S. Abbasbandy and H. Roohani Ghehsareh
In this paper, an analysis is performed to find the solution of a nonlinear ordinary differential equation that appears in a model for MHD viscous flow caused by a shrinking sheet.
Abstract
Purpose
In this paper, an analysis is performed to find the solution of a nonlinear ordinary differential equation that appears in a model for MHD viscous flow caused by a shrinking sheet.
Design/methodology/approach
The cases of two dimensional and axisymmetric shrinking have been discussed. When the sheet is shrinking in the x‐direction, the analytical solutions are obtained by the Hankel‐Padé method. Comparison to exact solutions reveals reliability and high accuracy of the procedure, even in the case of multiple solutions. The case of sheet shrinking in the y‐direction is also considered, with success.
Findings
When the sheet shrinks in the x‐direction, the analytical solutions are obtained by Hankel‐Padé method. Also, when the sheet shrinks in the y‐direction, the obtained results with Hankel‐Padé method are presented.
Practical implications
Comparison to exact solutions reveals reliability and high accuracy of the procedure and convincingly could be used to obtain multiple solutions for certain parameter domains of this case of the governing nonlinear problem.
Originality/value
The numerical solutions are given for both two‐dimensional and axisymmetric shrinking sheets by using Hankel‐Padé method. It is clear that the Hankel‐Padé method is, by far, more simple, straightforward and gives reasonable results for large Hartman numbers and suction parameters.
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Paul Jeremy Williams, M. Sajid Khan, Rania Semaan, Earl R. Naumann and Nicholas Jeremy Ashill
A key issue for B2B industrial firms is to better understand the drivers of customer value and contract renewal decisions, due to the long-term supplier-customer relationships…
Abstract
Purpose
A key issue for B2B industrial firms is to better understand the drivers of customer value and contract renewal decisions, due to the long-term supplier-customer relationships. When the B2B firm is operating across national boundaries, there is added complexity to the renewal decision, because the drivers are also influenced by cultural considerations. The purpose of this paper is to examine the main drivers of customer value creation and contract renewal intentions, for a large B2B firm operating in both the USA and Japan and compare the two data sets.
Design/methodology/approach
The company, which provided the data for the study, is a US Fortune 100 firm in the facilities management industry, operating worldwide. Data were collected using a survey questionnaire from a sample of the firm’s customers in two of its largest markets, the USA and Japan. The authors used PLS to analyze the data, and compare and contrast the drivers.
Findings
The findings highlight both similarities and differences across the two countries for the most influential drivers of customer value and contract renewal. Although no differences were found when examining the effect of relational drivers on contract renewal, differences were observed for utilitarian drivers: product quality and price.
Practical implications
The authors expected the relational drivers of contract renewal to be stronger in the high-context culture of Japan, but found that there were no differences with the US market. While relational drivers are important in the decision-making process in both countries, it seems that managers should focus more on price considerations in Japan. In contrast, product quality is relatively more important in the USA, when negotiating contract renewals with customers.
Originality/value
Noticeably absent from the B2B services literature is its application to international markets. In particular, research is lacking on the specific drivers of customer value and contract renewal intentions in the USA and Japan, despite the importance of long-term on-going contractual relationships in these markets. This study has provided additional insights into the complex world of contract renewal between international buyers and sellers of large industrial systems.
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Abdelkader Daghfous, Abroon Qazi and M. Sajid Khan
The literature on supply chain risk management (SCRM) has investigated a multitude of supply chain risks. This paper aims to make a case for the importance of managing the risk of…
Abstract
Purpose
The literature on supply chain risk management (SCRM) has investigated a multitude of supply chain risks. This paper aims to make a case for the importance of managing the risk of knowledge loss in the supply chain management (SCM) function and incorporating knowledge loss as a critical risk within the SCRM process.
Design/methodology/approach
This paper adopts a knowledge-based view of the SCRM process and attempts to bring to light insights based on a synthesis of the relevant literature. The authors conducted a systematic literature review of peer-reviewed articles published between 1998 and 2019. Further, a case study was conducted to illustrate the significance of the risk of knowledge loss in the SCM function in terms of how it operates and why it has such a significant impact on performance.
Findings
Knowledge loss is a relatively neglected type of supply chain risk that can be added to the existing typologies. This paper argues that knowledge loss in the SCM function has the propensity to significantly impact the performance of the focal firm, exacerbate other types of supply chain risk and impede risk mitigation efforts. We put forth several strategies that supply chain managers can adopt to mitigate the risk of knowledge loss in their function.
Research limitations/implications
This paper generates an exploratory opening that could pave the way for a systematic theory of knowledge loss as a supply chain risk and future empirical research. The study culminates in a number of important insights and initiatives for supply chain managers to recognize and manage the risk of knowledge loss.
Originality/value
This paper argues for the importance of incorporating the risk of knowledge loss in SCRM research and practice. It also provides an examination of some promising angles for future research in SCRM from a knowledge-based perspective.
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Jessica C. Murray, Robert J. Harrington, Prakash K. Chathoth and M. Sajid Khan
This study aims to explore memory-dominant logic (MDL) in the luxury hotel context to assess the flow of management experience decisions to memorable experiences, which lead to…
Abstract
Purpose
This study aims to explore memory-dominant logic (MDL) in the luxury hotel context to assess the flow of management experience decisions to memorable experiences, which lead to guest outcomes. While research into memorable experiences has gained traction, the theoretical underpinnings of what makes an experience memorable in a luxury hotel setting are not well documented.
Design/methodology/approach
A grounded theory, qualitative methodology was used to assess MDL value transformation. Inductive methods included conducting in-depth interviews with hotel managers and analyzing social media reviews for each hotel. Guest reviews served as an indicator of memory outcomes and the counterpoint to the managerial interviews, supporting or refuting interview findings.
Findings
Key dimensions emerged, emphasizing the importance of managerial inputs to experience design, service experience attributes and memorable experience creation, demonstrating a sequence of memory-based value creation and outcomes such as positive word of mouth/electronic word of mouth (WOM/eWOM). Sentiment analysis identified attributes that appear to be a “must-have” to avoid dissatisfaction, as well as areas at risk for negative memories. Dimensions were developed into a framework using themes derived from MDL value transformation, management and consumer inputs that influence memorable experience outcomes in this context.
Research limitations/implications
The study supported the MDL theoretical framework by illustrating the flow from managerial inputs to the service experience, to elements of experience co-creation, and through to the guests’ WOM/eWOM and experience memories. The findings highlighted the symbiotic relationship between firm culture and service experience design, providing guidance for managerial practice going forward.
Originality/value
This paper uncovers major themes and dimensions identified by guests and managers as necessary in creating memorable experiences in a luxury setting and develops a framework that serves as a foundation for further study, including anteceding factors and their impact on hedonic consumption across experience domains.
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Sanatan Das, Akram Ali and Rabindra Nath Jana
Outstanding features such as thermal conductivity and superior electrical conductivity of nanofluids unfold a new window in the context of their extensive applications in…
Abstract
Purpose
Outstanding features such as thermal conductivity and superior electrical conductivity of nanofluids unfold a new window in the context of their extensive applications in engineering and industrial domains. The purpose of this study to simulate numerically the magneto-nanofluid flow and heat transfer over a curved stretching surface. Heat transport is explored in the presence of viscous dissipation. At the curved surface, the convective boundary condition is adopted. Three different nanoparticles, namely, copper, aluminium oxide and titanium dioxide are taken into consideration because of easily available in nature.
Design/methodology/approach
The basic flow equations are framed in terms of curvilinear coordinates. The modelled partial differential equations are transformed into a system of non-linear ordinary differential equations by means of appropriate similarity transformation. The subsequent non-linear system of equations is then solved numerically by using the Runge–Kutta–Felhberg method with the shooting scheme via bvp4c MATLAB built-in function. Impacts of various physical parameters on velocity, pressure and temperature distributions, local skin-friction coefficient, local Nusselt number and wall temperature are portrayed through graphs and tables followed by a comprehensive debate and physical interpretation.
Findings
Graphical results divulge that augmenting values of the magnetic parameter cause a decline in velocity profiles and stream function inside the boundary layer. The magnitude of the pressure function inside the boundary layer reduces for higher estimation of curvature parameter, and it is also zero when the curvature parameter goes to infinity. Furthermore, the temperature is observed in a rising trend with growing values of the magnetic parameter and Biot number.
Practical implications
This research study is very pertinent to the expulsion of polymer sheet and photographic films, metallurgical industry, electrically-conducting polymer dynamics, magnetic material processing, rubber and polymer sheet processing, continuous casting of metals, fibre spinning, glass blowing and fibre, wire and fibre covering and sustenance stuff preparing, etc.
Originality/value
Despite the huge amount of literature available, but still, very little attention is given to simulate the flow configuration due to the curved stretching surface with the convective boundary condition. Very few papers have been examined on this topic and found that its essence inside the boundary layer is not any more insignificant than on account of a stretching sheet. A numerical comparison with the published works is conducted to verify the accuracy of the present study.
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S.A. Shehzad, M. Qasim, T. Hayat, M. Sajid and S. Obaidat
– The purpose of this paper is to investigate the two-dimensional flow of Maxwell fluid with power law heat flux and heat source over a stretched surface.
Abstract
Purpose
The purpose of this paper is to investigate the two-dimensional flow of Maxwell fluid with power law heat flux and heat source over a stretched surface.
Design/methodology/approach
The governing partial differential equations are reduced into ordinary differential equations by applying similarity transformations. Series solutions of velocity and temperature are found by adopting homotopy analysis method (HAM).
Findings
It is found that the velocity decreases by increasing Deborah number and suction parameter. It is also observed that the heat generation parameter leads to a decrease in temperature. Furthermore, the numerical values of local Nusselt number decreased with an increase in Deborah number.
Practical implications
A useful source of information for the investigators on the field of non-Newtonian fluids with heat transfer.
Originality/value
This paper discusses the boundary layer flow of Maxwell fluid with power law heat flux in the presence of heat source.
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Sabeeh Khaliq, Zaheer Abbas, Moin-ud-Din Junjua, Rajesh Ram, Hasan Shahzad and Muhammad Yousuf Rafiq
The coating process increases the durability, quality and effectiveness of the web, is used in manufacturing of wallpapers, adhesive tapes, wrapping, protection of fabrics and…
Abstract
Purpose
The coating process increases the durability, quality and effectiveness of the web, is used in manufacturing of wallpapers, adhesive tapes, wrapping, protection of fabrics and metals, X-ray and photographic films, beautification, books and magazines, film foils, magnetic records, coated paper, etc.
Design/methodology/approach
This paper gives a detailed study of the Oldroyd-4 constant fluid rheology during blade coating technique to check the sensitivity of velocity slippage on blade surface and magnetohydrodynamics (MHD) on final coating thickness and other mechanical properties. Heat transfer effects are also considered with viscous dissipation. The governing expressions under Lubrication Approximation Theory (LAT) are shortened and non-dimensionalized. A numerical technique with root finding algorithm is employed to determine the velocity profile, pressure and pressure gradient, shear stress, coating thickness, blade load and temperature profile. Figures and tables are exploited to show and discuss the effects of Hartmann number, slip parameter, geometrical parameter and viscoelastic fluid parameters on the flow and mechanical quantities. Comparison is also presented with previous literature under specific conditions.
Findings
From a technical vantage point, blade load and pressure are significant results of research as they lead to varying coating thickness, which gives an efficient coating process and extends substrate life. Shear stress is directly proportional to the magnetic parameter and inversely proportional to velocity slippage on blade surface. Temperature curve increases with increment in magnetic parameter and Brinkman number, while decrease in temperature is detected from slip parameter.
Originality/value
In literature, this investigation fills a gap in the numerical prediction of slip and MHD effects on the thin layer coating of rheological viscoelastic fluid during blade coating phenomena.
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Keywords
Abstract
Purpose
This paper looks into the rotating flow of an incompressible viscous fluid over an exponentially stretching continuous surface. The flow is governed by non‐linear partial differential equations. A non‐similar solution is developed after transforming the governing equations using two different numerical techniques namely Keller‐box and shooting methods. The influence of the non‐dimensional local rotating parameter Ω on the velocity fields and skin friction coefficients is analyzed and discussed.
Design/methodology/approach
In this paper, the authors have used the well‐known numerical methods, Keller‐box and shooting.
Findings
It is observed that for the increase in the rotation velocity of the frame there is a reduction in the boundary layer thickness and an increase in the drag force at the surface.
Originality/value
The present study is concerned with the boundary layer flow of a rotating viscous fluid over an exponentially stretching sheet. Numerical solutions are found. To the best of the authors' knowledge, this is the first investigation of the topic.
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Ioan Pop, Siti Suzilliana Putri Mohamed Isa, Norihan M. Arifin, Roslinda Nazar, Norfifah Bachok and Fadzilah M. Ali
The purpose of this paper is to theoretically study the problem of the unsteady boundary layer flow past a permeable curved stretching/shrinking surface in the presence of a…
Abstract
Purpose
The purpose of this paper is to theoretically study the problem of the unsteady boundary layer flow past a permeable curved stretching/shrinking surface in the presence of a uniform magnetic field. The governing nonlinear partial differential equations are converted into ordinary differential equations by similarity transformation, which are then solved numerically.
Design/methodology/approach
The transformed system of ordinary differential equations was solved using a fourth-order Runge-Kutta integration scheme. Results for the reduced skin friction coefficient and velocity profiles are presented through graphs and tables for several sets of values of the governing parameters. The effects of these parameters on the flow characteristics are thoroughly examined.
Findings
Results show that for the both cases of stretching and shrinking surfaces, multiple solutions exist for a certain range of the curvature, mass suction, unsteadiness, stretching/shrinking parameters and magnetic field parameter.
Originality/value
The paper describes how multiple (dual) solutions for the flow reversals are obtained. It is shown that the solutions exist up to a critical value of the shrinking parameter, beyond which the boundary layer separates from the surface and the solution based upon the boundary layer approximations is not possible.