bluuebunny/crossref_metadata_2025_split huggingface dataset:
Aerodynamics in the open channel of the Sistan-type wind-mill with vertical axis wind turbine
Authors: Baïri Abderrahmane , San Martin David , Baïri Iken , Adeyeye Kemi , She Kaiming , Hocine Ali , Alilat Nacim , Lamriben Cyril , Bauzin Jean-Gabriel , Chanetz Bruno , Laraqi Najib 
Published: November 2016

Purpose
The purpose of this paper is to examine the details of the air mass flow and aerodynamical phenomena across a channel containing a large vertical axis wind turbine. The considered model reproduces as closely as possible the real assembly of the Sistan-type wind-mill whose top is open. The technical results of this work could be used for the restoration and operation of this assembly whose historical and architectural values are recognized.

Design/methodology/approach
Several inlet velocities into the channel are considered, taking into account the possible local wind resources. Calculations corresponding to Reynolds number varying between 8×105 and 4×106 are made by means of the finite volume method and turbulence is treated with the realizable k-ε model. The mesh consists of a fixed part associated to the contour of the channel, interfaced with a moving one linked to the turbine itself, equipped with nine partly filled wings.

Findings
The relative pressure and velocity fields are presented for various dynamic and static conditions. Calculation results clearly show that the vortex phenomena present in some cases are not a source of degradation of the wind turbine’s aerodynamical performances, given its location, intensity and rotation direction. Particular attention is devoted to the air mass flow and its distribution between the inlet and the outlet sections of the channel.

Originality/value
The present work provides technical information useful to consider the restoration and modernization of this installation whose architecture and technical performance are very interesting. This survey complements a previous one examining the aerodynamical phenomena occurring in a modified version of this assembly with a closed top channel.
Lattice Boltzmann simulation of transient natural convection of air in square cavity under a magnetic quadrupole field
Authors: Xie Nan , He Yihai , Yao Ming , Jiang Changwei 
Published: November 2016

Purpose
The purpose of this paper is to apply the lattice Boltzmann method (LBM) with multiple distribution functions model, to simulate transient natural convection of air in a two-dimensional square cavity in the presence of a magnetic quadrupole field, under non-gravitational as well as gravitational conditions.

Design/methodology/approach
The density-temperature double distribution functions and D2Q9 model of LBM for the momentum and temperature equations are currently employed. Detailed transient structures of the flow and isotherms at unsteady state are obtained and compared for a range of magnetic force numbers from 1 to 100. Characteristics of the natural convection at initial moment, quasi-steady state and steady state are presented in present work.

Findings
At initial time, effects of the magnetic field and gravity are both relatively limited, but the effects become efficient as time evolves. Bi-cellular flow structures are obtained under non-gravitational condition, while the flow presents a single vortex structure at first under gravitational condition, and then emerges a bi-cellular structure with the increase of magnetic field force number. The average Nusselt number generally increases with the augment of magnetic field intensity.

Practical implications
This paper will be useful in the researches on crystal material and protein growth, oxygen concentration sensor, enhancement or suppression of the heat transfer in micro-electronics and micro-processing technology, etc.

Originality/value
The current study extended the application of LBM on the transient natural convective problem of paramagnetic fluids in the presence of an inhomogeneous magnetic field.
Exact and approximate analytic solutions of the thin film flow of fourth-grade fluids by the modified Adomian decomposition method
Authors: Bougoffa Lazhar , Duan Jun-Sheng , Rach Randolph 
Published: November 2016

Purpose
The purpose of this paper is to first deduce a new form of the exact analytic solution of the well-known nonlinear second-order differential equation subject to a set of mixed nonlinear Robin and Neumann boundary conditions that model the thin film flows of fourth-grade fluids, and second to compare the approximate analytic solutions by the Adomian decomposition method (ADM) with the new exact analytic solution to validate its accuracy for parametric simulations of the thin film fluid flows, even for more complex models of non-Newtonian fluids in industrial applications.

Design/methodology/approach
The approach to calculating a new form of the exact analytic solution of thin film fluid flows rests upon a sequence of transformations including the modification of the classic technique due to Scipione del Ferro and Niccolò Fontana Tartaglia. Next the authors establish a lemma that justifies the new expression of the exact analytic solution for thin film fluid flows of fourth-grade fluids. Second, the authors apply a modification of the systematic ADM to quickly and easily calculate the sequence of analytic approximate solutions for this strongly nonlinear model of thin film flow of fourth-grade fluids. The ADM has been previously demonstrated to be eminently practical with widespread applicability to frontier problems arising in scientific and engineering applications. Herein, the authors seek to establish the relative merits of the ADM in the context of the thin film flows of fourth-grade fluids.

Findings
The ADM is shown to closely agree with the new expression of the exact analytic solution. The authors have calculated the error remainder functions and the maximal error remainder parameters in the error analysis to corroborate the solutions. The error analysis demonstrates the rapid rate of convergence and that we can approximate the exact solution as closely as we please; furthermore the rate of convergence is shown to be approximately exponential, and thus only a low-stage approximation will be adequate for engineering simulations as previously documented in the literature.

Originality/value
This paper presents an accurate work for solving thin film flows of fourth-grade fluids. The authors have compared the approximate analytic solutions by the ADM with the new expression of the exact analytic solution for this strongly nonlinear model. The authors commend this technique for more complex thin film fluid flow models.
3D natural convection on a horizontal and vertical thermally active plate in a closed cubical cavity
Authors: Purusothaman Abimanyu , Baïri Abderrahmane , Nithyadevi Nagarajan 
Published: November 2016

Purpose
The purpose of this paper is to examine numerically the natural convection heat transfer in a cubical cavity induced by a thermally active plate. Effects of the plate size and its orientation with respect to the gravity vector on the convective heat transfer and the flow structures inside the cavity are studied and highlighted.

Design/methodology/approach
The numerical code is based on the finite volume method with semi-implicit method for pressure-linked equation algorithm. The convective and diffusive terms in momentum equations are handled by adopting the power law scheme. Finally, the discretized sets of algebraic equations are solved by the line-by-line tri-diagonal matrix algorithm.

Findings
The results show that plate orientation and size plays a significant role on heat transfer. Also, the heat transfer rate is an increasing function of Rayleigh number for both orientations of the heated plate. Depending on the thermal management of the plate and its application (as in electronics), the heat transfer rate is maximized or minimized by selecting appropriate parameters.

Research limitations/implications
The flow is assumed to be 3D, time-dependent, laminar and incompressible with negligible viscous dissipation and radiation. The fluid properties are assumed to be constant, except for the density in the buoyancy term that follows the Boussinesq approximation.

Originality/value
The present work will give some additional knowledge in designing sealed cavities encountered in some engineering applications as in aeronautics, automobile, metallurgy or electronics.
Dual solutions for nonlinear boundary value problems by the Adomian decomposition method
Authors: Wazwaz Abdul-Majid , Rach Randolph , Bougoffa Lazhar 
Published: November 2016

Purpose
The purpose of this paper is to use the Adomian decomposition method (ADM) for solving boundary value problems with dual solutions.

Design/methodology/approach
The ADM has been previously demonstrated to be eminently practical with widespread applicability to frontier problems arising in scientific applications. In this work, the authors seek to determine the relative merits of the ADM in the context of several important nonlinear boundary value models characterized by the existence of dual solutions.

Findings
The ADM is shown to readily solve specific nonlinear BVPs possessing more than one solution. The decomposition series solution of these models requires the calculation of the Adomian polynomials appropriate to the particular system nonlinearity. The authors show that the ADM solves these models for any analytic nonlinearity in a practical and straightforward manner. The conclusions are supported by several numerical examples arising in various scientific applications which admit dual solutions.

Originality/value
This paper presents an accurate work for solving nonlinear BVPs that possess dual solutions. The authors have demonstrated the widespread applicability of the ADM for solving various forms of these nonlinear equations.
Tribological properties of self-lubricating bronze-graphite composite against Fe-based alloys
Authors: Toktaş Gülcan , Öztürk Yılmaz İmren 
Published: November 2016

Purpose
The purpose of this study is to investigate the tribological properties of society of automotive engineers (SAE) 430B bronze-graphite composite, supplied in the form of machined and graphite embedded, used in sheet forming industry.

Design/methodology/approach
Pin-on-disc wear tests were performed under a constant normal load of 15 N and a sliding velocity of 60 mm/s. Due to the extended usage of Fe-based alloys in forming dies, pin materials were selected as cold work tool steel, gray and ductile irons. The weight losses of the disc (SAE 430B bronze-graphite composite) and the pins (Fe-based alloys) were measured separately under various sliding distances (5,000, 10,000 and 15,000 m). The average friction coefficients and wear tracks were obtained.

Findings
It is concluded that dry sliding behavior of SAE 430B bronze-graphite composite is the worst when operated with GGG-70 ductile iron due to its highest abrasive effect. The high hardness and nodular shape of graphite increased the abrasiveness of ductile iron. The improvement in wear resistance reached up to maximum 90 per cent and the degradation in friction coefficient was about 50 per cent by embedding graphite solids in bronze disc at dry sliding conditions.

Originality/value
Although the machined and graphite embedded bronze composites are indispensable parts of forming dies, there is no scientific knowledge on their dry sliding behavior.
Effect of element contents on friction and wear behaviors of ternary nitride coatings
Authors: Yan Pei , Wang Xibin , Jiao Li 
Published: November 2016

Purpose
The purpose of this study was to clarify the applicable conditions for coatings with different element contents. Surface coating on existed tool material is an effective way to improve the cutting tool properties in extremely adverse machining conditions. These coatings are generally non-metering compounds. Each coating with a certain element ratio has a specific application condition, and the relationship between element contents and performance should be defined.

Design/methodology/approach
(Zr, Ti)N hard coatings with different element contents were deposited on cemented carbide. The ball-on-disk method reciprocating sliding wear tests against 40Cr hardened steel were carried out. This paper was focused on analysis of the friction and wear behaviors of these (Zr, Ti)N coatings with different element contents.

Findings
The results indicated that atomic ratio of Zr and Ti was the main factor that decided the friction coefficients. The friction coefficient and wear rate showed a gradual downward trend at 10 N with the increase of Zr content. The wear rate was the smallest at the atomic percentage of nitrogen 0.466. If the lattice distortion of the coatings gets too severe, the coatings would have a high wear rate.

Originality/value
The optimal application conditions of the coatings were defined, and this was important for customized design or choice of the coatings under different cutting parameters.
Effect of tooth waist order parameters of double involute gears on lubrication performance of gear drive
Authors: Fan Zhimin , Zhou Wanfeng , Wang Ruixue , Wang Na 
Published: November 2016

Purpose
The purpose of this paper is to derive a new lubrication model of double involute gears drive and study the effect of the tooth waist order parameters of double involute gears on lubrication performance.

Design/methodology/approach
The new lubrication model of double involute gears drive was established according to the meshing characteristics of double involute gears drive and the finite length line contact elastohydrodynamic lubrication theory. Numerical calculation of the lubrication model of gear drive was conducted using the multigrid method.

Findings
The results show that the oil film necking phenomenon and the oil film pressure peak emerged at the tooth waist order area and the tooth profile ends, and when compared with involute gear, the lubrication performance at the tooth waist order area is better than that at the tooth profile ends. The effect of tooth waist order parameters on lubrication performance at the tooth waist order area was greater than that at other areas.

Originality/value
This research will promote the application of the double involute gear as soon as possible, and it has the reference value for other types of gears.
Experimental study for performance evaluation of steadily loaded true elliptical and orthogonally displaced non-circular journal bearing profiles
Authors: Singla Amit , Chauhan Amit 
Published: November 2016

Purpose
The non-circular journal bearings may be used over circular journal bearings because of their superior thermal stability. The paper aims at experimental study of thermal performance of two different true elliptical and orthogonally displaced non-circular journal bearing profiles.

Design/methodology/approach
The experiments have been conducted on a specially designed test rig which simultaneously evaluates oil film pressure and temperature along the circumference of non-circular journal bearing. The tests are conducted for the designed true elliptical and orthogonally displaced journal bearing at three different rotational speeds of 2,000, 3,000 and 4,000 rpm under the influence of steadily applied load varied from 0.5 to 2.0 kN. The data collected during experimentation have been used to evaluate thermal performance parameters such as maximum pressure, flow rate and effective temperature of the bearings under study.

Findings
It has been observed experimentally that two lobes of pressure and temperature have been obtained for both the elliptical and orthogonally displaced journal bearing. The negative pressure zone (cavitation area) has been observed to be reduced along the circumference for both the journal bearings which results in less thermal degradation of an oil as compared to circular journal bearing. The oil film pressure and temperature increases with the increase in radial load of both the bearings. The maximum temperature rise of oil film is more in case of elliptical bearing as compared to the orthogonally displaced bearing.

Originality/value
The experimental data presented in this paper will help the designers to select such kind of non-circular journal bearing for various applications. The designed bearings have resulted in reduced cavitation zone and two positive pressure lobes have been observed which may result in application of such bearings as an alternate for circular journal bearing.
The experimental optimization of abrasive wear resistance model for an in-situ AlB2/Al-4Cu metal matrix composite
Authors: Ficici Ferit 
Published: November 2016

Purpose
The paper aims to describe the Taguchi design method-based abrasive wear modeling of in situ AlB2 flake reinforced Al-4Cu matrix alloy composites.

Design/methodology/approach
The abrasive wear behaviors of the composite samples were investigated using pin-on-disk method where the samples slid against different sizes of SiC abrasive grits under various testing conditions. The orthogonal array, signal-to-noise (S/N) ratio and analysis of variance were used to study the optimal testing parameters on composite samples.

Findings
The weight loss of composites decreased with increasing grit size and percentage reinforcement and increased with increasing sliding speed. The optimum test condition, at which the minimum weight loss is obtained, has been determined to be A3B3C1 levels of the control factors. Deviations between the actual and the predicted S/N ratios for abrasive weight losses are negligibly small with 99.5 per cent confidence level.

Originality/value
This paper fulfils an identification of Taguchi method-based abrasive wear behavior of AlB2/Al-4Cu metal matrix composites produced by squeeze casting under various testing conditions.
Critical success factors of ERP benefits in CREM: evidence from Austria, Germany and Switzerland
Authors: Janßen-Tapken Damir , Pfnür Andreas 
Published: November 2016

Purpose
The purpose of this study is to find answers to the question whether a fully-integrated real estate (RE) solution within an Enterprise Resource Planning (ERP) landscape delivers a visible and measurable contribution to organizational efficiency in corporate real estate management (CREM), a field still dominated by specialized, but stand-alone software packages.

Design/methodology/approach
The authors set up a model of CREM with the enterprise resource planning (ERP) systems being the hinge between the RE strategies and organizational efficiency. The model was tested by a written questionnaire to respond on the benefit expectations on ERP benefits.

Findings
In many cases, the results show a negative gap between expectations and realized benefits. The authors identified benefit stars and dogs within the sample. Stars realizing high benefit ratios on average have more often chosen the form of a shared service center for their CREM department, have reengineered the business processes more intensively, had more often a legacy system as a predecessor of the SAP ERP, trained employees more intensively and showed a higher degree of customization of the RE module than the benefit dogs of the sample.

Practical implications
Newly formed CREM departments looking for optimal IT solutions find decision support regarding the best fit for their IT landscape. Already institutionalized CREM units running an ERP system will find concrete evidence for improvement.

Originality/value
This is the first study of benefits and critical success factors of ERP implementation and operation for modern CREM. It is the attempt to bridge the gap between business and IT, showing the enabler role of ERP systems for efficient business processes, satisfied corporate users and motivated employees.
Commercial leases in the UK regions: business as usual?
Authors: McCluskey Danielle , Lim Lay Cheng , McCord Michael , Davis Peadar Thomas 
Published: November 2016

PurposeThe purpose of this paper is to analyse the changing nature of commercial leases with specific reference to the landlord and tenant relationship, lease lengths and incentivisation in the post-recessionary UK property market.Design/methodology/approachThe research applies data analysis utilising the Estates Gazette Interactive database coupled with survey analysis conducted across three UK cities to investigate and compare the changing nature of the commercial property leasing market and the landlord and tenant relationship.FindingsThe empirical analysis highlights that recessionary conditions prevalent in the market from the 2007 global crisis has caused a reassessment of lease structures, leading to shorter lease terms and increased use of incentives, as tenants have been empowered to negotiate more flexible leases due to their stronger market position.Originality/valueThis paper builds upon previous research conducted back in 2005, investigating commercial leases in the market up-cycle. The recent volatility in the commercial property sector requires fresh insights and in-depth analysis of lease patterns, length and covenant strength, which is fundamental for investor decision-making. In addition, past research has tended to consider solely landlord or occupier perspectives, whereas this research offers new insight into the landlord–tenant lease negotiation process.
Effects of experiential stimuli on customers’ responses
Authors: Lee Seonjeong Ally , Jeong Miyoung , Jeon Myunghee Mindy 
Published: November 2016

Purpose
The purpose of this study is to propose four experiential components of e-servicescape that influence customers’ pleasure emotions, satisfaction with bed and breakfast (b&b) websites and behavioral intentions in the context of the b&b industry.

Design/methodology/approach
This study is based on a cross-sectional, self-administered online survey from b&b customers.

Findings
This study identifies that both perceived enjoyment and social presence represent positive effects on customers’ pleasure emotions and satisfaction with b&b websites. However, flow experience only influences customers’ pleasure emotions, and interactivity only affects customers’ satisfaction with b&b websites. Results from this study confirm that customers’ pleasure emotions influence their satisfaction with b&b websites and their behavioral intentions.

Originality/value
This paper incorporates the roles of experiential factors of e-servicescape in the context of the b&b industry.
Analyzing Twitter to explore perceptions of Asian restaurants
Authors: Park Seunghyun Brian , Jang Jichul , Ok Chihyung Michael 
Published: November 2016

Purpose
The purpose of this paper is to use Twitter analysis to explore diner perceptions of four types of Asian restaurants (Chinese, Japanese, Korean and Thai).

Design/methodology/approach
Using 86,015 tweets referring to Asian restaurants, this research used text mining and sentiment analysis to find meaningful patterns, popular words and emotional states in opinions.

Findings
Twitter users held mingled perceptions of different types of Asian restaurants. Sentiment analysis and ANOVA showed that the average sentiment scores for Chinese restaurants was significantly lower than the other three Asian restaurants. While most positive tweets referred to food quality, many negative tweets suggested problems associated with service quality or food culture.

Research limitations/implications
This research provides a methodology that future researchers can use in applying social media analytics to explore major issues and extract sentiment information from text messages.

Originality/value
Limited research has been conducted applying social media analysis in hospitality research. This study fills a gap by using social media analytics with Twitter data to examine the Twitter users’ thoughts and emotions for four different types of Asian restaurants.