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Computational Fluid Dynamic Simulation of Liquid-Liquid Mixing in a Static Double-T-shaped Micromixer

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过程工程学报 2008年第6期8卷 1080-1084页

作者： Elmabruk.A. mansur 王运东戴猷元 The State k.y Lab. Chem. Eng. Dept. Chem. Eng.Tsinghua University

The laminar flow structure and mixing performance of T-shaped and double-T-shaped micromixers with rectangular cross-section have been investigated using computational fluid dynamic (CFD) simulation. FLUENT software is used to evaluate the mixing efficiency. The numerical simulation results show that the presented double-T-micromixer is highly efficient over T-shaped micromixer. The performance of double-T-micromixer with and without static mixing elements (SME) is also investigated. The enhancement in mixing performance is thought to be caused by the generation of eddies and lateral velocity component when the mixture flows through these elements. Mixing efficiency as higher as 97% is reached within a mixing length of 320 μm downstream from the first T-junction with the enhancement of three SMEs.

关键词：计算方法流体动力学模拟方法液液混合双T形微混合器物理过程

A Minimizing Property of Homographic Solutions

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Acta Mathematica Sinica,English Series 2014年第2期30卷 353-360页

作者： Abdalla M.mansur Daniel C.OFFIN Department of Mathematics and Statistics Queen’s University

In this paper, we prove that the homographic solutions to the rhombus four body prob- lem are the variational minimizers of the Lagrangian action restricted on a holonomically constrained rhombus loop space.

关键词： Nbody problems holonomic systems action functional

Flow and heat transfer of nanofluid past stretching/shrink.ng sheet with partial slip boundary conditions

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Applied Mathematics and Mechanics(English Edition) 2014年第11期35卷 1401-1410页

作者： S.mansur A.ISHAk.I.POP Department of Mathematics and Statistics Faculty of Science Technology and Human Development Universiti Tun Hussein Onn Malaysia Centre of Modelling and Data Analysis School of Mathematical Sciences Faculty of Science and Technology Universiti Kebangsaan Malaysia Department of Mathematics Babes-Bolyai University

The boundary layer flow of a nanofluid past a stretching/shrink.ng sheet with hydrodynamic and thermal slip boundary conditions is studied. Numerical solutions to the governing equations are obtained using a shooting method. The results are found for the sk.n friction coefficient, the local Nusselt number, and the local Sherwood number as well as the velocity, temperature, and concentration profiles for some values of the velocity slip parameter, thermal slip parameter, stretching/shrink.ng parameter, thermophoresis parameter, and Brownian motion parameter. The results show that the local Nusselt number, which represents the heat transfer rate, is lower for higher values of thermal slip parameter, thermophoresis parameter, and Brownian motion parameter.

关键词： boundary layer heat transfer nanofluid stretching/shrink.ng dual solution

Quo vadis? Bioengineered polysaccharide-based hydrogel scaffolds for damaged central nervous system recovery and regeneration

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Neural Regeneration Research 2022年第7期17卷 1478-1480页

作者： Isadora C.Carvalho Herman S.mansur Center of Nanoscience Nanotechnology and Innovation-CeNano2IDepartment of Metallurgical and Materials EngineeringFederal University of Minas GeraisBelo HorizonteMGBrazil

Impairments in the central nervous system(CNS)are a prevalent cause of life-long disabilities worldwide,representing serious health,social,and economic concerns(Doblado et al.,2021).During the last decades,with the population eldering and the increase in the life span,we have experienced an increase in CNS-related disorders,lik. strok. and neurodegenerative diseases(Jarrin et al.,2021).

关键词： al. diseases system

PET-modified red mud as catalysts for oxidative desulfurization reactions

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Journal of Environmental Sciences 2017年第7期29卷 312-320页

作者： Nayara T.do Prado Ana P.Heitmann Herman S.mansur Alexandra A.mansur Luiz C.A.Oliveira Cinthia S.de Castro Department of Chemistry Federal University of Minas GeraisAv.Antonio Carlos 6627Campus Pampulha31270-901BH-MGBrazil Department of Metallurgical and Materials Engineering Au.Antonio Carlos 6627Campus Pampulha31270-901BH-MGBrazil

This work.describes the synthesis of catalysts based on red mud/polyethylene terephthalate（PET） composites and their subsequent heat treatment under N2 *** materials were characterized by scanning electron microscopy（SEM）,temperature programmed reduction（TPR）,Fourier transform infrared spectroscopy（FT–IR）,X-ray diffraction（XRD）,thermogravimetric（TG） analysis and N2adsorption/*** catalysts were evaluated in the oxidative desulfurization reaction of dibenzothiophene（DBT） in a biphasic *** results indicated that the PET impregnation on red mud increased the affinity of the catalyst with the nonpolar phase（fuel）,in which the contaminant was dissolved,allowing a higher conversion（up to 80%） and selectivity to the corresponding dibenzothiophene *** sulfone compound is more polar than DBT and diffused into the polar solvent as indicated by the data obtained via gas chromatography–mass spectrometry（GC–MS）.

关键词： Red mud PET Dibenzothiophene Desulfurization Dibenzothiophene sulfone

Acute fractures of the pediatric foot and ank.e

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World Journal of Pediatrics 2015年第1期11卷 14-20页

作者： mansur Halai Bilal Jamal Paul Rea Mobeen Qureshi Anand Pillai Department of Trauma and Orthopedics University Hospitials of South ManchesterManchester M239LTUK

Back.round:Injuries around the foot and ank.e are *** is a paucity of literature,outside that of specialist orthopedic journals,that focuses on this subject in the pediatric *** sources:In this review,we outline pediatric foot and ank.e fractures in an anatomically oriented manner from the current *** aim is to aid the emergency department doctor to manage these challenging injuries more efectively in the acute ***:These injuries require a detailed history and examination to aid the ***,plain radiographs are suficient,but more complex injuries require the use of magnetic resonance *** is dependent on the proximity to sk.letal maturity and the degree of displacement of *** have a mark.d ability to remodel after fractures and therefore mainstay treatment is immobilization by a cast or *** fxation,although uncommon in this population,may be necessary with adolescents,certain unstable injuries or in cases with displaced articular *** the setting of severe foot trauma,sk.n compromise and compartment syndrome of the foot must be ***:The integrity of the physis,articular surface and soft tissues are all equally important in treating these injuries.

关键词： ank.e foot fractures

Performance of Compact Radial Basis Functions in the Direct Interpolation Boundary Element Method for Solving Potential Problems

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Computer Modeling in Engineering & Sciences 2017年第3期113卷 367-387页

作者： C.F.Loeffle L.Zamprogno W.J.mansur A.Bulcao DEM/PPGEM Federal University of Espírito Santo PGSU Petrobras PEC/LAMEMO/COPPE/Federal University of Rio de Janeiro CENPES Petrobras

This study evaluates the effectiveness of a new technique that transforms doma in integrals into boundary integrals that is applicable to the boundary element *** mulations were conducted in which two-dimensional surfaces were approximated by inter polation using radial basis functions with full and compact *** involving Poisson’s equation are presented using the boundary element method and the proposed te chnique with compact radial basis *** advantages and the disadvantages are e xamined through *** effects of internal poles,the boundary mesh refinemen t and the value for the support of the radial basis functions on performance are assessed.

关键词： Interpolations radial basis functions boundary element method Poisson’s equation

Synthesis and Characterisation of Colorants Derived from 1,4-Diamino Anthraquinone Polyamides

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Advances in Chemical Engineering and Science 2012年第2期2卷 300-308页

作者： Mohammed k.bir Yak.bu mohammad Sani Gumel mansur Bala Ibrahim Rak.sh k.mar Centre for Scientific and Industrial Research (CSIR) Materials Science and Manufacturing Port Elizabeth South Africa Department of Pure and Industrial Chemistry Bayero University Kano Nigeria Department of Textile Science and Technology Ahmadu Bello University Zaria Nigeria

In this study, the polycondensation products of a diamine anthraquinone (1,4-diamino anthraquinone) and some aliphatic diacids with different methylene numbers were synthesised. Their UV-visible spectroscopy and thermal properties were then characterised. The synthesis was achieved by reacting equimolar solutions of the amine and the acid halides. The structure and thermal properties of the products were characterised. FT-IR Spectra of all the three products revealed the formation of amide due to the presence of strong bands at 1565 and 3390 cm?1 assignable to C=O stretching and N-H vibrations. Differential Scanning Calorimetry revealed high melting exotherms for the products. Thermogravimetry revealed moderate thermal stabilities for Poly NAM and Poly NAS and low thermal stability for Poly NAA which indicated 5.9%, 7.1% and 61.2% weight losses at 285℃, 285℃ and 374℃ for the three products respectively. The wavelengths of maximum absorbance for the dye samples are 601.5, 591 and 589 nm respectively with absorptivity coefficients (a1cm1% ) of 11640000, 11610000 and 11560000 respectively.

关键词： Anthraquinone Polymeric Dyes Polyamide Synthesis Characterisation

EDCMS:A Content Management System for Engineering Documents

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International Journal of Automation and computing 2007年第1期4卷 56-70页

作者： Chris McMahon mansur Darlington Steve Culley Peter Wild Department of Mechanical Engineering University of BathClaverton DownBath BA2 7AYUK

Engineers often need to look.for the right pieces of information by sifting through long engineering documents, It is a very tiring and time-consuming job. To address this issue, researchers are increasingly devoting their attention to new ways to help information users, including engineers, to access and retrieve document content. The research reported in this paper explores how to use the k.y technologies of document decomposition （study of document structure）, document mark.up （with EXtensible Mark. up Language （XML）, HyperText Mark.up Language （HTML）, and Scalable Vector Graphics （SVG））, and a facetted classification mechanism. Document content extraction is implemented via computer programming （with Java）. An Engineering Document Content Management System （EDCMS） developed in this research demonstrates that as information providers we can mak. document content in a more accessible manner for information users including engineers.The main features of the EDCMS system are： 1） EDCMS is a system that enables users, especially engineers, to access and retrieve information at content rather than document level. In other words, it provides the right pieces of information that answer specific questions so that engineers don＇t need to waste time sifting through the whole document to obtain the required piece of information. 2） Users can use the EDCMS via both the data and metadata of a document to access engineering document content. 3） Users can use the EDCMS to access and retrieve content objects, i.e. text, images and graphics （including engineering drawings） via multiple views and at different granularities based on decomposition schemes. Experiments with the EDCMS have been conducted on semi-structured documents, a textbook.of CADCAM, and a set of project posters in the Engineering Design domain. Experimental results show that the system provides information users with a powerful solution to access document content.

关键词： Document content management engineering design decomposition schemes document mark.up facetted classification.