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71.
Numerical Study of Heat and Mass Transfer MHD Viscous Flow Over a Moving Wedge in the Presence of Viscous Dissipation and Heat Source/Sink with Convective Boundary Condition
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In this article, the effects of viscous dissipation and internal heat generation/absorption on combined heat and mass transfer MHD viscous fluid flow over a moving wedge in the presence of mass suction/injection with the convective boundary condition are carried out numerically for the various values of dimensionless parameters. With the help of similarity transformation, the momentum, energy, and concentration equations are reduced to a set of dimensionless non‐linear ordinary differential equations. The significance of the dimensionless velocity, temperature, mass profiles, and their gradients are presented in graphical form. Three types of flows—particularly the flat plate, vertical wedge, and stagnation point flows—in favorable and unfavorable regimes are analyzed. The obtained results confirm that the flow field is substantially influenced by the magnetic, stretching/shrinking, pressure, Prandtl number, heat generation/dissipation, and mass suction/injection parameters. Current results indicate that stretching a wall boundary causes an increase in velocity, temperature, shear stress, temperature, and mass gradients while shrinking causes a decreasing trend with these profiles. The special modified form of the current problem is found to be in good agreement with the other published data. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res, 43(1): 17–38, 2014; Published online in Wiley Online Library ( wileyonlinelibrary.com/journal/htj ). DOI 10.1002/htj.21063 相似文献
72.
Zaheer Saad Malik Asad Waqar Rahman Anis Ur Khan Safdar Abbas 《The Journal of supercomputing》2019,75(11):7723-7745
The Journal of Supercomputing - Cloud is a multi-tenant paradigm providing resources as a service. With its easily available computing infrastructure, researchers are adopting cloud for... 相似文献
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In a mining complex, the mine is a source of supply of valuable material (ore) to a number of processes that convert the raw ore to a saleable product or a metal concentrate for production of the refined metal. In this context, expected variation in metal content throughout the extent of the orebody defines the inherent uncertainty in the supply of ore, which impacts the subsequent ore and metal production targets. Traditional optimization methods for designing production phases and ultimate pit limit of an open pit mine not only ignore the uncertainty in metal content, but, in addition, commonly assume that the mine delivers ore to a single processing facility. A stochastic network flow approach is proposed that jointly integrates uncertainty in supply of ore and multiple ore destinations into the development of production phase design and ultimate pit limit. An application at a copper mine demonstrates the intricacies of the new approach. The case study shows a 14% higher discounted cash flow when compared to the traditional approach. 相似文献
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Waqar Ali Salah Ud Din Abdullah Aman Khan Saifullah Tumrani Xiaochen Wang Jie Shao 《计算机、材料和连续体(英文)》2020,63(2):1065-1078
Recommender systems are rapidly transforming the digital world into
intelligent information hubs. The valuable context information associated with the users’
prior transactions has played a vital role in determining the user preferences for items or
rating prediction. It has been a hot research topic in collaborative filtering-based
recommender systems for the last two decades. This paper presents a novel Context
Based Rating Prediction (CBRP) model with a unique similarity scoring estimation
method. The proposed algorithm computes a context score for each candidate user to
construct a similarity pool for the given subject user-item pair and intuitively choose the
highly influential users to forecast the item ratings. The context scoring strategy has an
inherent capability to incorporate multiple conditional factors to filter down the most
relevant recommendations. Compared with traditional similarity estimation methods,
CBRP makes it possible for the full use of neighboring collaborators’ choice on various
conditions. We conduct experiments on three publicly available datasets to evaluate our
proposed method with random user-item pairs and got considerable improvement in
prediction accuracy over the standard evaluation measures. Also, we evaluate prediction
accuracy for every user-item pair in the system and the results show that our proposed
framework has outperformed existing methods. 相似文献
77.
Jeong Ho Hwang Ju Hwa Lee Ahmad Hafiz Waqar Dong Ho Bae Kyunghoon Kim 《Journal of Mechanical Science and Technology》2018,32(11):5147-5153
This paper studies the prediction of fatigue and corrosion fatigue lives using neural network and accelerated life methods for dissimilar material weld between Alloy617 and 12Cr steel. First, dissimilar material welding between Alloy617 and 12Cr steel was performed using buttering technology. The fatigue and corrosion fatigue strengths, and electrochemical corrosion susceptibility of dissimilar material weld were assessed. After that, on the basis of obtained data, fatigue life and corrosion fatigue life of dissimilar material weld were predicted using the neural network and accelerated life test methods. The predicted results showed good agreement with the actual fatigue and corrosion fatigue lives. Especially, the results of the neural network prediction were more accurate than those of the accelerated life method. 相似文献
78.
Syed Waqar Haider Karim Chatti Neeraj Buch Richard W. Lyles Aswani S. Pulipaka Dennis Gilliland 《Canadian Metallurgical Quarterly》2007,21(4):283-292
Results are presented from a study to evaluate the relative influence of design and site factors on the performance of in-service flexible pavements. The data are from the SPS-1 experiment of the Long-Term Pavement Performance program. This experiment was designed to investigate the effects of HMA surface layer thickness, base type, base thickness, and drainage on the performance of new flexible pavements constructed in different site conditions (subgrade type and climate). Base type was found to be the most critical design factor affecting fatigue cracking, roughness (IRI), and longitudinal cracking (wheel path). The best performance was shown by pavement sections with asphalt treated bases (ATB). This effect should be interpreted in light of the fact that an ATB effectively means a thicker HMA layer. Drainage and base type, when combined, also play an important role in improving performance, especially in terms of fatigue and longitudinal cracking. Base thickness has only secondary effects on performance, mainly in the case of roughness and rutting. In addition, climatic conditions were found to have a significant effect on flexible pavement performance. Wheel path longitudinal cracking and transverse cracking seem to be associated with a wet-freeze environment, while nonwheel path longitudinal cracking seems to be dominant in a freeze climate. In general, pavements built on fine-grained soils have shown the worst performance, especially in terms of roughness. Although most of the findings from this study support the existing understanding of pavement performance, they also provide an overview of the interactions between design and site factors and new insights for achieving better long-term pavement performance. 相似文献
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Syed Wasim Ali Farhat Waqar Muhammad Arif Malik Tariq Yasin Bashir Muhammad 《应用聚合物科学杂志》2013,129(4):2234-2243
Macroporus ethylacrylate‐divinylbenzene copolymers were synthesized by suspension polymerization using diethyl phthalate and n‐heptane as diluent. A hydrolysis study revealed that conversion of esters into carboxylic acid groups was dependent on three factors: (1) crosslinkage: increases with a decrease in crosslinkage, (2) reagent: sulfuric acid>aqueous NaOH>NaOH in a 1 : 1 water to ethylene glycol, and (3) pore volume (PV): highest when PV was ~ 0.7 mL g?1. Sulfuric acid hydrolyzed ester to ? COOH and introduced ? SO3H on phenyl rings, thus producing a bi‐functional resin. The functional groups were verified by IR spectroscopy and quantified by acid–base titration. The bi‐functional resin's capacity for toxic heavy metals in water samples was 12.51, 10.43, 9.43, 13.21, and 11.12 mg g?1 for Cu, Cd, Ni, Pb, and Zn, respectively and the recoveries exceeded >95% in range of pH 2–8, showing that it is suitable for water purification. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 相似文献