Ali H. Abdulkarim, Ali Ates, Kemal Altinisik and Eyüb Canli
This study aims to introduce a metal porous burner design. Literature is surveyed in a comprehensive manner to relate the current design with ongoing research. A demonstrative…
Abstract
Purpose
This study aims to introduce a metal porous burner design. Literature is surveyed in a comprehensive manner to relate the current design with ongoing research. A demonstrative computational fluid dynamics (CFD) analysis is presented with projected flow conditions by means of a common commercial CFD code and turbulence model to show the flow-related features of the proposed burner. The porous metal burner has a novel design, and it is not commercially available.
Design/methodology/approach
Based on the field experience about porous burners, a metal, cylindrical, two-staged, homogenous porous burner was designed. Literature was surveyed to lay out research aspects for the porous burners and porous media. Three dimensional solid computer model of the burner was created. The flow domain was extracted from the solid model to use in CFD analysis. A commercial computational fluid dynamics code was utilized to analyze the flow domain. Projected flow conditions for the burner were applied to the CFD code. Results were evaluated in terms of homogenous flow distribution at the outer surface and flow mixing. Quantitative results are gathered and are presented in the present report by means of contour maps.
Findings
There aren’t any flow sourced anomalies in the flow domain which would cause an inefficient combustion for the application. An accumulation of gas is evident around the top flange of the burner leading to higher static pressure. Generally, very low pressure drop throughout the proposed burner geometry is found which is regarded as an advantage for burners. About 0.63 Pa static pressure increase is realized on the flange surface due to the accumulation of the gas. The passage between inner and outer volumes has a high impact on the total pressure and leads to about 0.5 Pa pressure drop. About 0.03 J/kg turbulent kinetic energy can be viewed as the highest amount. Together with the increase in total enthalpy, total amount of energy drawn from the flow is 0.05 J/kg. More than half of it spent through turbulence and remaining is dissipated as heat. Outflow from burner surface can be regarded homogenous though the top part has slightly higher outflow. This can be changed by gradually increasing pore sizes toward inlet direction.
Research limitations/implications
Combustion via a porous medium is a complex phenomenon since it involves multiple phases, combustion chemistry, complex pore geometries and fast transient responses. Therefore, experimentation is used mostly. To do a precise computational analysis, strong computational power, parallelizing, elaborate solid modeling, very fine meshes and small time steps and multiple models are required.
Practical implications
Findings in the present work imply that a homogenous gas outflow can be attained through the burner surfaces while very small pressure drop occurs leading to less pumping power requirement which is regarded as an advantage. Flow mixing is realizable since turbulent kinetic energy is distinguished at the interface surface between inner and outer volumes. The porous metal matrix burner offers fluid mixing and therefore better combustion efficiency. The proposed dimensions are found appropriate for real-world application.
Originality/value
Conducted analysis is for a novel burner design. There are opportunities both for scientific and commercial fields.
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Outlines the development of globalization and related research; and takes the Middle East as a basis for examining regionalization in more depth. Discusses the definition of…
Abstract
Outlines the development of globalization and related research; and takes the Middle East as a basis for examining regionalization in more depth. Discusses the definition of boundaries in economic, geographic and political terms; the impact of various types of regional trade associations and trade and investment; and five factors affecting regionalization in the Middle East; peace, political will, economic compatibility, socio‐cultural similarity and geographical proximity. Considers the implications for the corporate strategy of multinationals, e.g. market segmentation, integration, strategic sourcing etc.
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Dorothy A. Yen, Benedetta Cappellini and Terry Dovey
This paper seeks to understand children’s responses to food waste in school by exploring children’s views on food waste and empowering them to discuss and develop their own…
Abstract
Purpose
This paper seeks to understand children’s responses to food waste in school by exploring children’s views on food waste and empowering them to discuss and develop their own solutions.
Design/methodology/approach
Using creative problem-solving approach and photovoice technique, the authors conducted focus group discussions with 28 primary school children in the UK.
Findings
Children have a clear understanding of the consequences of food waste for individuals, society and the environment. They displayed negative emotions concerning food waste and responded positively to the possibility of food recycling. Their solutions to reduce food waste will require multiple stakeholder engagement, including self-regulation, peer-monitoring, teacher supervision and family support. However, rather than relying on intervention schemes that require significant adult involvement, children placed a heavy emphasis on self-regulation, playing an active role in addressing food waste in school.
Originality/value
This research extends previous understanding, by showing children as agentic consumers who can shape food waste solutions in school. These findings are of use to primary teachers and local education authorities, to aid children in developing their own solutions to reduce food waste in their own schools.
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Yaw A. Debrah and Ian G. Smith
Presents over sixty abstracts summarising the 1999 Employment Research Unit annual conference held at the University of Cardiff. Explores the multiple impacts of globalization on…
Abstract
Presents over sixty abstracts summarising the 1999 Employment Research Unit annual conference held at the University of Cardiff. Explores the multiple impacts of globalization on work and employment in contemporary organizations. Covers the human resource management implications of organizational responses to globalization. Examines the theoretical, methodological, empirical and comparative issues pertaining to competitiveness and the management of human resources, the impact of organisational strategies and international production on the workplace, the organization of labour markets, human resource development, cultural change in organisations, trade union responses, and trans‐national corporations. Cites many case studies showing how globalization has brought a lot of opportunities together with much change both to the employee and the employer. Considers the threats to existing cultures, structures and systems.
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The purpose of this paper was to demonstrate the influence of a 3-aminopropyl-triethoxysilane–polyacrylic acid (amino propyl silane (APS)-PAA) buffer layer on the tribological…
Abstract
Purpose
The purpose of this paper was to demonstrate the influence of a 3-aminopropyl-triethoxysilane–polyacrylic acid (amino propyl silane (APS)-PAA) buffer layer on the tribological performance of copper sulfide (CuS) thin film on silicon (Si) substrate.
Design/methodology/approach
The APS-PAA buffer layer was first deposited on Si substrate by a self-assembling method. Then, the deposited film was coated by a CuS film by a successive ionic layer absorption and reaction (SILAR) method. The structures and morphologies of the prepared films were characterized by X-ray diffraction and atomic force microscopy. The results showed that the prepared CuS film with a PAA-APS double layer had a good crystallinity and surface morphology. The tribological performance of the prepared film was analyzed on UMT-2 tribometer and scanning electric microscope.
Findings
With use of an APS-PAA buffer layer, the CuS thin films became compact, smooth and uniform. The tribological performance of the CuS film was greatly enhanced by using an APS-PAA buffer layer.
Originality/value
The paper is the first to demonstrate that the CuS film exhibited enhanced structure, morphology and tribological characteristics by using an APS-PAA buffer layer.
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Presents a special issue, enlisting the help of the author’s students and colleagues, focusing on age, sex, colour and disability discrimination in America. Breaks the evidence…
Abstract
Presents a special issue, enlisting the help of the author’s students and colleagues, focusing on age, sex, colour and disability discrimination in America. Breaks the evidence down into manageable chunks, covering: age discrimination in the workplace; discrimination against African‐Americans; sex discrimination in the workplace; same sex sexual harassment; how to investigate and prove disability discrimination; sexual harassment in the military; when the main US job‐discrimination law applies to small companies; how to investigate and prove racial discrimination; developments concerning race discrimination in the workplace; developments concerning the Equal Pay Act; developments concerning discrimination against workers with HIV or AIDS; developments concerning discrimination based on refusal of family care leave; developments concerning discrimination against gay or lesbian employees; developments concerning discrimination based on colour; how to investigate and prove discrimination concerning based on colour; developments concerning the Equal Pay Act; using statistics in employment discrimination cases; race discrimination in the workplace; developments concerning gender discrimination in the workplace; discrimination in Japanese organizations in America; discrimination in the entertainment industry; discrimination in the utility industry; understanding and effectively managing national origin discrimination; how to investigate and prove hiring discrimination based on colour; and, finally, how to investigate sexual harassment in the workplace.
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Globalisation is generally defined as the “denationalisation of clusters of political, economic, and social activities” that destabilize the ability of the sovereign State to…
Abstract
Globalisation is generally defined as the “denationalisation of clusters of political, economic, and social activities” that destabilize the ability of the sovereign State to control activities on its territory, due to the rising need to find solutions for universal problems, like the pollution of the environment, on an international level. Globalisation is a complex, forceful legal and social process that take place within an integrated whole with out regard to geographical boundaries. Globalisation thus differs from international activities, which arise between and among States, and it differs from multinational activities that occur in more than one nation‐State. This does not mean that countries are not involved in the sociolegal dynamics that those transboundary process trigger. In a sense, the movements triggered by global processes promote greater economic interdependence among countries. Globalisation can be traced back to the depression preceding World War II and globalisation at that time included spreading of the capitalist economic system as a means of getting access to extended markets. The first step was to create sufficient export surplus to maintain full employment in the capitalist world and secondly establishing a globalized economy where the planet would be united in peace and wealth. The idea of interdependence among quite separate and distinct countries is a very important part of talks on globalisation and a significant side of today’s global political economy.
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Steven H. Appelbaum, Maria Serena and Barbara T. Shapiro
A case study was conducted to identify and to dispel the current stereotypes in the workplace regarding Generation X and Baby Boomers. For the purpose of the study Generation X…
Abstract
A case study was conducted to identify and to dispel the current stereotypes in the workplace regarding Generation X and Baby Boomers. For the purpose of the study Generation X consisted of those born between 1961 and 1981, while Baby Boomers consisted of those born between 1943 and 1960. The purpose of this article was to use a custom designed survey based on the literature as the foundation to test congruence or lack of it, to address six commonly held myths presented by Paul and Townsend (1993). Furthermore it was intended to test empirical research gathered by a literature review of the stereotypes in the workplace, to better understand the profiles and factors that motivate the Baby Boomers and Generation X, in conjunction with the following independent variables: age, productivity, motivation, training, mentoring and job satisfaction. The hypothesis tested suggested that Generation Xers are more productive, more motivated, and easily trainable and exhibit higher job satisfaction levels as compared to Baby Boomers. It is important for or ganizations to recognize the limitations that stereotypes create in the workplace. As was demonstrated by the survey, Baby Boomers and Generation Xers are not dissimilar as employees; they possess more similarities than differences. Organizations need to foster an environment of respect/equity for both groups to create synergies between them to build and maintain a productive workforce.
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Outlines the ideas incorporated in “development economics” and criticizes the lack of distinction made by some writers between development and economic growth. Asks whether…
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Outlines the ideas incorporated in “development economics” and criticizes the lack of distinction made by some writers between development and economic growth. Asks whether underdeveloped countries really need a different economic theory from Western Europe and suggests that growth (in gross national product) and development (i.e. structural change) are actually complementary processes. Reviews various theories on the causes of underdevelopment (e.g. market failure, government failure) and strategies to cure it (e.g. government intervention, private initiative, market mechanism); and cites some examples of successful positive intervention.
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Examines key general marketing texts to produce a consistent set of claims termed the nine tenets of marketing. States that these are core to conventional marketing teaching and…
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Examines key general marketing texts to produce a consistent set of claims termed the nine tenets of marketing. States that these are core to conventional marketing teaching and thought. Argues that they have little epistomological basis. Shows that marketing professionals do not enjoy the same status as those in law and accountancy, concluding that to convince others of the profession’s worth, the whole basis may need renovation.