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Article

Muhammad Waqas, Muhammad Mudassar Gulzar, Zeeshan Asghar, Z. Ali, Waqar Azeem Khan and Abdul Sattar Dogonchi

The purpose of this study is to elaborate mixed convection impact in stratified nanofluid flow by convectively heated moving surface. Rheological relations of second-grade…

Abstract

Purpose

The purpose of this study is to elaborate mixed convection impact in stratified nanofluid flow by convectively heated moving surface. Rheological relations of second-grade fluid are used for formulation. Magnetic field, heat absorption/generation and convective conditions are considered for modeling.

Design/methodology/approach

Convergent solutions are achieved using homotopy procedure.

Findings

The authors found opposing behavior for radiation and thermal stratification variables against thermal field.

Originality/value

No such analysis has yet been reported.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 29 no. 8
Type: Research Article
ISSN: 0961-5539

Keywords

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Article

Muhammad Waqas, M. Mudassar Gulzar, Waqar Azeem Khan, Muhammad Ijaz Khan and Niaz B. Khan

This paper aims to elaborate the characteristics of magneto-Maxwell nanoliquid toward moving radiated surface. Flow analysis subject to Darcy–Forchheimer concept is…

Abstract

Purpose

This paper aims to elaborate the characteristics of magneto-Maxwell nanoliquid toward moving radiated surface. Flow analysis subject to Darcy–Forchheimer concept is studied. Newtonian heat/mass conditions and heat source aspects are taken into account for modeling. Apposite transformations are introduced for non-dimensionalization process.

Design/methodology/approach

Optimal homotopy analysis method is implemented to compute convergent solutions of nonlinear ordinary differential equations.

Findings

Temperature field increments when thermophoresis, heat generation and Brownian movement parameters are increased, whereas reverse situation is noticed for larger Prandtl number. The results also witness that concentration distribution has opposite characteristics for larger thermophoresis and Brownian movement parameters. Furthermore, the presented analysis reduces to traditional Darcy relation in the absence of local inertia coefficient.

Originality/value

As per the authors’ knowledge, no such analysis has been yet reported.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 29 no. 8
Type: Research Article
ISSN: 0961-5539

Keywords

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Article

Muhammad Aamir, Izhar , Muhammad Waqas, Muhammad Iqbal, Muhammad Imran Hanif and Riaz Muhammad

This paper aims to develop a fuzzy logic-based algorithm to predict the intermetallic compound (IMC) size and mechanical properties of soldering material…

Abstract

Purpose

This paper aims to develop a fuzzy logic-based algorithm to predict the intermetallic compound (IMC) size and mechanical properties of soldering material, Sn96.5-Ag3.0-Cu0.5 (SAC305) alloy, at different levels of temperature. The reliability of solder joint in materials selection is critical in terms of temperature, mechanical properties and environmental aspects. Owing to a wide range of soldering materials available, the selection space finds a fuzzy characteristic.

Design/methodology/approach

The developed algorithm takes thermal aging temperature for SAC305 alloy as input and converts it into fuzzy domain. These fuzzified values are then subjected to a fuzzy rule base, where a set of rules determines the IMC size and mechanical properties, such as yield strength (YS) and ultimate tensile strength (UTS) of SAC305 alloy. The algorithm is successfully simulated for various input thermal aging temperatures. To analyze and validate the developed algorithm, an SAC305 lead (Pb)-free solder alloy is developed and thermally aged at 40, 60 and 100°C temperature.

Findings

The experimental results indicate an average IMCs size of 5.967 (in Pixels), 19.850 N/mm2 YS and 22.740 N/mm2 UTS for SAC305 alloy when thermally aged at an elevated temperature of 140°C. In comparison, the simulation results predicted 5.895 (in Pixels) average IMCs size, 19.875 N/mm2 YS and 22.480 N/mm2 UTS for SAC305 alloy at 140°C thermally aged temperature.

Originality/value

From the experimental and simulated results, it is evident that the fuzzy-based developed algorithm can be used effectively to predict the IMCs size and mechanical properties of SAC305 at various aging temperatures, for the first time.

Details

Soldering & Surface Mount Technology, vol. 29 no. 4
Type: Research Article
ISSN: 0954-0911

Keywords

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Article

Muhammad Ibrahim Abdullah, Dechun Huang, Muddassar Sarfraz, Junaid Naseer and Muhammad Waqas Sadiq

Organizations are facing several challenges in the current challenging business environment. The current study explores how counterproductive work behavior (CWB) affects…

Abstract

Purpose

Organizations are facing several challenges in the current challenging business environment. The current study explores how counterproductive work behavior (CWB) affects bio-medical companies' firm performance in Pakistan. The study considers the mediating role of organizational culture and its impact on CWB and a firm's performance.

Design/methodology/approach

Data were collected through a self-administered questionnaire. For data collection, 300 questionnaires were distributed among employees working in biomedical companies. Statistical analysis such as descriptive statistics, Pearson moment correlation and structural equation modeling (SEM) techniques was used to analyze the study variable's relationship and its effect on the firm's performance.

Findings

The study results revealed that CWB and organizational culture significantly influence firm performance directly and indirectly. Moreover, organizational culture partially mediates the relationship between CWB and companies' performance.

Originality/value

The current study plays a significant role in the firm's policy directions. There are limited research and information accessible to biomedical firms in Pakistan. Counterproductive job habits wind up becoming something that significantly affects the firm performance. This research adds to human resource management, corporate management and the business strategy literature.

Details

Business Process Management Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1463-7154

Keywords

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Article

Muhammad Waqas, Ubaid Ahmed Nisar, Muhammad Ijaz Khan and Sabir Ali Shehzad

The purpose of this paper is to address the impact of gravity induced stretching flow of second grade liquid subject to thermal radiation. The flow is generated by the…

Abstract

Purpose

The purpose of this paper is to address the impact of gravity induced stretching flow of second grade liquid subject to thermal radiation. The flow is generated by the stretching of an impermeable cylinder. Stagnation point flow is considered. Convective type boundary conditions are applied on temperature and concentration. The present investigation further includes the aspects of magnetohydrodynamics, Joule heating, chemical reaction and viscous dissipation and heat generation/absorption.

Design/methodology/approach

The ordinary differential expressions are formed using suitable similarity transformations from the governing partial differential expressions. The subsequent nonlinear ordinary differential expressions are solved analytically using homotopy concept to report the consequences of different dimensionless physical parameters in graphical and tabular forms.

Findings

The results witnessed that increasing values of curvature parameter corresponds to higher temperature and concentration. Besides this, the impacts of destructive and constructive chemical processes on the concentration distribution are noted opposite.

Originality/

No such analysis has yet been reported.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 4
Type: Research Article
ISSN: 0961-5539

Keywords

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Article

Muhammad Ijaz Khan, Sohail Ahmad Khan, Tasawar Hayat, Muhammad Waqas and Ahmed Alsaedi

The purpose of this paper is to investigate the entropy optimization in magnetohydrodynamic hybrid nanomaterials flows toward a stretchable surface. The energy expression…

Abstract

Purpose

The purpose of this paper is to investigate the entropy optimization in magnetohydrodynamic hybrid nanomaterials flows toward a stretchable surface. The energy expression is modeled subject to dissipation, heat generation/absorption and Joule heating. Here silicon dioxide (SiO2) and molybdenum disulfide (MoS2) as nanoparticles and propylene glycol (C3H8O2) as base fluid, respectively. Furthermore, the authors discussed the comparative study of molybdenum disulfide and silicon dioxide diluted in propylene glycol. The total entropy optimization rate is computed through implementation of the second law of thermodynamics.

Design/methodology/approach

The nonlinear partial differential system is reduced to an ordinary one through implementation of transformation. Newton built-in shooting method is used for computational results for the given system. Influences of various flow variables on the temperature, Bejan number, velocity, concentration and entropy generation rate are examined graphically for both nanoparticles (SiO2 and MoS2). Gradients of velocity and temperature are computed numerically for various physical parameters. Also, take the comparison between the present and previously published results in tabulated form.

Findings

For higher estimation of ϕ both temperature and velocity are enhanced. Entropy optimization and Bejan number have the opposite outcome for viscosity parameter. Temperature and velocity have opposite behaviors for larger values of magnetic parameter. Molybdenum disulfide (MoS2) is more efficient than silicon dioxide (SiO2).

Originality/value

No such work is yet published in the literature.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 22 no. 8
Type: Research Article
ISSN: 0961-5539

Keywords

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Article

Muhammad Waqas Khalid, Junaid Zahid, Muhammad Ahad, Aadil Hameed Shah and Fakhra Ashfaq

The purpose of this paper is to measure the unidimensional and multidimensional inequality in the case of Pakistan and compare their results at the provincial as well as…

Abstract

Purpose

The purpose of this paper is to measure the unidimensional and multidimensional inequality in the case of Pakistan and compare their results at the provincial as well as regional (urban and rural areas) level. The authors collected data from Pakistan Social and Living Standard Measurement and Household Integrated Economic Survey for fiscal years of 1998–1999 and 2013–2014.

Design/methodology/approach

The authors used Gini coefficient for unidimensional inequality and multidimensional indexing approach of Araar (2009) for multidimensional inequality.

Findings

The findings predicted that unidimensional inequality is relatively high in the urban area due to uneven dissemination of income, but multidimensional inequality is quite high in rural areas because of higher disparities among all dimensions. At the provincial level, Punjab has relatively high-income inequality followed by Sindh, KPK and Baluchistan.

Originality/value

This study is a pioneering effort to compare two time periods to explore unidimensional and multidimensional inequality in all provinces of Pakistan and their representative rural-urban regions by applying Araar and Duclos’s (2009) approach. Further, this study opens some new insights for policy makers.

Details

International Journal of Social Economics, vol. 46 no. 2
Type: Research Article
ISSN: 0306-8293

Keywords

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Article

Muhammad Waqas

Given the increased interest in the practical significance of the general attitude towards religious advertising, the purpose of this paper is to examine what influences…

Abstract

Purpose

Given the increased interest in the practical significance of the general attitude towards religious advertising, the purpose of this paper is to examine what influences consumers’ general attitude towards religious advertising in Malaysia.

Design/methodology/approach

An analytical research design was used to examine the impact of five factors (attitude towards the purpose/goal of the religious advertising [attitude institution], the quality of the message [attitude instrument], the information presented in the religious advertising about the product [product information], the social image associated with the advertised product [social image] and the hedonic pleasure owing to the advertisement of the product or service [hedonic pleasure]) on the general attitude towards religious advertising. Data were collected using an online survey (n = 210) and were analysed using structural equation modelling method.

Findings

The research found that the attitude towards the institution of advertising and the hedonic pleasure significantly influence the general attitude towards religious advertising. However, the quality of the advertisement, social image and product information were found to be insignificant predictors. Overall, this is a surprising result, where consumers place their trust in the reputation of the provider of the product or service and act based on the stimulus of good feeling the advertisement converse to them.

Originality/value

This paper fills the gap in the research, as there are very few studies done on religious advertising. This paper has presented ways to improve practices of religious advertising.

Details

Journal of Islamic Accounting and Business Research, vol. 12 no. 1
Type: Research Article
ISSN: 1759-0817

Keywords

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Article

Waqar Azeem Khan, Mehboob Ali, Muhammad Waqas, M. Shahzad, F. Sultan and M. Irfan

This paper aims to address the flow of Sisko nanofluid by an unsteady curved surface. Non-uniform heat source/sink is considered for heat transfer analysis.

Abstract

Purpose

This paper aims to address the flow of Sisko nanofluid by an unsteady curved surface. Non-uniform heat source/sink is considered for heat transfer analysis.

Design/methodology/approach

Numerical solutions are constructed using bvp4c procedure.

Findings

Pressure profile inside boundary region is increased when A and K are enhanced.

Originality/value

No such analysis is yet presented.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 29 no. 12
Type: Research Article
ISSN: 0961-5539

Keywords

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Article

Tasawar Hayat, Ikram Ullah, Muhammad Waqas and Ahmed Alsaedi

The purpose of this study is to study the impacts of exponential space-dependent heat source (ESHS) and thermal radiation in Marangoni convective flow of Cross fluid. The…

Abstract

Purpose

The purpose of this study is to study the impacts of exponential space-dependent heat source (ESHS) and thermal radiation in Marangoni convective flow of Cross fluid. The passively controlled model is developed to exhibit the nanoparticles’ concentration on the surface.

Design/methodology/approach

The resulting problem under consideration is tackled by using the shooting approach.

Findings

Temperature field augments with enhancement of the thermophoretic, exponential-based space heat source (ESHS) and radiation parameters, whereas it decays with the increase of the Marangoni ratio parameter.

Originality/value

To the best of the authors’ knowledge, no such analysis has yet been reported.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 29 no. 8
Type: Research Article
ISSN: 0961-5539

Keywords

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