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Article
Publication date: 3 May 2016

Kai Wang, Shiting Wen, Rizwan Zahoor, Ming Li and Božidar Šarler

The purpose of this paper is to find solution of Stokes flow problems with Dirichlet and Neumann boundary conditions in axisymmetry using an efficient non-singular method of…

Abstract

Purpose

The purpose of this paper is to find solution of Stokes flow problems with Dirichlet and Neumann boundary conditions in axisymmetry using an efficient non-singular method of fundamental solutions that does not require an artificial boundary, i.e. source points of the fundamental solution coincide with the collocation points on the boundary. The fundamental solution of the Stokes pressure and velocity represents analytical solution of the flow due to a singular Dirac delta source in infinite space.

Design/methodology/approach

Instead of the singular source, a non-singular source with a regularization parameter is employed. Regularized axisymmetric sources were derived from the regularized three-dimensional sources by integrating over the symmetry coordinate. The analytical expressions for related Stokes flow pressure and velocity around such regularized axisymmetric sources have been derived. The solution to the problem is sought as a linear combination of the fields due to the regularized sources that coincide with the boundary. The intensities of the sources are chosen in such a way that the solution complies with the boundary conditions.

Findings

An axisymmetric driven cavity numerical example and the flow in a hollow tube and flow between two concentric tubes are chosen to assess the performance of the method. The results of the newly developed method of regularized sources in axisymmetry are compared with the results obtained by the fine-grid second-order classical finite difference method and analytical solution. The results converge with a finer discretization, however, as expected, they depend on the value of the regularization parameter. The method gives accurate results if the value of this parameter scales with the typical nodal distance on the boundary.

Originality/value

Analytical expressions for the axisymmetric blobs are derived. The method of regularized sources is for the first time applied to axisymmetric Stokes flow problems.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 26 no. 3/4
Type: Research Article
ISSN: 0961-5539

Keywords

Open Access
Article
Publication date: 8 June 2023

Tadej Dobravec, Boštjan Mavrič, Rizwan Zahoor and Božidar Šarler

This study aims to simulate the dendritic growth in Stokes flow by iteratively coupling a domain and boundary type meshless method.

Abstract

Purpose

This study aims to simulate the dendritic growth in Stokes flow by iteratively coupling a domain and boundary type meshless method.

Design/methodology/approach

A preconditioned phase-field model for dendritic solidification of a pure supercooled melt is solved by the strong-form space-time adaptive approach based on dynamic quadtree domain decomposition. The domain-type space discretisation relies on monomial augmented polyharmonic splines interpolation. The forward Euler scheme is used for time evolution. The boundary-type meshless method solves the Stokes flow around the dendrite based on the collocation of the moving and fixed flow boundaries with the regularised Stokes flow fundamental solution. Both approaches are iteratively coupled at the moving solid–liquid interface. The solution procedure ensures computationally efficient and accurate calculations. The novel approach is numerically implemented for a 2D case.

Findings

The solution procedure reflects the advantages of both meshless methods. Domain one is not sensitive to the dendrite orientation and boundary one reduces the dimensionality of the flow field solution. The procedure results agree well with the reference results obtained by the classical numerical methods. Directions for selecting the appropriate free parameters which yield the highest accuracy and computational efficiency are presented.

Originality/value

A combination of boundary- and domain-type meshless methods is used to simulate dendritic solidification with the influence of fluid flow efficiently.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 33 no. 8
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 14 September 2010

Lorraine A. Friend, Carolyn L. Costley and Charis Brown

The purpose of this paper is to examine “nasty” retail shopping experiences. The paper aims to consider implications of distrust related to theft control measures in retail…

2766

Abstract

Purpose

The purpose of this paper is to examine “nasty” retail shopping experiences. The paper aims to consider implications of distrust related to theft control measures in retail customer service.

Design/methodology/approach

Storytelling as a “memory‐work” method draws on phenomenology, hermeneutics, and the narrative. Researchers and participants worked together as co‐researchers to analyze and interpret “lived” experiences contained in their written personal stories. The authors extend this understanding in the context of existing literature.

Findings

Distrust pervaded the stories, which focused on shoplifting accusations (real and imagined). As a violation of implicit trust, distrust provoked intense moral emotions, damaged identities, and fuelled retaliation. Findings illustrate a pervasive downward “spiral of distrust” in the retail context.

Practical implications

Results suggest that retailers use store personnel rather than technological surveillance to control theft. Interacting with customers and displaying cooperation builds respect, trust, and relationships and may deter theft. Retailers should add signs of trust and remove signs of distrust from retail environments. They cannot rely on service recovery to appease customers disgruntled by distrust.

Social implications

When retailers act as if they care, customers reciprocate, creating upward trust spirals and stronger communities.

Originality/value

A dark side to retail loss‐prevention tactics is demonstrated in the paper. Surveillance signals distrust, which repels customers and resists service recovery. Concepts of spirals of distrust and trust to the services marketing literature are introduced. The spirals illustrate how distrust destroys and trust builds relationships and communities. Furthermore, ideas are offered about ways to start upward trust spirals.

Details

Journal of Services Marketing, vol. 24 no. 6
Type: Research Article
ISSN: 0887-6045

Keywords

Article
Publication date: 24 May 2011

Alexander Styhre

Any reasonably advanced practice is a blend of rational thinking, thinking structured by concepts and numerical representations rendering the world static and immovable, and…

1095

Abstract

Purpose

Any reasonably advanced practice is a blend of rational thinking, thinking structured by concepts and numerical representations rendering the world static and immovable, and intuitive thinking, a mode of knowing operating “in‐between” concepts and representations and, therefore, are apprehending the fluid and fleeting nature of being. When moving from being a novice to an expert practitioner, the actor must both appropriate rational thinking and increasingly, as experience is acquired, draw on intuitive thinking. For the novice, the concern is however that intuitive thinking is complicated to articulate or represent but is primarily acquired through years of experience and practice. The paper seeks to discuss practice as a term that includes both these two elements of thinking.

Design/methodology/approach

The paper uses empirical examples from nursing work, financial trading, and scientific research to further develop the concept of practice.

Findings

The paper suggests that “skilled coping” of expert practitioners are examined as a gradual appropriation and combining of rational and intuitive thinking. The difficulty of becoming a skilled practitioner is, inter alia, to acquire inarticulate know‐how through collaboration with experienced peers.

Originality/value

The paper seeks to discuss the concept of practice based on process philosophy underlining the distinction between rational and intuitive thinking, yet emphasizing their mutual constitution in the domain of practice. The concept of practice is thus anchored in a solid theoretical framework capable of exploring some of the difficulties involved in acquiring expert skills.

Details

International Journal of Organizational Analysis, vol. 19 no. 2
Type: Research Article
ISSN: 1934-8835

Keywords

Article
Publication date: 1 October 1987

Tibor R. Machan

In [ancient moral] philosophy the duties of human life were treated of as subservient to the happiness and perfection of human life. … In the ancient philosophy the perfection of…

Abstract

In [ancient moral] philosophy the duties of human life were treated of as subservient to the happiness and perfection of human life. … In the ancient philosophy the perfection of virtue was represented as necessarily productive to the person who possessed it, of the most perfect happiness in this life. In the modern philosophy it was frequently represented as almost always inconsistent with any degree of happiness in this life, and heaven was to be earned by penance and mortification…not by the liberal, generous, and spirited conduct of a man. …By far the most important of all the different branches of philosophy became in this manner by far the most corrupted. (Adam Smith, The Wealth of Nations)

Details

International Journal of Social Economics, vol. 14 no. 10
Type: Research Article
ISSN: 0306-8293

Book part
Publication date: 13 November 2023

David Aveline

In this chapter, I take a symbolic interactionist look at the anthropomorphic projections of 38 people in four large Canadian cities who report having encountered ghosts. As part…

Abstract

In this chapter, I take a symbolic interactionist look at the anthropomorphic projections of 38 people in four large Canadian cities who report having encountered ghosts. As part of a larger project on perceived encounters with ghosts, I interviewed these people using audiotape, transcribed the interviews, and identified themes within them. Together, they mentioned 195 ghosts and described their appearances and actions. I identified anthropomorphic projections in four areas: (1) Physicality – pertaining to the bodies of the ghosts, (2) Relational – pertaining to kinship ties, e.g., mothers, fathers, grandmothers, (3) Rational – the ghosts' motivations and justifications, and (4) Affective – pertaining to the ghosts' emotions. These anthropomorphic projections were the respondents' efforts at sense making after having encountered what they believed to be phantasmal.

Details

Festschrift in Honor of David R. Maines
Type: Book
ISBN: 978-1-83753-486-9

Keywords

Article
Publication date: 1 November 1988

Tibor R. Machan

Here Marx's philosophy is dissected from the angle of bourgeois capitalism which he, Marx, sought to overcome. His social, political and economic ideas are criticised. Although it…

1444

Abstract

Here Marx's philosophy is dissected from the angle of bourgeois capitalism which he, Marx, sought to overcome. His social, political and economic ideas are criticised. Although it is noted that Marx wanted to ameliorate human suffering, the result turned out to be Utopian, contrary to his own intentions. Contrary to Marx, it is individualism that makes the best sense and capitalism that holds out the best hope for coping with most of the problems he sought to solve. Marx's philosophy is alluring but flawed at a very basic level, namely, where it denies the individuality of each person and treats humanity as “an organic body”. Capitalism, while by no means out to guarantee a perfect society, is the best setting for the realisation of the diverse but often equally noble human goals of its membership.

Details

International Journal of Social Economics, vol. 15 no. 11/12
Type: Research Article
ISSN: 0306-8293

Keywords

Article
Publication date: 1 May 1979

Lionel A. Mitchell

Editors' Note In this short article the authors briefly review and comment on the most commonapproaches used by companies or proposed by specialists for setting the budgets to…

Abstract

Editors' Note In this short article the authors briefly review and comment on the most common approaches used by companies or proposed by specialists for setting the budgets to be spent on advertising in an organisation.

Details

Management Decision, vol. 17 no. 5
Type: Research Article
ISSN: 0025-1747

Book part
Publication date: 1 January 2004

William Barnett and Walter Block

In “Why the Austrians Are Wrong About Depressions,” Professor Tullock (1987, p. 73) makes some statements that are incorrect and others which, properly interpreted, refute or at…

Abstract

In “Why the Austrians Are Wrong About Depressions,” Professor Tullock (1987, p. 73) makes some statements that are incorrect and others which, properly interpreted, refute or at least, fail egregiously to support, his thesis that the Austrian theory of the trade cycle is incorrect. We begin by considering one of Tullock's minor points in Section 2 and then consider his major point in Section 3. In Section 4 we take to task Tullock (1989), also on this same topic, and conclude in Section 5.

Details

The Dynamics of Intervention: Regulation and Redistribution in the Mixed Economy
Type: Book
ISBN: 978-0-76231-053-1

Book part
Publication date: 4 December 2018

Veronica Di Caprio, Peter Wiltshier and Valentina Della Corte

Many travellers are increasingly visiting destinations’ natural environments as they seek extraordinary experiences that are different from their usual lifestyles. Very often…

Abstract

Many travellers are increasingly visiting destinations’ natural environments as they seek extraordinary experiences that are different from their usual lifestyles. Very often, they demand agritourism experiences in rural settings. This development has inevitably led many businesses to provide agritourism services to meet these tourists’ needs. In this light, this chapter explores the agritourism sector in Italy. The aim of this chapter is to analyse the agritourism supply in Campania. It analyses the main success factors which can affect the development of agritourism industry in the region. This contribution study is divided into three parts. The first part presents a brief introduction as well as a definition for agritourism. The second part provides an overview of this industry sector in Italy, as the researchers analyse official statistical data on this topic. In conclusion, the authors imply that there are opportunities for the growth of rural tourism in Campania.

Details

The Branding of Tourist Destinations: Theoretical and Empirical Insights
Type: Book
ISBN: 978-1-78769-373-9

Keywords

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