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Fluid Dynamics & Materials Processing 2023年第3期19卷 663-677页

作者： Tahir Naseem Iqra Bibi azeem shahzad Mohammad Munir Department of Mathematics Government Postgraduate College Haripur22620Pakistan Basic Sciences Department University of Engineering and TechnologyTaxila47050Pakistan Department of Mathematics Government Postgraduate CollegeAbbottabad22010Pakistan

Heat transfer in an Eyring-Powell fluid that conducts electricity and flows past an exponentially growing sheet is *** the sheet is stretched in the x direction,the flow develops in the region with y>*** problem is tackled through a set of partial differential equations accounting for Magnetohydrodynamics(MHD),radiation and Joule heating effects,which are converted into a set of equivalent ordinary differential equations through a similarity *** converted problem is solved in MATLAB in the framework a fourth order accurate integration *** is found that the thermal relaxation period is inversely proportional to the thickness of the thermal boundary layer,whereas the Eckert-number displays the opposite *** this characteristic number grows,the temperature within the channel increases.

关键词： Stretched flow powell-eyring model heat flux model radiated effect relaxation phenomenon numerical study

On the Exact Solution for Axisymmetric Flow and Heat Transfer over a Nonlinear Radially Stretching Sheet

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Chinese Physics Letters 2012年第8期29卷 168-171页

作者： azeem shahzad Ramzan Ali Masood Khan Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan

We investigate the boundary-layer flow and heat transfer of a magnetohydrodynamic viscous fluid over a nonlinear radially porous stretching sheet within a porous *** flow is generated due to a nonlinear stretching sheet and influenced by a continuous suction/blowing of the fluid through the porous *** governing momentum and thermal boundary layer equations are converted into ordinary differential equations by appropriate similarity *** exact solution for the velocity and the temperature fields are derived in the form of an incomplete Gamma *** analytic solutions are found by the homotopy analysis *** graphical results for velocity and temperature fields are presented and ***,the numerical values of the skin friction coefficient and the Nusselt number are calculated and discussed.

关键词： function stretching porous

Analytical Solution for Time-dependent Flow of a Third Grade Fluid Induced Due to Impulsive Motion of a Flat Porous Plate

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Acta Mathematicae Applicatae Sinica 2015年第3期31卷 757-766页

作者： Taha Aziz F.M.Mahomed azeem shahzad Asim Aziz School of Computational and Applied Mathematics DST-NRF Centre of Excellence in Mathematical and Statistical Sciences Differential Equations Continuum Mechanics and Applications University of the Witwatersrand School of Natural Sciences National University of Sciences and Technology Department of Mathematics Quaid-i-Azam University Department of Basic Sciences and Humanities National University of Sciences and Technology College of Electrical and Mechanical Engineering

The aim of the present communication is to discuss the analytical solution for the unsteady flow of a third grade fluid which occupies the space y 〉 0 over an infinite porous plate. The flow is generated due to the motion of the plate in its own plane with an impulsive velocity V（t）. Translational symmetries in variables t and y are utilized to reduce the governing non-linear partial differential equation into an ordinary differential equation. The reduced problem is then solved using homotopy analysis method（HAM）. Graphs representing the solution are plotted and discussed and proper conclusions are drawn.

关键词： third grade fluid Porous plate translational symmetries Homotopy analysis method(HAM)

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2D Carbon Fiber Reinforced High Density Polyethylene Multi-Layered Laminated Composite Panels:Structural,Mechanical,Thermal,and Morphological Profile

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Journal of Materials Science & Technology 2016年第10期32卷 1077-1082页

作者： shahzad Maqsood Khan Nafisa Gull Muhammad azeem Munawar Atif Islam Saba Zia Muhammad Shafiq Aneela Sabir Syed Muhammad Awais Muhammad Arif Butt Muhammad Taqi Zahid Butt Tahir Jamil Department of Polymer Engineering and Technology University of the PunjabLahore 54590Pakistan King Edward Medical University Lahore 54590Pakistan College of Engineering and Emerging Technologies University of the PunjabLahore 54590Pakistan

Carbon fiber reinforced high density polyethylene multi-layered laminated composite panels（HDPE/CF MLCP） with excellent in-plane properties along transverse direction have been formulated. Composite architectures with carbon fiber（CF） designed in 2D layout in conventional composites can alleviate their properties in thickness direction, but all attempts so far developed have achieved restrained success. Here,we have exposed an approach to the high strength composite challenge, without altering the 2D stack design on the basis of concept of fiber reinforced laminated composites that would provide enhanced mechanical and thermal properties along transverse direction. CF sheets allowed the buckling of adjoining plies in 2D MLCP. We fabricated 2D MLCP by stacking the alternative CF and HDPE layers under different loading conditions, which resulted in high strength composites. These plies of CF and HDPE served as unit cells for MLCP, with CF offering much-needed fracture toughness and hardness to these *** 2D HDPE/CF MLCP, we demonstrated noteworthy improvement in physical and chemical interaction between CF and HDPE, in-plane fracture strain, flexural strength（30.684 MPa）, bending modulus（7436.254 MPa）, thermal stability（40.94%）, and surface morphology, upon increasing the CF layers up to twenty, enabling these composites truly for high temperature and high strength applications.

关键词： Multi-layered composite panels Mechanical properties Thermal stability

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A discussion on cotton transformation during the last decade (2010–2021);an update on present trends and future prospects

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Journal of Cotton Research 2021年第4期4卷 372-385页

作者： QANDEEL‑E‑ARSH AZHAR Muhammad Tehseen ATIF Rana Muhammad ISRAR Mahwish KHAN azeem Iqbal KHALID shahzad RANA Iqrar Ahmad Centre of Agricultural Biochemistry and Biotechnology(CABB) University of AgricultureFaisalabad 38000Pakistan Institute of Molecular Biology and Biotechnology Bahauddin Zakariya UniversityMultan 66000Pakistan School of Agriculture Sciences Zhengzhou UniversityZhengzhou 450000China Department of Plant Breeding and Genetics University of AgricultureFaisalabad 38000Pakistan Center of Advanced Studies in Agriculture and Food Security University of AgricultureFaisalabad 38000Pakistan Punjab Forestry Research Institute GutwalaFaisalabadPakistan Social Security Hospital FaisalabadPakistan

The introduction of genetically modified(GM)cotton in 1996 in the US and its worldwide spread later rejuvenated cotton production in many parts of the *** evolution is continued since then and currently,the 3rd and fourth generation of same GM cotton is grown in many parts of the *** GM cotton introduced in 1996 was simple Bt cotton that expressed a single Cry1Ac gene,the later generation carried multiple Cry genes along with the genes controlling herbicide *** day GM cotton does not only give stable resistance against lepidopteran insects but also facilitates the farmers to spray broad-spectrum herbicides without harming the *** evolution of GM cotton is continued both on the basic and applied side and interventions have been introduced during the last *** the cotton transformation was limited to Cocker strains which are getting possible in many other varieties,*** is successful with both gene gun,and Agrobacterium and inplanta transformation has made it a routine *** from overexpression studies for various purposes including biotic,abiotic,and quality traits,RNAi and genome editing are explored *** this review,we have tried to explore and discuss various interventions for improving transformation protocols,the applications of cotton transformation,and future strategies being developed to get maximum benefits from this technology during the last decade.

关键词： Cotton transformation Overexpression Genome editing Sustainable agriculture RNAi

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Investigation of functional,physical,mechanical and thermal properties of TiO2 embedded polyester hybrid composites:A design of experiment(DoE)study

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Progress in Natural Science:Materials International 2018年第3期28卷 266-274页

作者： Muhammad azeem Munawar Dirk Wolfram Schubert shahzad Maqsood Khan Muhammad Atiq Ur Rehman Nafisa Gulld Atif Islam Aneela Sabir Muhammad Shafiq Bilal Haider Mudassar Azam Saba Urooge Khan Monika M.Voigt Institute of Polymer Materials Friedrich-Alexander-University Department of Polymer Engineering and Technology University of the Punjab Bavarian Polymer Institute Institute of Biomaterials Friedrich-Alexander-University Institute of Chemical Engineering and Technology University of the Punjab

This paper presents a study on the Design of Experiments(Do E) approach to optimize the fabrication parameters of titania(TiO2) embedded glass fiber reinforced polyester hybrid composites(HCs). HCs of unsaturated polyester resin(UPR) were fabricated using methyl ethyl ketone peroxide(MEKP) as the curing agent by hand lay-up process(HLUP) and compression molding technique(CMT). The fabrication parameters were optimized by Taguchi Do E(an orthogonal array of L25) using 3 control factors(concentration of TiO2, concentration of MEKP and curing temperature) having 5 levels each. Statistical tools were employed to identify significant factors affecting tensile strengths and its reproducibility during HLUP. It was found that the concentration of TiO2in HCs significantly influenced the tensile strength(TS) followed by MEKP concentration and curing temperature. The highest value of TS was obtained at 3 wt% TiO2, 2 wt% MEKP and 80 °C. Nevertheless, the sensitivity of TiO2concentration was basis for fabrication of polyester titania glass fiber hybrids(PTGFHs), which were further investigated for density and void fractions, linear shrinkage, flexural strength, impact strength, hardness and thermal behaviors. Moreover, cross-linking and hydrogen-bonding between polymeric chains, styrene, silica content of glass fiber and TiO2particles in PTGFHs were confirmed by Fourier transform infrared spectroscopy.

关键词： Hybrid composites Polyester Design of experiment Titania