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motion of a spherical particle in a fluid forced vortex by DQm and DTm

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Particuology 2014年第5期12卷 206-212页

作者： m.hatami D.D.Ganji Esfarayen University Department of Mechanical EngineeringEsfarayenNorth KhorasanIran mechanical Engineering Faculty Babol University of TechnologyBabolP.O.Box 484Iran

In this study, coupled equations of the motion of a particle in a fluid forced vortex were investigated using the differential transformation method （DTm） with the Pad6 approximation and the differential quadrature method （DO_m）. The significant contribution of the work is the introduction of two new, fast and efficient solutions for a spherical particle in a forced vortex that are improvements over the previous numerical results in the literature. These methods represent approximations with a high degree of accuracy and minimal computational effort for studying the particle motion in a fluid forced vortex. In addition, the velocity profiles （angular and radial） and the position trajectory of a particle in a fluid forced vortex are described in the current study.

关键词： Spherical particle Forced vortex Differential transformation method (DTm)Angular velocity Differential quadrature method (DQm)

Quantum phase distribution and the number-phase Wigner function of the generalized squeezed vacuum states associated with solvable quantum systems

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Chinese Physics B 2012年第5期21卷 265-273页

作者： G.R.Honarasa m.K.Tavassoly m.hatami Department of Physics Faculty of ScienceShiraz University of Technology Atomic and molecular Group Faculty of PhysicsYazd University

The quantum phase properties of the generalized squeezed vacuum states associated with solvable quantum systems are studied by using the Pegg-Barnett ***,two nonclassical features,i.e.,squeezing in the number and phase operators,as well as the number-phase Wigner function of the generalized squeezed states are *** to some actual physical situations,the present approach is applied to two classes of generalized squeezed states：solvable quantum systems with discrete spectra and nonlinear squeezed states with particular nonlinear ***,the time evolution of the nonclassical properties of the considered systems has been numerically investigated.

关键词： squeezed vacuum states solvable quantum systems phase distribution number phaseWigner function

Quantum Squeezing of Dark Solitons in Optical Fibers

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Communications in Theoretical Physics 2011年第8期56卷 322-326页

作者： G.R.Honarasa m.hatami m.K.Tavassoly Atomic and molecular Group Faculty of PhysicsYazd University Physics Group Faculty of ScienceShiraz University of Technology

在纤维的黑暗 soliton 繁殖的量子论基于 linearization 近似被学习。当时，在光子数字，阶段，位置(时间) 和使量子化的黑暗 solitons 的动量的无常是计算的。最后，压榨黑暗 soliton 被使用 homodyne 察觉并且与明亮的 soliton 大小... 详细信息

在纤维的黑暗 soliton 繁殖的量子论基于 linearization 近似被学习。当时，在光子数字，阶段，位置(时间) 和使量子化的黑暗 solitons 的动量的无常是计算的。最后，压榨黑暗 soliton 被使用 homodyne 察觉并且与明亮的 soliton 大小写相比调查。

关键词：量子理论暗孤子光纤压缩线性近似孤子传输零差检测光子数

Investigation of third-grade non-Newtonian blood flow in arteries under periodic body acceleration using multi-step differential transformation method

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Applied mathematics and mechanics(English Edition) 2015年第11期36卷 1449-1458页

作者： m.hatami S.E.GHASEmI S.A.R.SAHEBI S.mOSAYEBIDORCHEH D.D.GANJI J.hatami Department of mechanical Engineering Esfarayen University of Technology Young Researchers and Elite Club Islamic Azad University Deptartment of mechanical Engineering Islamic Azad University Department of mechanical Engineering Babol University of Technology Garmsar Health & Care Center Semnan University of Medical Sciences

In this paper, a non-Newtonian third-grade blood in coronary and femoral arteries is simulated analytically and numerically. The blood is considered as the third- grade non-Newtonian fluid under the periodic body acceleration motion and the pulsatile pressure gradient. The hybrid multi-step differential transformation method （Hybrid-ms- DTm） and the Crank-Nicholson method （CNm） are used to solve the partial differential equation （PDE）, and a good agreement between them is observed in the results. The effects of the some physical parameters such as the amplitude, the lead angle, and the body acceleration frequency on the velocity and shear stress profiles are considered. The results show that increasing the amplitude, Ag, and reducing the lead angle of body acceleration, 9, make higher velocity profiles on the center line of both arteries. Also, the maximum wall shear stress increases when Ag increases.

关键词： pulsatile blood third-grade non-Newtonian fluid differential transforma-tion method (DTm) femoral artery coronary artery

Numerical study on polymer nanofibers with electrically charged jet of viscoelastic fluid in electrospinning process

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Journal of Central South University 2017年第10期24卷 2275-2280页

作者： P.Valipour H.Zaersabet m.hatami Ali Zolfagharian S.E.Ghasemi Department of Textile and Apparel Qaemshahr BranchIslamic Azad UniversityQaemshahrIran Department of mechanical Engineering Esfarayen University of TechnologyEsfarayenNorth KhorasanIran School of Engineering Deakin UniversityGeelongVictoria 3216Australia Young Researchers and Elite Club Sari BranchIslamic Azad UniversitySariIran

Electrospinning is a useful and efficient technique to produce polymeric nanofibers. Nanofibers of polymers are electrospun by creating an electrically charged jet of polymer solution. Numerical study on non-Newtonian and viscoelastic jets of polymer nanofibers in electrospinning process is presented in this work. In particular, the effect of non-Newtonian rheology on the jet profile during the electrospinning process is examined. The governing equations of the problem are solved numerically using the Keller-Box method. The effects of yield stress and power-law index on the elongation, velocity, stress and total force are presented and discussed in detail. The results show that by increasing the values of yield stress, the fluid elongation is reduced significantly.

关键词： nanofibers electrospinning electrically charged jet viscoelastic fluid synthetic polymers

Heat transfer study on solid and porous convective fins with temperature-dependent heat generation using efficient analytical method

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Journal of Central South University 2014年第12期21卷 4592-4598页

作者： S.E.Ghasemi P.Valipour m.hatami D.D.Ganji Young Reseachers and Elite Club Qaemshahr Branch Islamic Azad University Department of Textile and Apparel Qaemshahr Branch Islamic Azad University Department of mechanical Engineering Esfarayen University of Technology Department of mechanical Engineering Babol University of Technology

A simple and highly accurate semi-analytical method, called the differential transformation method(DTm), was used for solving the nonlinear temperature distribution equation in solid and porous longitudinal fin with temperature dependent internal heat generation. The problem was solved for two main cases. In the first case, heat generation was assumed variable by fin temperature for a solid fin and in second heat generation varied with temperature for a porous fin. Results are presented for the temperature distribution for a range of values of parameters appearing in the mathematical formulation(e.g. N, εG, and G). Results reveal that DTm is very effective and convenient. Also, it is found that this method can achieve more suitable results in comparison to numerical methods.

关键词：温度依赖性纵向翅片多孔固体发热传热对流温度分布

Unsteady sedimentation analysis of spherical particles in Newtonian fluid media using analytical methods

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Propulsion and Power Research 2014年第2期3卷 96-105页

作者： R.Nouri D.D.Ganji m.hatami mechanical Engineering Faculty Babol University of TechnologyBabolP.O.Box 484Iran mechanical Engineering Department Esfarayen UniversityEsfarayenNorth KhorasanIran

Unsteady settling behavior of solid spherical particles falling in water as a Newtonian fluid is investigated using a drag coefficient of the form given by Ferreira et *** transformation method(DTm),Galerkin method(Gm),collocation method(Cm),and numerical methods are applied to analyze the characteristics of particles *** influence of physical parameters on terminal velocity is discussed and moreover,comparing the techniques,it is showed that Gm and Cm are very efficient for solving the governing equation and DTm with Padéapproximation has the best agreement with numerical *** novelty of this work is introducing three simple and exact analytical method for solving the nonlinear equation of sedimentation and applied it in many industrial and chemical applications。

关键词： Drag coefficient Spherical particles Differential transformation method(DTm)-Padé Galerkin method Collocation method Sedimentation

Propulsion and launching analysis of variable-mass rockets by analytical methods

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Propulsion and Power Research 2013年第3期2卷 225-233页

作者： D.D.Ganji m.Gorji m.hatami A.Hasanpour N.Khademzadeh mechanical Engineering Faculty Babol University of TechnologyBabolP.O.Box 484Iran mechanical Engineering Department Ferdowsi University of MashhadMashhadIran Esfarayen Faculty of Industrial and Engineering Department of Mechanical EngineeringEsfarayenNorth KhorasanIran

In this study,applications of some analytical methods on nonlinear equation of the launching of a rocket with variable mass are *** transformation method(DTm),homotopy perturbation method(HPm)and least square method(LSm)were applied and their results are compared with numerical *** excellent agreement with analytical methods and numerical ones is observed in the results and this reveals that analytical methods are effective and *** a parametric study is performed here which includes the effect of exhaust velocity(C_(e)),bum rate(BR)of fuel and diameter of cylindrical rocket(d)on the motion of a sample rocket,and contours for showing the sensitivity of these parameters are *** main results indicate that the rocket velocity and altitude are increased with increasing the C_(e) and BR and decreased with increasing the rocket diameter and drag coefficient.

关键词： Thrust force Drag force Variable massrockets Differential transformation method Homotopy perturbation method Least squaremethod

Protective effects of cyclosporine and its analog NIm-811 in a murine model of hepatic ischemia-reperfusion injury

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Liver Research 2024年第1期8卷 46-53页

作者： Joshua Hefler Rena Pawlick Braulio A.marfil-Garza Aducio Thiesen Nerea Cuesta-Gomez Sanaz hatami Darren H.Freed Constantine Karvellas David L.Bigam A.m.James Shapiro Department of Surgery Faculty of Medicine&DentistryUniversity of AlbertaEdmontonABCanada Department of medicine Faculty of Medicine&DentistryUniversity of AlbertaEdmontonABCanada CHRISTUS-LatAm Hub Excellence&Innovation Center MonterreyMexico Alberta Diabetes Institute University of AlbertaEdmontonABCanada Clinical Islet Transplant Program University of AlbertaEdmontonABCanada Department of Laboratory medicine&Pathology Faculty of Medicine&DentistryUniversity of AlbertaEdmontonABCanada

Background and aim:The liver is susceptible to ischemia-reperfusion injury(IRI)during hepatic surgery,when the vessels are compressed to control bleeding,or liver transplantation,when there is an obligate period of *** hallmark of IRI comprises mitochondrial dysfunction,which generates reactive oxygen species,and cell death through necrosis or ***(CsA),which is a well-known immunosuppressive agent that inhibits calcineurin,has the additional effect of inhibiting the mito-chondrial permeability transition pore(mPTP),thereby,preventing mitochondrial swelling and ***-811,which is the nonimmunosuppressive analog of CsA,has a similar effect on the *** this study,we tested the effect of both agents on mitigating warm hepatic IRI in a murine *** and methods:Before ischemic insult,the mice were administered with intraperitoneal normal saline(control);CsA at 2.5,10,or 25 mg/kg;or NIm-811 at 10 mg/***,the mice were subjected to partial warm hepatic ischemia by selective pedicle clamping for 60 min,followed by 6 h of recovery after *** alanine transaminase(ALT)was measured,and the liver tissue was examined histologically for the presence of apoptosis and the levels of inflammatory ***:Compared with the control mice,the mice treated with 10 and 25 mg/kg of CsA and NIm-811 had significantly lower ALT levels(Pmoreover,the liver tissue showed reduced histological injury scores after treatment with CsA at 2.5,10,and 25 mg/kg and NIm-811(P=0.041,ment with CsA at all doses(P=0.012,0.007,andmmatory cyto-kines,particularly interleukin(IL)-1β,IL-2,IL-4,IL-10,and keratinocyte chemoattractant/human growth-regulated oncogene significantly decreased in the mice treated with the highest dose of CsA(25 mg/kg)than those in the control ***

关键词： Cyclosporine(CsA) Cyclosporine analogue Liver surgery Ischemia-reperfusion injury(IRI) Animal model NIm-811