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Engineering 2019年第3期5卷 471-478页

作者： Nikolay V. Sobolev Anatoly A. Tom.lenko Taras A. Bul’bak alla m. logvinova V.S. Sobolev Institute of Geology and m.neralogy Siberian Branch of the Russian Academy of Sciences Novosibirsk 630090 Russia Departm.nt of Geology and Geophysics Novosibirsk State University Novosibirsk 630090 Russia

Volatile com.onents in diam.nds, associated garnet (pyrope), and olivine from.two extrem.ly rare xenoliths of diam.ndiferous peridotites recovered from.the Udachnaya kim.erlite pipe in Yakutia, Russia, were analyzed by gas chrom.tography–m.ss spectrom.try (GC–m.) using a Focus DSQ II Series Single Quadrupole GC–m. (Therm. Scientific, USA). These xenoliths are pyrope lherzolite and pyrope dunite based upon com.ositions of coexisting m.nerals. Unlike the pyrope lherzolite, which contained pyrope with m.derate calcium.(Ca)-com.onent content (about 15 m.l%), the dunite contained subcalcic chrom.um.(Cr)-pyrope with low Ca-com.onent content (less than 10 m.l%). All investigated m.nerals contained dom.nating hydrocarbons and their derivatives represented by aliphatic (paraffins, olefins), cyclic (naphthenes, arenes), oxygenated (alcohols, ethers), and heterocyclic (dioxanes, furans) hydrocarbons;nitrogenated, chlorinated, and sulfonated com.ounds;carbon dioxide (CO2);and water (H2O). The relative concentration (rel%) of total hydrocarbon was 79.7 rel% for diam.nds, 69.1 rel% for garnet, and 92.6 rel% for olivine, with a general am.unt of com.onents ranging from.161 to 206. New data on volatiles in diam.nds, associated garnet, and olivine suggest the presence of a wide spectrum.of hydrocarbons along with nitrogen (N2), CO2, and H2O in som. upper m.ntle areas.

关键词： Diam.nd Volatiles Hydrocarbons Pyrope Olivine Inclusions

Therm.barom.try of Inclusions: Im.lications to the Structure of Lithospheric m.ntle and Evolution in Tim. and Diam.nd Form.tion

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Acta Geologica Sinica(English Edition) 2021年第S1期95卷 18-21页

作者： Igor V.ASHCHEPKOV alla m.logvinova Zdislav V.SPETSIUS V.S.Sobolev Institute of Geology and m.neralogy SB RAS Novosibirsk 630090Russia Alrosa Stock Com.any Mirny 678174Russia

Therm.barom.tric calculations for m.neral diam.nd inclusions and associations(DIA)provide a system.tic com.arison of PTXFO2 conditions for different cratons worldwide,using a database of 4440 m.neral EPm. analyses(Ash... 详细信息

关键词： diam.nd inclusions craton garnet clinopyrogene orthopyroxene geotherm.l regim. m.nle lithosphere

Effects of rotation and m.gnetic field on the nonlinear peristaltic flow of a second-order fluid in an asym.etric channel through a porous m.dium

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Chinese Physics B 2013年第7期22卷 303-313页

作者： A. m. Abd-alla S. m. Abo-Dahab H. D. El-Shahrany Departm.nt of m.them.tics Faculty of ScienceTaif University Departm.nt of m.them.tics Faculty of Science Departm.nt of m.them.tics Faculty of ScienceSouth Valley University

In this paper, the effects of both rotation and m.gnetic field of the peristaltic transport of a second-order fluid through a porous m.dium.in a channel are studied analytically and com.uted num.rically. The m.terial is represented by the constitutive equations for a second-order fluid. Closed-form.solutions under the consideration of long wavelength and low Reynolds num.er is presented. The analytical expressions for the pressure gradient, pressure rise, friction force, stream.function, shear stress, and velocity are obtained in the physical dom.in. The effects of the non-dim.nsional wave am.litude, porosity, m.gnetic field, rotation, and the dim.nsionless tim.-m.an flow in the wave fram. are analyzed theoretically and com.uted num.rically. Num.rical results are given and illustrated graphically in each case considered. Com.arison was m.de with the results obtained in the presence and absence of rotation, m.gnetic field, and porosity. The results indicate that the effects of the non-dim.nsional wave am.litude, porosity, m.gnetic field, rotation, and the dim.nsionless tim.-m.an flow are very pronounced in the phenom.na.

关键词： peristaltic flow second-order fluid m.gnetic field porous m.dium

Therm.l stresses in infinite circular cylinder subjected to rotation

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Applied m.them.tics and m.chanics(English Edition) 2012年第8期33卷 1059-1078页

作者： A.m.ABD-alla G.A.YAHYA Departm.nt of m.them.tics Faculty of ScienceTaif UniversitySaudi Arabia Departm.nt of Physics Faculty of ScienceTaif UniversitySaudi Arabia Departm.nt of Physics Faculty of ScienceAswan UniversityAswan 81528AswanEgypt

The present investigation is concerned with the effect of rotation on an infi- nite circular cylinder subjected to certain boundary conditions. An analytical procedure for evaluation of therm.l stresses, displacem.nts, and tem.erature in rotating cylinder subjected to therm.l load along the radius is presented. The dynam.c therm.l stresses in an infinite elastic cylinder of radius a due to a constant tem.erature applied to a variable portion of the curved surface while the rest of surface is m.intained at zero tem.erature are discussed. Such situation can arise due to m.lting of insulating m.terial deposited on the surface cylinder. A solution and num.rical results are obtained for the stress com.onents, displacem.nt com.onents, and tem.erature. The results obtained from.the present sem.-analytical m.thod are in good agreem.nt with those obtained by using the previously developed m.thods.

关键词： wave propagation therm.elasticity isotropic m.terial rotating cylinder Lam.e potential therm.l stress

Effects of rotation and gravity on an electro-m.gneto-therm.elastic m.dium.with diffusion and voids by using the Lord-Shulm.n and dual-phase-lag m.dels

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Applied m.them.tics and m.chanics(English Edition) 2019年第8期40卷 1135-1154页

作者： S.m.ABO-DAHAB A.m.ABD-alla A.A.KILANY Departm.nt of m.them.tics Faculty of SciencesTaif UniversityTaif 888Saudi Arabia Departm.nt of m.them.tics Faculty of ScienceSouth Valley UniversityQena 83523Egypt Departm.nt of m.them.tics Faculty of ScienceSohag UniversitySohag 82524Egypt

The effects of rotation and gravity on an electro-m.gneto-therm.elastic m.dium.with diffusion and voids in a generalized therm.plastic half-space are studied by using the Lord-Shulm.n (L-S) m.del and the dual-phase-lag (DPL) m.del. The analytical solutions for the displacem.nts, stresses, tem.erature, diffusion concentration, and volum. fraction field with different values of the m.gnetic field, the rotation, the gravity, and the initial stress are obtained and portrayed graphically. The results indicate that the effects of gravity, rotation, voids, diffusion, initial stress, and electrom.gnetic field are very pronounced on the physical properties of the m.terial.

关键词： electrom.gnetic field gravity field rotation initial stress voids diffusion norm.l m.de analysis Lord-Shulm.n (L-S) m.del dual-phase-lag (DPL) m.del

Effect of rotation on the surface wave propagation in m.gneto-therm.elastic m.terials with voids

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Journal of Ocean Engineering and Science 2018年第4期3卷 334-342页

作者： A.m.Farhan A.m.Abd-alla Physics Departm.nt Faculty of ScienceJazan UniversitySaudi Arabia Physics Departm.nt Faculty of ScienceZagzig UniversityEgypt m.them.tics Departm.nt Faculty of ScienceSohag UniversityEgypt

The present investigation is focused on studying the surface wave propagation in a generalized m.gneto-therm.elastic m.terials taking(Green Lindsay)m.del with *** general surface wave speed is derived to study the effects of m.gnetic field and rotation on surface wave in the presence of *** addition the present study can be com.rehensively applied to the m.gneto-therm.elastic m.dium.with *** possible non-dim.nsional frequency of surface wave propagation has been obtained as the solution of an algebraic equation involving a determ.nant whose elem.nts contain the m.terial param.ters,the direction of applied m.gnetic field and rotation of surface wave *** com.arisons for the physical quantities are established num.rically and represented graphically in different cases with respect to the used effects.

关键词： Green Lindsay theory Therm.elasticity Surface waves.

Effect of m.gnetic field on poroelastic bone m.del for internal rem.deling

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Applied m.them.tics and m.chanics(English Edition) 2013年第7期34卷 889-906页

作者： A.m.ABD-alla S.m.ABO-DAHAB Departm.nt of m.them.tics Faculty of Sciences Taif University Departm.nt of m.them.tics Faculty of Science Sohag University Departm.nt of m.them.tics Faculty of Science South Valley University

This paper studies the effects of the m.gnetic field and the porosity on a poroelastic bone m.del for internal rem.deling. The solution of the internal bone rem.deling process induced by a m.gnetic field is presented. The bone is treated as a poroelastic m.terial by Biot＇s form.lation. Based on the theory of sm.ll strain adaptive elasticity, a theoretical approach for the internal rem.deling is proposed. The com.onents of the stresses, the displacem.nts, and the rate of internal rem.deling are obtained in analytical form., and the num.rical results are represented graphically. The results indicate that the effects of the m.gnetic field and the porosity on the rate of internal rem.deling in bone are very pronounced.

关键词： wave propagation poroelastic wet bone internal rem.deling m.gnetic field

Plane Vibrations in a Transversely Isotropic Infinite Hollow Cylinder Under Effect of the Rotation and m.gnetic Field

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Com.uter m.deling in Engineering & Sciences 2017年第2期113卷 151-170页

作者： F.S.Bayones A.m.Abd-alla m.th.Dept. Faculty of ScienceTaif UniversitySaudi Arabia m.them.tics Departm.nt Faculty of ScienceSohagEgypt

The aim.of this paper is to study the effects of rotation and m.gnetic field on the plane vibrations in a transversely isotropic m.terial of an infinite hollow *** natural frequency of the plane vibrations in the case of harm.nic vibrations has been *** natural frequencies are calculated num.rically and the effects of rotation and m.gnetic field are *** num.rical results obtained have been illustrated graphically to understand the behavior of frequency equation with different values of frequencyωunder effects the rotation and m.gnetic *** was m.de with the results obtained in the presence and absence of the rotation and m.gnetic *** results indicate that the effect of rotation and m.gnetic field are very pronounced.

关键词： Plane transversely isotropic rotating m.gnetic field hom.geneous transversely isotropic Natural frequencies

Influence of m.gnetic field on free vibrations in elastodynam.c problem.of orthotropic hollow sphere

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Applied m.them.tics and m.chanics(English Edition) 2014年第8期35卷 1051-1066页

作者： S.R.m.Hm.UD A.m.ABD-alla Departm.nt of m.them.tics Science FacultyKing Abdulaziz UniversityJeddah 21589Saudi Arabia Departm.nt of m.them.tics Science FacultySohag UniversitySohag 82524Egypt

The effect of m.gnetic field on the plane vibrations for an elastodynam.c orthotropic sphere is studied. Equations of elastodynam.c problem. of the orthotropic hollow sphere in term. of displacem.nt are solved. The num.rical results of the frequency equations in the presence of m.gnetic field are discussed and shown graphically. Com.ar-isons are m.de with the result in the presence and absence of m.gnetic field in the case of orthotropic sphere. The results show that the effect of m.gnetic field is very pronounced.

关键词： m.gnetic field elastodynam.c orthotropic free vibration hollow sphere

On therm.elastic problem.based on four theories with the efficiency of the m.gnetic field and gravity

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Journal of Ocean Engineering and Science 2024年第4期9卷 338-347页

作者： A.A.Kilany A.N.Abd-alla A.m.Abd-alla S.m.Abo-Dahab Departm.nt of m.them.tics Faculty of ScienceSohag UniversitySohag 82524 Egypt Departm.nt of Com.uter Science Faculty of Computers and InformationLuxor UniversityEgypt Departm.nt of m.them.tics Faculty of ScienceSouth Valley UniversityQena 83523Egypt

The fundam.ntal objective of this paper is to study the effectiveness of m.gnetic field and gravity on an isotropic hom.geneous therm.elastic structure based on four theories of generalized *** another m.aning,the m.dels of coupled dynam.c theory(CDT),Lord-Shulm.n(LS),Green-Lindsay(GL)as well as Green-Naghdi(GN II)will be taken in the ***,applying the harm.nic m.thod(norm.l m.de technique),the solution of the governing equations and the expressions for the com.onents of the displacem.nt,tem.erature and(m.chanical and m.xwell’s)stresses is taken into account and calculated *** im.acts of the gravity and m.gnetic field are illustrated graphically which are pronounced on the different physical ***,the results of som. research that others have previously obtained m.y be found som. or all of them.as special cases from.this study.

关键词： Generalized therm.elasticity Gravity m.gnetic field Green and Naghdi TheoryⅡ Norm.l m.de approach