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Nanofluid Flows Within Porous Enclosures Using Non-Linear Boussinesq Approximation

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Computers, Materials & Continua 2021年第3期66卷 3195-3213页

作者： Sameh E.Ahmed dalal Alrowaili Ehab Mahmoud Mohamed Abdelraheem M.Aly Department of Mathematics College of ScienceKing Khalid UniversityAbha62529Saudi Arabia Department of Mathematics South Valley UniversityQena83523Egypt Mathematics Department College of ScienceJouf UniversitySakakaSaudi Arabia Electrical Engineering Department College of EngineeringPrince Sattam Bin Abdulaziz UniversityWadi Addwasir11991Saudi Arabia Electrical Engineering Department Aswan UniversityAswan81542Egypt

In this paper,the Galerkin finite element method(FEM)together with the characteristic-based split(CBS)scheme are applied to study the case of the non-linear Boussinesq approximation within sinusoidal heating inclined enclosures filled with a non-Darcy porous media and *** enclosure has an inclination angle and its side-walls have varying sinusoidal temperature *** working fluid is a nanofluid that is consisting of water as a based nanofluid and Al2O3 as *** porous medium is modeled using the Brinkman Forchheimer extended Darcy *** obtained results are analyzed over wide ranges of the non-linear Boussinesq parameter 0≤ζ≤1,the phase deviation 00≤Φ≤1800,the inclination angle 00≤γ≤900,the nanoparticles volume fraction 0%≤φ≤4%,the amplitude ratio 0≤a≤1 and the Rayleigh number 104≤Ra≤*** results revealed that the average Nusselt number is enhanced by 0.73%,26.46%and 35.42%at Ra=104,105 and 106,respectively,when the non-linearBoussinesq parameter is varied from 0 to *** addition,rate of heat transfer in the case of a non-uniformly heating is higher than that of a uniformly ***-linear Boussinesq parameter rises the flow speed and heat transfer in an *** deviation makes clear changes on the isotherms and heat transfer rate on the right wall of an *** inclination angle varies the flow speed and it has a slight effect on heat transfer in an enclosure.

关键词： CBS scheme non-linear Boussinesq approximation nonuniformly heating non-darcy flow nanofluid

Cipaferoids A-C, Three Limonoids Represent Two Different Scaffolds from Cipadessa baccifera

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Chinese Journal of Chemistry 2018年第2期36卷 124-128页

作者： Jinhai Yu Bin Zhou Seema dalal qunfang Liu Maria B. Cassera Jianmin Yue State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China Department of Biochemistry and the Virginia Tech Center for Drug Discovery MC 0308 Virginia Polytechnic Institute and State University BlacksburgVirginia 24061 the United States. Current address: Department of Biochemis-try and Molecular Biology University of Georgia Athens GA 30602 the Unit-ed States

Three limonoids cipaferoids A-C （1-3） representing two different scaffolds were isolated from Cipadessa baccifera. Their structures were completely assigned by spectroscopic data, CD exciton chirality method, and X-ray crystallography. Compounds 2 and 3 exhibited moderate antimalarial activity with IC50 values of 9.3±0.1 and 14.7±4.8 μmol·L^-1, respectively.

关键词： cipaferoids Cipadessa baccifera limonoids structural elucidation antimalarial activity

Structurally Interesting Diarymethane Derivatives from Securidaca inappendiculata

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Chinese Journal of Chemistry 2020年第8期38卷 812-816页

作者： Bin Zhou Yan Wu Lishe Gan Seema dalal Maria B.Cassera Jianmin Yue State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences555 Zuchongzhi RoadShanghai 201203China College of Pharmaceutical Sciences Zhejiang UniversityHangzhouZhejiang 310058China Department of Biochemistry MC 0308Virginia TechBlacksburgVirginia 24061United States Department of Biochemistry and Molecular Biology and Center for Tropical and Emerging Global Diseases(CTEGD)University of GeorgiaAthensGeorgia 30602United States

Securines A—E,three dimeric diarymethane derivatives(1-3)and two enantiomeric diarymethane derivative monomers(4 and 5),were isolated and characterized from the medicinal plant Securidaca *** 1 and 2 are a pair of enantiomeric diarymethane derivative dimers,and compound 3 is a mesomeric diarymethane derivative *** structures were determined by a combination of spectroscopic data,X-ray crystallography,electronic circular dichroism(ECD)analysis,and computational ECD *** compounds 1-3 showed moderate antiplasmodial activities with IC50 values of 0.9,1.4,and 1.5μM,respectively.

关键词： methane derivative circular

Design of Computer Methods for the Solution of Cervical Cancer Epidemic Model

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Computers, Materials & Continua 2022年第1期70卷 1649-1666页

作者： Ali Raza Muhammad Rafiq dalal Alrowaili Nauman Ahmed Ilyas Khan Kottakkaran Sooppy Nisar Muhammad Mohsin Department of Mathematics National College of Business Administration and Economics LahorePakistan Department of Mathematics Faculty of SciencesUniversity of Central PunjabLahore54500Pakistan Mathematics Department College of ScienceJouf UniversityP.O.Box:2014SakakaSaudi Arabia Department of Mathematics and Statistics The University of LahoreLahorePakistan Department of Mathematics College of Science Al-ZulfiMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Mathematics College of Arts and Science at Wadi AldawaserPrince Sattam bin Abdulaziz UniversityAlkharj11991Kingdom of Saudi Arabia Department of Mathematics Technische Universitat ChemnitzGermany

Nonlinear modelling has a significant role in different disciplines of sciences such as behavioral,social,physical and biological *** structural properties are also needed for such types of disciplines,as dynamical consistency,positivity and boundedness are the major requirements of the models in these *** more thing,this type of nonlinear model has no explicit *** the sake of comparison its computation will be done by using different computational ***,the aforementioned structural properties have not been restored in the existing computational techniques in ***,the construction of structural preserving computational techniques are *** nonlinearmodel for cervical cancer is constructed by parametric perturbation ***-known computer methods are considered for the computation of cervical cancer *** well-known existing methods in literature are Euler Maruyama,Euler and Runge *** finite difference method or Implicitly driven explicit method is first time considered for aforesaid model under the assumptions given byMickens in a stochastic ***,the aforementioned existing methods did not reinstate structural properties of cervical cancer dynamics in the human *** plannedmethod is structural preserving and a powerful tool for all nonlinear models of biomedical engineering *** have verified that existing computational methods do not preserve dynamical ***,the implicitly driven explicit method is a good device for dynamical *** the support of assertions,convergence analysis of implicitly driven explicit method is presented.

关键词： Cervical cancer model differential equations computer methods convergence analysis

Ayurvedic drug induced liver injury

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World Journal of Hepatology 2017年第31期9卷 1205-1209页

作者： Kunal K dalal Thomas Holdbrook Steven R Peikin Department of Medicine Cooper Medical School of Rowan UniversityCooper University Hospital Department of Pathology Cooper Medical School of Rowan UniversityCooper University Hospital Division of Gastroenterology and Liver Disease Cooper Medical School of Rowan UniversityCooper University Hospital

Drug induced liver injury is responsible for 50% of acute liver failure in developed countries. Ayurvedic and homeopathic medicine have been linked to liver injury. This case describes the first documented case of Punarnava mandur and Kanchnar guggulu causing drug induced liver injury. Drug induced liver injury may be difficult to diagnosis, but use of multi-modalities tools including the ACG algorithms, causative assessment scales, histological findings, and imaging, is recommended. Advanced imaging, such as magnetic resonance cholangiopancreatography, may possibly have a greater role than previously reported in literature.

关键词： Ayurvedic Punarnava mandur Kanchnar guggulu Drug induced liver injury T2 heterogeneous hyperintensity Roussel Uclaf Causality Assessment Method

Particles dispersion on fluid-liquid interfaces

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Particuology 2011年第1期9卷 1-13页

作者： Sathish Gurupatham Bhavin dalal Md.Shahadat Hossain Ian S.Fischer Pushpendra Singh Daniel D.Joseph Department of Mechanical Engineering New Jersey Institute of Technology Department of Aerospace Engineering and Mechanics University of Minnesota Department of Mechanical and Aerospace Engineering University of California Irvine

This paper is concerned with the dispersion of particles on the fluid-liquid interface. In a previous study we have shown that when small particles, e.g., flour, pollen, glass beads, etc., contact an air-liquid interface, they disperse rapidly as if they were in an explosion. The rapid dispersion is due to the fact that the capillary force pulls particles into the interface causing them to accelerate to a large velocity. In this paper we show that motion of particles normal to the interface is inertia dominated; they oscillate vertically about their equilibrium position before coming to rest under viscous drag. This vertical motion of a particle causes a radially-outward lateral （secondary） flow on the interface that causes nearby particles to move away. The dispersion on a liquid-liquid interface, which is the primary focus of this study, was relatively weaker than on an air-liquid interface, and occurred over a longer period of time. When falling through an upper liquid the particles have a slower velocity than when falling through air because the liquid has a greater viscosity. Another difference for the liquid-liquid interface is that the separation of particles begins in the upper liquid before the particles reach the interface. The rate of dispersion depended on the size of the particles, the densities of the particle and liquids, the viscosities of the liquids involved, and the contact angle. For small particles, partial pinning and hysteresis of the three-phase contact line on the surface of the particle during adsorption on liquid-liquid interfaces was also important. The frequency of oscillation of particles about their floating equilibrium increased with decreasing particle size on both air-water and liquid-liquid interfaces, and the time to reach equilibrium decreased with decreasing particle size. These results are in agreement with our analysis.

关键词： Adsorption Interfacial tension Particle dispersion Fluid–liquid interface Capillary force Viscous drag

Deciphering the Hidden Secrets between the Early Skin Wrinkling & the Metabolic (X) Syndrome with the Possible Reversal of This Process at the Molecular Level

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Journal of Cosmetics, Dermatological Sciences and Applications 2024年第1期14卷 45-68页

作者： dalal Alsaadoun Dermatology Department King Faisal University Hofuf Kingdom of Saudi Arabia

The aging process is a group of degenerative changes that physiologically occur in most of the people in the elderly. This affects one or more of the human body systems. The treatment of diseases related to the aging process has a huge impact on the economy of all nations. Aging of the skin comes on the top and despite that, the results of the already present lines of treatment are not always satisfactory. This acts as a stimulus for us to dig deeper to discover the root causes of the premature aging of the skin. This was simply caused by the accumulation of repeated minute damage to the internal structure skin. In other words, if the degree of minute damage is more than the capacity of the skin to repair, the repeated micro-damage is presented in the long run as a skin wrinkling. Moreover, the skin acts as a mirror that reflects the internal structures of the human body. Thus, the more degenerative changes in the human body systems, the more the skin could become wrinkled. Our strategy to prevent or at least slow down the aging process of the skin depends on 2 main steps;the 1st is to reduce the micro-damage as can as possible, and the 2nd is to enhance the capacity of tissue regeneration to be able to reverse the already present damaged skin. As the 2 processes are synchronized with each other, this strategy would be considered the ideal for prevention of skin wrinkling especially premature ones. This not only reverses premature skin wrinkling but also protects it from future wrinklings. This review sharply pointed out the role of the functional collagen of the dermal layer of the skin in the prevention of skin wrinklings. Therefore, it would be the target to study how collagen works in the complex machinery of the dermal layer of the skin. This concept deeply believes that the recovery of dermal collagen has a much better effect than simply ingesting collagen or receiving a topical collagen booster. .

关键词： Collagen Skin Wrinkling Glycation Hyper-Insulinemia Hidden Obesity Vis-ceral Fat Inflammatory Cytokines

Analytical solution for concentration distribution in an open channel flow with phase exchange kinetics

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Acta Mechanica Sinica 2022年第3期38卷 64-77,I0002页

作者： Swamp Barik D.C.dalal Department of Mathematics Indian Institute of Technology GuwahatiGuwahati 781039India Department of Mathematics SRM Institute of Science and TechnologyChennai 603203India

This study is about an analytical attempt that explores the two-dimensional concentration distribution of a solute in an open channel *** solute undergoes reversible sorption at the channel *** method of multiple scales is used to find the two-dimensional concentration distribution,which is important for modem day application in industry,environmental risk assessment,*** deduces an analytic expression of two-dimensional concentration distribution for an open channel flow with sorptive channel *** of retention parameter,Darnkohler number on the solute dispersion are also discussed in this *** reveal that slow or strong kinetics(small value of Darnkohler number)increases solute *** is also *** for slow phase exchange kinetics between bulk flow and small retentive channel bed,solute concentration distribution will uniform faster than their inert counterpart.

关键词： Multi-scale method Dispersion coefficient Two-dimensional concentration distribution Phase exchange kinetics

Adomian Decomposition Method for Solving Fractional Time-Klein-Gordon Equations Using Maple

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Applied Mathematics 2023年第6期14卷 411-418页

作者： dalal Albogami dalal Maturi Hashim Alshehri Department of Mathematics King Abdulaziz University Jeddah Saudi Arabia

Adomian decomposition is a semi-analytical approach to solving ordinary and partial differential equations. This study aims to apply the Adomian Decomposition Technique to obtain analytic solutions for linear and nonlinear time-fractional Klein-Gordon equations. The fractional derivatives are computed according to Caputo. Examples are provided. The findings show the explicitness, efficacy, and correctness of the used approach. Approximate solutions acquired by the decomposition method have been numerically assessed, given in the form of graphs and tables, and then these answers are compared with the actual solutions. The Adomian decomposition approach, which was used in this study, is a widely used and convergent method for the solutions of linear and non-linear time fractional Klein-Gordon equation.

关键词： Adomian Decomposition Klein-Gordon Fractional Calculus