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Theoretical Studies on Interaction Between Methanol and Functionalized Single-Walled Carbon Nanotubes

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Communications in Theoretical Physics 2011年第2期55卷 365-370页

作者： M.d.ganji M.Goodarzi M.Nashtahosseini A.Mommadi-nejad department of Chemistry Islamic Azad University Ghaemshahr Branch Mazandaran Iran department of Chemistry Islamic Azad University Arak Branch Young Researchs Club Iran department of Computer Engineering Olom Fonon University of Mazandaran Babol Iran

We study the adsorption of a methanol molecule on single-walled carbon nanotubes （SWCNTs） with various diameters and chiral angles by using the density functional theory based calculations. We find that methanol prefers to be adsorbed physically on the exterior surface of chiral nanotubes in comparison to the armchair and zigzag tubes with binding energy of about -2.76 kcal/mol, which is consistent with recent experimental and theoretical investigation results. We further consider the adsorption of methanol on the exterior surface and edge site of functionalized SWCNTs. The obtained results indicate that the binding energy of methanol is significantly increased for adsorption on the sidewall of functionalized nanotubes. It is also found that the adsorption of methanol at the edge site of both functionalized and pristine SWCNT is remarkably different （chemisoption process） in comparison to the exterior sidewall of the tubes. Furthermore, the electronic structures and Mulliken charge population of the considered complexes at their ground state are discussed within the context.

关键词： Fuel cells methanol functionalized SWCNTs adsorption ab initio calculations

Forced convection heat transfer due to different inclination angles of splitter behind square cylinder

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Applied Mathematics and Mechanics(English Edition) 2013年第5期34卷 541-558页

作者： S.M.SEYYEdI d.d.ganji M.GORJI H.BARARNIA S.SOLEIMANI department of Mechanical Engineering Babol University of Technology

A numerical investigation is carried out to study the effect of splitter＇s inclination angle behind an inclined square cylinder on the forced convection heat transfer in a plan channel using the lattice Boltzmann method （LBM）. The simulations are conducted for the pertinent parameters in the following ranges： the Reynolds number Re=50-300, the gap ratio G/d = 2, and the splitter＇s inclination angle 8 = 0°-90°. The results show that with the increase in the angle of the splitter, the drag coefficient initially decreases and then increases. Moreover, the time-averaged Nusselt number at a certain angle increases noticeably.

关键词： S. M. SEYYEdI d.d. ganji M. GORJI H. BARARNIA S. SOLEIMANI (forced convection inclined splitter square cylinder plan channel lattice Boltzmann method (LBM))

Non-Newtonian fluid flow in an axisymmetric channel with porous wall

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Propulsion and Power Research 2013年第4期2卷 254-262页

作者： M.Hosseini Z.Sheikholeslami d.d.ganji department of Mechanical Engineering Islamic Azad UniversityQaemshahr BranchQaemshahrMazandaranIran department of Civil Engineering University of MazandaranBabolsarIran department of Mechanical Engineering Babol University of TechnologyBabolIran

In the present article Optimal Homotopy Asymptotic Method(OHAM)is used to obtain the solutions of momentum and heat transfer equations of non-Newtonian fluid flow in an axisymmetric channel with porous wall for turbine cooling *** method is used for validity of this analytical method and excellent agreement is observed between the solutions obtained from OHAM and numerical *** to this validity,effects of some other parameters are *** results show that Nusselt number increases with increase of Reynolds number,Prandtl number and power law index.

关键词： Non-Newtonian fluid Axisymmetric channel Porous media Optimal Homotopy Asymptotic Method(OHAM) Heat transfer

Study on motion of rigid rod on a circular surface using MHPM

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Propulsion and Power Research 2014年第3期3卷 159-164页

作者： Seiyed E.Ghasemi Ali Zolfagharian d.d.ganji Young Researchers cand Elite Club Qaemshahr BranchIslcomic Azad UniversityQaemshahrIran department of Mechanical Engineering Babol University of TechnologyBabolIran

In this paper motion of rigid rod on a circular surface is studied analytically.A new analytical method called modified homotopy perturbation method(MHPM)is applied for solving this problem in different initial conditions to show capability of this *** goveming equation for motion of a nigid rod on the circular surface without slipping have been solved using *** efficacy of MHPM for handling nonlinear oscillation systems with various small and large oscillation amplitudes are presented in comparison with numerical *** reveal that MHPM has an excellent agreement with numerical *** results show that by decreasing the oscillation amplitude,the velocity of rigid rod.d.creases and for A=w3 the velocity profile is maximum.

关键词： Modified homotopy perturbation method(MHPM) Rigid rod Nonlinear equation Circular surface Frequency

Investigation of nanofluid flow in a vertical channel considering polynomial boundary conditions by Akbari-ganji’s method

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Theoretical & Applied Mechanics Letters 2022年第4期12卷 257-266页

作者： M.Fallah Najafabadi H.TalebiRostami Kh.Hosseinzadeh d.d.ganji department of Mechanical Engineering Babol Noshirvani University of TechnologyBabolIran department of Mechanical Engineering Amirkabir University of TechnologyTehranIran

In this research,a vertical channel containing a laminar and fully developed nanofluid flow is *** channel surface’s boundary conditions for temperature and volume fraction functions are considered qth-order *** equations related to this problem have been extracted and then solved by the AGM and validated through the Runge-Kutta numerical method and another similar *** the study,the effect of parameters,including Grashof number,Brownian motion parameter,etc.,on the motion,velocity,temperature,and volume fraction of nanofluids have been *** results demonstrate that increasing the Gr number by 100%will increase the velocity profile function by 78%and.d.crease the temperature and fraction profiles by 20.87%and 120.75%.Moreover,rising the Brownian motion parameter in five different sizes(0.1,0.2,0.3,0.4,and 0.5)causes lesser velocity,about 24.3%at first and 4.35%at the last level,and a maximum 52.86%increase for temperature and a 24.32%rise for ψ occurs when N b rises from 0.1 to *** all N_(t) values,at least 55.44%,18.69%,for F(η),andΩ(η),and 20.23%rise for ψ(η)function is ***,enlarging the N r parameter from 0.25 to 0.1 leads F(η)to rise by 199.7%,fluid.d.mensionless temperature,and.d.mensional volume fraction to decrease by 18%and 92.3%.In the end,a greater value of q means a more powerful energy source,amplifying all velocity,temperature,and volume fraction *** main novelty of this research is the combined convection qth-order polynomials boundary condition applied to the channel ***,The AMG semi-analytical method is used as a novel method to solve the governing equations.

关键词： Akbari-ganji’s method Nanofluid Vertical channel Combined convection Polynomial boundary condition

Analytical investigation of steady three-dimensional problem of condensation film on inclined rotating disk by Akbari-ganji's method

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Propulsion and Power Research 2017年第4期6卷 277-284页

作者： S.Berkan S.R.Hoseini d.d.ganji department of Mechanical Engineering Babol University of TechnologyBabolIran

The steady three-dimensional problem of condensation film on an inclined rotating disk is illustrated in this study. The governing non-linear partial differential equations are reduced to the nonlinear ordinary differential equations system by similarity transform. The analytical solution applied to solve this system is the Akbari-ganji's method (AGM). The velocity and temperature profiles are shown and the influence of Prandtl number and rotation ratio on the flow field, heat transfer and the Nusselt number are discussed in detail. The validity of our solutions is verified by the numerical results.

关键词： Rotating disk Condensation film Heat and mass transfer Film thickness

Unsteady time-dependent incompressible Newtonian fluid flow between two parallel plates by homotopy analysis method(HAM),homotopy perturbation method(HPM)and collocation method(CM)

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Propulsion and Power Research 2018年第3期7卷 247-256页

作者： M.R.Shirkhani H.A.Hoshyar I.Rahimipetroudi H.Akhavan d.d.ganji department of Mechanical Engineering Sari BranchIslamic Azad UniversitySariIran Young Researchers Club Sari BranchIslamic Azad UniversitySariIran department of Mechanical Engineering Ghaemshahr BranchIslamic Azad UniversityGhaemshahrIran

Analytical and numerical analyses have performed to study the problem of the flow of incompressible Newtonian fluid between two parallel plates approaching or receding from each other *** Navier–Stokes equations have been transformed into an ordinary differential equation using a similarity *** powerful analytical methods called collocation method(CM),the homotopy perturbation method(HPM),and the homotopy analysis method(HAM)have been used to solve nonlinear differential *** has been attempted to show the capabilities and wide-range applications of the proposed methods in comparison with a type of numerical analysis as fourth-order Runge–Kutta numerical method in solving this ***,velocity fields have been computed and shown graphically for various values of physical *** objective of the present work is to investigate the effect of Reynolds number and suction or injection characteristic parameter on the velocity field.

关键词： Homotopy analysis method(HAM) Collocation method(CM) Homotopy perturbation method(HPM) Parallel porous plates Unsteady flow

Solving nonlinear differential equations of Vanderpol, Rayleigh and.d.ffing by AGM

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Frontiers of Mechanical Engineering 2014年第2期9卷 177-190页

作者： M. R. AKBARI d. d. ganji A. MAJIdIAN A. R. AHMAdI department of Civil Engineering and Chemical Engineering University of Tehran Yehran Iran department of Mechanical Engineering Babol University of Technology Babol Iran department of Mechanical Engineering Sari Branch Islamic Azad University Sari Iran

In the present paper, three complicated non- linear differential equations in the field of vibration, which are Vanderpol, Rayleigh and.d.ffing equations, have been analyzed and solved completely by Algebraic Method （AGM）. Investigating this kind of equations is a very hard task to do and the obtained solution is not accurate and reliable. This issue will be emerged after comparing the achieved solutions by numerical method （Runge-Kutte 4th）. Based on the comparisons which have been made between the gained solutions by AGM and numerical method, it is possible to indicate that AGM can be successfully applied for various differential equations particularly for difficult ones. The results reveal that this method is not only very effective and simple, but also reliable, and can be applied for other complicated nonlinear problems.

关键词： Algebraic Method (AGM) Angular Frequency Vanderpol Rayleigh duffing

On the MHd squeeze flow between two parallel disks with suction or injection via HAM and HPM

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Frontiers of Mechanical Engineering 2014年第3期9卷 270-280页

作者： d. d. ganji M. ABBASI J. RAHIMI M. GHOLAMI I. RAHIMIPETROUdI department of Mechanical Engineering Babol University of Technology Babol Iran department of Mechanical Engineering Sari Branch Islamic AzadUniversity Sari Iran department of Electrical and Computer Engineering Babol Universityof Technology Babol Iran department of Mechanical Engineering College of Mechanic TehranScience and Research Branch Islamic Azad University Darnavand Iran

An analysis has been performed to study the problem of magneto-hydrodynamic （MHd） squeeze flow of an electrically conducting fluid between two infinite, parallel disks. The analytical methods called Homotopy Analysis Method （HAM） and Homotopy Perturbation Method （HPM） have been used to solve nonlinear differential equations. It has been attempted to show the capabilities and wide-range applications of the proposed methods in comparison with a type of numerical analysis as Boundary Value Problem （BVP） in solving this problem. Also, the velocity fields have been computed and shown graphically for various values of physical parameters. The objective of the present work is to investigate the effect of squeeze Reynolds number, Hartmann number and the suction/injection parameter on the velocity field. Furthermore, the results reveal that HAM and HPM are very effective and convenient.

关键词： Homotopy Analysis Method Homotopy Perturbation Method incompressible flow magneto-hydrodynamic flow parallel disks