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1 – 10 of 640
Article
Publication date: 15 January 2024

F.D. Ayegbusi and A.S. Idowu

The purpose of this study is to investigate the effects of entropy generation of some embedded thermophysical properties on heat and mass transfer of pulsatile flow of…

Abstract

Purpose

The purpose of this study is to investigate the effects of entropy generation of some embedded thermophysical properties on heat and mass transfer of pulsatile flow of non-Newtonian nanofluid flows between two porous parallel plates in the presence of Lorentz force are taken into account in this research.

Design/methodology/approach

The governing partial differential equations (PDEs) were nondimensionalized using suitable nondimensional quantities to transform the PDEs into a system of coupled nonlinear PDEs. The resulting equations are solved using the spectral relaxation method due to the effectiveness and accuracy of the method. The obtained velocity and temperature profiles are used to compute the entropy generation rate and Bejan number. The influence of various flow parameters on the velocity, temperature, entropy generation rate and Bejan number are discussed graphically.

Findings

The results indicate that the energy losses can be minimized in the system by choosing appropriate values for pertinent parameters; when thermal conductivity is increasing, this leads to the depreciation of entropy generation, and while this increment in thermal conductivity appreciates the Bejan number, the Eckert number on entropy generation and Bejan number, the graph shows that each time of increase in Eckert will lead to rising of entropy generation while this increase shows a reduction in Bejan number. To shed more light, these results were further demonstrated graphically. The current research was very well supported by prior literature works.

Originality/value

All results are presented graphically, and the results in this article are anticipated to be helpful in the area of engineering.

Details

World Journal of Engineering, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1708-5284

Keywords

Book part
Publication date: 14 May 2018

D. Kirk Davidson, Kanji Tanimoto, Laura Gyung Jun, Shallini Taneja, Pawan K. Taneja and Juelin Yin

The origins of corporate social responsibility (CSR) have been widely attributed to the work of scholars, and business managers as well, in North America and Western Europe…

Abstract

The origins of corporate social responsibility (CSR) have been widely attributed to the work of scholars, and business managers as well, in North America and Western Europe. Inevitably, however, as the economic interaction of individual firms and entire nations has grown over the past several decades — call it globalization — so too has the concept and the practice of CSR spread throughout the world. It is certainly time to explore how CSR is being incorporated into the practice of business management in other regions and other countries. Therefore, in this chapter we will focus on Asia: specifically on Japan, South Korea, India, and China. It is interesting for academicians to understand how CSR is being absorbed and adapted into the business cultures of these four countries. Perhaps of even greater importance, it is vital that business managers know what to expect about the interaction between business and society as well as the government as their commercial activities grow in this burgeoning part of the world.

For each of these four countries, we will provide an overview of the extent to which CSR has become a part of the academic community and also how it is being practiced and incorporated in everyday management affairs. We will see that there are very significant differences among these countries which lead to the natural question: why? To answer this question, we will use an eight-part analytical framework developed specifically for this purpose. We will look at the history, the dominant religious beliefs, the relevant social customs, the geography, the political structures, the level of economic development, civil society institutions, and the “safety net” of each country. As a result of this analysis, we believe, academicians can learn how CSR is absorbed and spread into commercial affairs, and managers can profit from learning more about what to expect when doing business in this increasingly important region.

Article
Publication date: 5 August 2021

Gladys Tharapatla, Pamula Rajakumari and Ramana G.V. Reddy

This paper aims to analyze heat and mass transfer of magnetohydrodynamic (MHD) non-Newtonian fluids flow past an inclined thermally stratified porous plate using a numerical…

Abstract

Purpose

This paper aims to analyze heat and mass transfer of magnetohydrodynamic (MHD) non-Newtonian fluids flow past an inclined thermally stratified porous plate using a numerical approach.

Design/methodology/approach

The flow equations are set up with the non-linear free convective term, thermal radiation, nanofluids and Soret–Dufour effects. Thus, the non-linear partial differential equations of the flow analysis were simplified by using similarity transformation to obtain non-linear coupled equations. The set of simplified equations are solved by using the spectral homotopy analysis method (SHAM) and the spectral relaxation method (SRM). SHAM uses the approach of Chebyshev pseudospectral alongside the homotopy analysis. The SRM uses the concept of Gauss-Seidel techniques to the linear system of equations.

Findings

Findings revealed that a large value of the non-linear convective parameters for both temperature and concentration increases the velocity profile. A large value of the Williamson term is detected to elevate the velocity plot, whereas the Casson parameter degenerates the velocity profile. The thermal radiation was found to elevate both velocity and temperature as its value increases. The imposed magnetic field was found to slow down the fluid velocity by originating the Lorentz force.

Originality/value

The novelty of this paper is to explore the heat and mass transfer effects on MHD non-Newtonian fluids flow through an inclined thermally-stratified porous medium. The model is formulated in an inclined plate and embedded in a thermally-stratified porous medium which to the best of the knowledge has not been explored before in literature. Two elegance spectral numerical techniques have been used in solving the modeled equations. Both SRM and SHAM were found to be accurate.

Details

World Journal of Engineering, vol. 20 no. 1
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 1 August 2004

Samuel O. Idowu and Brian A. Towler

The last few decades have seen an increase in awareness on the part of corporate entities in Western democracies that they are morally obliged to give something back to society. An

18168

Abstract

The last few decades have seen an increase in awareness on the part of corporate entities in Western democracies that they are morally obliged to give something back to society. An entity that fails to make a positive contribution to society will be perceived as being socially irresponsible! To demonstrate that they “care” about the people and environment they operate in, organisations have taken different courses of action. The corporate social responsibility (CSR) reports which have now become an annual report in addition to the traditional annual financial reports is one of the vehicles used to demonstrate how caring they have been over the financial period that has just ended and how they intend to continue to be even more so in future periods. The study looks at CSR reports of different companies across different industries in the UK. Notes that there are two distinct practices adopted when reporting on CSR matters. Some companies issue separate reports for their CSR activities whilst others devote a section in their annual reports for providing information on these activities. Also notes that all companies in the survey recognise the enormous benefits that can emanate from making known their CSR policies and activities. It can be revealed from the study that UK CSR reports disclose information about the contributions an entity has made during the year that has just ended in four main perspectives, which are environment, community, marketplace and workplace.

Details

Management of Environmental Quality: An International Journal, vol. 15 no. 4
Type: Research Article
ISSN: 1477-7835

Keywords

Article
Publication date: 14 March 2023

Florence Dami Ayegbusi, Emile Franc Doungmo Goufo and Patrick Tchepmo

The purpose of this study is to explore numerical scrutinization of micropolar and Walters-B non-Newtonian fluids motion under the influence of thermal radiation and chemical…

Abstract

Purpose

The purpose of this study is to explore numerical scrutinization of micropolar and Walters-B non-Newtonian fluids motion under the influence of thermal radiation and chemical reaction.

Design/methodology/approach

The two fluids micropolar and Walters-B liquid are considered to start flowing from the slot to the stretching sheet. A magnetic field of constant strength is imposed on their flow transversely. The problems on heat and mass transport are set up with thermal, chemical reaction, heat generation, etc. to form partial differential equations. These equations were simplified into a dimensionless form and solved using spectral homotopy analysis method (SHAM). SHAM uses the basic concept of both Chebyshev pseudospectral method and homotopy analysis method to obtain numerical computations of the problem.

Findings

The outcomes for encountered flow parameters for temperature, velocity and concentration are presented with the aid of figures. It is observed that both the velocity and angular velocity of micropolar and Walters-B and thermal boundary layers increase with increase in the thermal radiation parameter. The decrease in velocity and decrease in angular velocity occurred are a result of increase in chemical reaction. It is hoped that the present study will enhance the understanding of boundary layer flow of micropolar and Walters-B non-Newtonian fluid under the influences of thermal radiation, thermal conductivity and chemical reaction as applied in various engineering processes.

Originality/value

All results are presented graphically and all physical quantities are computed and tabulated.

Details

World Journal of Engineering, vol. 21 no. 3
Type: Research Article
ISSN: 1708-5284

Keywords

Book part
Publication date: 8 September 2023

Suzanne Grossman

While public libraries are well-established as a place to borrow books and use reference materials, they are less recognized for the services and programs they offer to their…

Abstract

While public libraries are well-established as a place to borrow books and use reference materials, they are less recognized for the services and programs they offer to their local communities. These programs and services often directly or indirectly impact the health of patrons and the larger community.

While some public libraries offer programs that address patron health in collaboration with other health professionals, such as those at local universities, public health departments, and other health-related organizations, these collaborations are often informal, offered for an indefinite period of time, and rely on finite funding. While public health professionals and organizations are often overlooked in public library collaborations, they are a natural fit for collaboration.

As public libraries serve the needs of vital and often vulnerable members of our communities, it is important to build sustainable community partnerships when offering programs and services that impact patron health. This will not only identify organizations committed to improving the health of these populations and those that provide reliable resources; it will also streamline information and provide consistent information to identify safe and reliable resources on social media, the internet, and in the community.

This chapter serves as a reflective narrative which explores how public libraries and community organizations can collaborate, identifies anticipated challenges, and describes considerations and strategies for addressing these challenges. The ultimate goal is to identify how libraries can expand the depth and breadth of both library services and public health organizations to sustainably improve the health of the local community.

Details

How Public Libraries Build Sustainable Communities in the 21st Century
Type: Book
ISBN: 978-1-80382-435-2

Keywords

Article
Publication date: 22 February 2021

Yuliansyah Yuliansyah, Ashfaq Ahmad Khan and Wijaya Triwacananingrum

This study aims to highlight the significance of Performance Measurement System (PMS) as an “interactive” system that adapts to the organization's peculiar operational setup…

Abstract

Purpose

This study aims to highlight the significance of Performance Measurement System (PMS) as an “interactive” system that adapts to the organization's peculiar operational setup, thereby delivering optimal employee performance management benefits. Using Schatzki's (2002) “site of the social” theoretical conceptualization, it aims to empirically investigate the influence PMS's such strategic adaptation could have on employees' team performance through its mediating effect on improving organizational learning and knowledge sharing.

Design/methodology/approach

In pursuit of the set objective, we conducted a survey of 200 employees in public accounting firms located in the two major Indonesian cities of Jakarta and Surabaya. The survey yielded 89 responses of which 87 were deemed fit for empirical analyses. The statistical analyses of the data were performed using SmartPLS.

Findings

The statistical analyses using SmartPLS found evidence that the strategic use of the PMS positively influences team performance, both directly and indirectly, through its role in enhancing organizational learning; however, its role in enhancing knowledge sharing did not demonstrate leveraging team performance.

Research limitations/implications

The study conclusions are based on a relatively small data sample and the context of a developing economy, and, hence, need to be replicated with caution.

Originality/value

The study contributes to the management accounting theory and practice and emphasizes the strategic use of PMS to help improve organizational performance. Its novel “site” and context directs researchers' and practitioners' attention to the “interactive”, rather than passive and standalone, use of PMS to influence team performance and instigates a new debate on the management tool's optimal use.

Details

International Journal of Productivity and Performance Management, vol. 71 no. 5
Type: Research Article
ISSN: 1741-0401

Keywords

Article
Publication date: 27 April 2020

Moses Sunday Dada and Cletus Onwubuoya

The purpose of this paper is to consider heat and mass transfer on magnetohydrodynamics (MHD) Williamson fluid flow over a slendering stretching sheet with variable thickness in…

Abstract

Purpose

The purpose of this paper is to consider heat and mass transfer on magnetohydrodynamics (MHD) Williamson fluid flow over a slendering stretching sheet with variable thickness in the presence of radiation and chemical reaction. All pertinent flow parameters are discussed and their influence on the hydrodynamics, thermal and concentration boundary layer are presented with the aid of the diagram.

Design/methodology/approach

The governing partial differential equations are reduced into a system of ordinary differential equations with the help of suitable similarity variables. A discrete version of the homotopy analysis method (HAM) called the spectral homotopy analysis method (SHAM) was used to solve the transformed equations. SHAM is efficient, and it converges faster than the HAM. The SHAM provides flexibility when solving linear ordinary differential equations with the use of the Chebyshev spectral collocation method.

Findings

The findings revealed that an increase in the variable thermal conductivity hike the temperature and the thermal boundary layer thickness, whereas the reverse is the case for velocity close to the wall.

Originality/value

The uniqueness of this paper is the exploration of combined effects of heat and mass transfer on MHD Williamson fluid flow over a slendering stretching sheet. The Williamson fluid term in the momentum equation is expressed as a linear function and the viscosity and thermal conductivity are considered to vary in the boundary layer.

Details

World Journal of Engineering, vol. 17 no. 3
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 14 January 2022

Ayegbusi Dami Florence

The purpose of this paper is to consider the simultaneous flow of Casson Williamson non Newtonian fluids in a vertical porous medium under the influence of variable…

Abstract

Purpose

The purpose of this paper is to consider the simultaneous flow of Casson Williamson non Newtonian fluids in a vertical porous medium under the influence of variable thermos-physical parameters.

Design/methodology/approach

The model equations are a set of partial differential equations (PDEs). These PDEs were transformed into a non-dimensionless form using suitable non-dimensional quantities. The transformed equations were solved numerically using an iterative method called spectral relaxation techniques. The spectral relaxation technique is an iterative method that uses the Gauss-Seidel approach in discretizing and linearizing the set of equations.

Findings

It was found out in the study that a considerable number of variable viscosity parameter leads to decrease in the velocity and temperature profiles. Increase in the variable thermal conductivity parameter degenerates the velocity as well as temperature profiles. Hence, the variable thermo-physical parameters greatly influence the non-Newtonian fluids flow.

Originality/value

This study considered the simultaneous flow of Casson-Williamson non-Newtonian fluids by considering the fluid thermal properties to vary within the fluid layers. To the best of the author’s knowledge, such study has not been considered in literature.

Details

World Journal of Engineering, vol. 20 no. 3
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 8 June 2021

Ratnadeep Nath and Krishnan Murugesan

This study aims to investigate the buoyancy-induced heat and mass transfer phenomena in a backward-facing-step (BFS) channel subjected to applied magnetic field using different…

Abstract

Purpose

This study aims to investigate the buoyancy-induced heat and mass transfer phenomena in a backward-facing-step (BFS) channel subjected to applied magnetic field using different types of nanofluid.

Design/methodology/approach

Conservation equations of mass, momentum, energy and concentration are used through velocity-vorticity form of Navier–Stokes equations and solved using Galerkin’s weighted residual finite element method. The density variation is handled by Boussinesq approximation caused by thermo-solutal buoyancy forces evolved at the channel bottom wall having high heat and concentration. Simulations were carried out for the variation of Hartmann number (0 to 100), buoyancy ratio (−10 to +10), three types of water-based nanofluid i.e. Fe3O4, Cu, Al2O3 at χ = 6%, Re = 200 and Ri = 0.1.

Findings

The mutual interaction of magnetic force, inertial force and nature of thermal-solutal buoyancy forces play a significant role in the heat and mass transport phenomena. Results show that the size of the recirculation zone increases at N = 1 for aiding thermo-solutal buoyancy force, whereas the applied magnetic field dampened the fluid-convection process. With an increase in buoyancy ratio, Al2O3 nanoparticle shows a maximum 54% and 67% increase in convective heat and mass transfer, respectively at Ha = 20 followed by Fe3O4 and Cu. However, with increase in Ha the Nuavg and Shavg diminish by maximum 62.33% and 74.56%, respectively, for Fe3O4 nanoparticles at N = 5 followed by Al2O3 and Cu.

Originality/value

This research study numerically examines the sensitivity of Fe3O4, Cu and Al2O3 nanoparticles in a magnetic field for buoyancy-induced mixed convective heat and mass transfer phenomena in a BFS channel, which was not analyzed earlier.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 32 no. 3
Type: Research Article
ISSN: 0961-5539

Keywords

1 – 10 of 640