

The purpose of this numerical work is to present and test a new approach for large-scale scalar advection (splicing) in large eddy simulations (LES) that use the linear eddy sub-grid mixing model (LEM) called the LES-LEM.

Design/methodology/approach

The new splicing strategy is based on an ordered flux of spliced LEM segments. The principle is that low-flux segments have less momentum than high-flux segments and, therefore, are displaced less than high-flux segments. This strategy affects the order of both inflowing and outflowing LEM segments of an LES cell. The new splicing approach is implemented in a pressure-based fluid solver and tested by simulation of passive scalar transport in a co-flowing turbulent rectangular jet, instead of combustion simulation, to perform an isolated investigation of splicing. Comparison of the new splicing with a previous splicing approach is also done.

Findings

The simulation results show that the velocity statistics and passive scalar mixing are correctly predicted using the new splicing approach for the LES-LEM. It is argued that modeling of large-scale advection in the LES-LEM via splicing is reasonable, and the new splicing approach potentially captures the physics better than the old approach. The standard LES sub-grid mixing models do not represent turbulent mixing in a proper way because they do not adequately represent molecular diffusion processes and counter gradient effects. Scalar mixing in turbulent flow consists of two different processes, i.e. turbulent mixing that increases the interface between unmixed species and molecular diffusion. It is crucial to model these two processes individually at their respective time scales. The LEM explicitly includes both of these processes and has been used successfully as a sub-grid scalar mixing model (McMurtry et al., 1992; Sone and Menon, 2003). Here, the turbulent mixing capabilities of the LES-LEM with a modified splicing treatment are examined.

Originality/value

The splicing strategy proposed for the LES-LEM is original and has not been investigated before. Also, it is the first LES-LEM implementation using unstructured grids.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 28 no. 10
Type: Research Article
ISSN: 0961-5539

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Article
Publication date: 22 November 2011

Christopher B. Malone, Udomsak Wongchoti and Alan J. Mitchell

This paper provides empirical support for the introduction of cash flow disclosure regulation issued by Australasian accounting bodies, AASB and NZICA (formerly NZSA), between…

782

Abstract

Purpose

This paper provides empirical support for the introduction of cash flow disclosure regulation issued by Australasian accounting bodies, AASB and NZICA (formerly NZSA), between 1987 and 1992.

Design/methodology/approach

The empirical analysis uses a long window event study format on a panel of 5,368 firm‐year observations between 1996 and 2005.

Findings

The cash flow disclosures required in the regulation are associated with significant abnormal return responses. These effects are robust to the inclusion of other factors linked to abnormal returns such as movements in profitability, size and leverage. We also find support for the proposition that the cash flow effects are conditioned on the quality of the firm, as proxied by q. The market is better and more easily informed with the information required under the revised reporting regime.

Research limitations/implications

The analysis would have been improved with better access to pre‐reform period data.

Originality/value

There is no other study on Australasian markets which looks at the value impacts of cash flow information in relation to this regulatory change. Such a study has also never been done on New Zealand companies.

Details

Pacific Accounting Review, vol. 23 no. 3
Type: Research Article
ISSN: 0114-0582

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Article
Publication date: 1 March 1977

EDITORIAL It's unfortunate that my first words as editor of VINE have to be the bad news that it is no longer to be available free of charge. In the accompanying note I have gone…

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Abstract

EDITORIAL It's unfortunate that my first words as editor of VINE have to be the bad news that it is no longer to be available free of charge. In the accompanying note I have gone into detail about why this is so, and all I want to do here is to say that I hope the £10 a year won't deter too many people from reading VINE.

Details

VINE, vol. 7 no. 3
Type: Research Article
ISSN: 0305-5728

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Book part
Publication date: 8 April 2010

Nickie D. Phillips

Purpose – This chapter explores the commercially successful and critically acclaimed motion picture The Dark Knight as a cultural artifact that both reflects and influences…

Abstract

Purpose – This chapter explores the commercially successful and critically acclaimed motion picture The Dark Knight as a cultural artifact that both reflects and influences popular notions of crime and justice in the aftermath of the September 11, 2001, terrorist attacks.

Design/methodology/approach – From a cultural criminological perspective, this chapter examines ideological messages pertaining to crime and justice presented in the film, including the framing of conflict as one between good and evil, justifications for extralegal violence, and reliance on absolute power as a means of social control. This chapter assesses reactions to the film as a “ritual moral exercise” in which viewers assuage their anxieties and insecurities in a post-9/11 world.

Findings – This chapter investigates representations of justice in the film, including the construction of the villain as “other,” the perception of constitutional procedures as impediments to justice, the embrace of vigilantism, and the willingness to sacrifice transparency of government authorities while accepting widespread surveillance in a time of crisis. Such themes resonated with some viewers who interpreted the film as offering explicit vindication for many of the questionable tactics used in the war on terror.

Originality/value – This chapter argues that popular media, specifically fictional entertainment media, play a role in reflecting and informing collective sentiments of justice. It offers an analysis of The Dark Knight as celebrating individualized, American-style retributive justice in a post-9/11 context.

Details

Popular Culture, Crime and Social Control
Type: Book
ISBN: 978-1-84950-733-2

Available. Content available
Book part
Publication date: 19 February 2024

Quoc Trung Tran

Free Access. Free Access

Abstract

Details

Dividend Policy
Type: Book
ISBN: 978-1-83797-988-2

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