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A Mathematical Model for Studying the Slip Effect on Peristaltic Motion with Heat and Mass Transfer

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Chinese Physics Letters 2011年第3期28卷 120-123页

作者： Tasawar Hayat Najma Saleem Awatif A.hendi Department of Mathematics Quaid-i-Azam University Islamabad 44000Pakistan Department of Physics Faculty of SciencesKing Saud UniversityP.O.Box 1846Riyadh 11321Saudi Arabia

A mathematical model is presented with an interest to examine the peristaltic motion in an asymmetric channel by taking into account the slip,heat and mass *** relationships for a micropolar fluid are *** solution procedure for nonlinear analysis is given under long wavelength and low Reynolds number *** effects of sundry parameters entering into the expressions of axial velocity,temperature and concentration are *** and trapping phenomena are discussed.

关键词： Mathematical trapping asymmetric

Time-dependent three-dimensional flow and mass transfer of elastico-viscous fluid over unsteady stretching sheet

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Applied Mathematics and Mechanics(English Edition) 2011年第2期32卷 167-178页

作者： T.HAYAT M.MUSTAFA A.A.hendi Department of Mathematics Quaid-I-Azam University Department of Physics Faculty of ScienceKing Saud University

This article studies the three-dimensional boundary layer flow of an elastico- viscous fluid over a stretching surface. Velocity of the stretching sheet is assumed to be time-dependent. Effect of mass transfer with higher order chemical reaction is further considered. Computations are made by the homptopy analysis method （HAM）. Con- vergence of the obtained series solutions is explicitly analyzed. Variations of embedding parameters on the velocity and concentration are graphically discussed. Numerical com- putations of surface mass transfer are reported. Comparison of the present results with the numerical solutions is also given.

关键词： unsteady flow mass transfer viscoelastic fluid homptopy analysis methodsolution

Peristaltic Motion of Power-Law Fluid with Heat and Mass Transfer

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Chinese Physics Letters 2011年第8期28卷 183-186页

作者： T.Hayat S.Hina AwatifA.hendi Department of Mathematics Quaid-I-Azam University 45320Islamabad 44000Pakistan Department of Physics Faculty of ScienceKing Saud UniversityP.O.Box 1846Riyadh 11328Saudi Arabia

The effects of wall properties and heat and mass transfer on the peristalsis in a power-law fluid are *** solutions for the stream function,temperature,concentration and heat transfer coefficient are *** axial velocit... 详细信息

关键词： parameters transfer coefficient

Exact solution of electroosmotic flow in generalized Burgers fluid

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Applied Mathematics and Mechanics(English Edition) 2011年第9期32卷 1119-1126页

作者： T.HAYAT S.AFZAL A.hendi Department of Mathematics Quaid-i-Azam University Department of Mathematics King Saud University Department of Physics Faculty of ScienceKing Saud University

An exact solution is developed for the time periodic electroosmotic flow of a non-Newtonian fluid between the micro-parallel *** constitutive equations of a generalized Burgers fluid are used in the mathematical *** resulting problem is solved by a Fourier transform *** are plotted and discussed for various emerging parameters of interest.

关键词： generalized Burgers fluid periodic flow Fourier transform

Heat Transfer Analysis for Peristaltic Mechanism in Variable Viscosity Fluid

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Chinese Physics Letters 2011年第4期28卷 130-132页

作者： T.Hayat F.M.Abbasi Awatif A.hendi Department of Mathematics Quaid-I-Azam University 45320Islamabad 44000Pakistan Department of Physics Faculty of ScienceKing Saud UniversityP.O.Box 1846Riyadh 11321Saudi Arabia

An analysis is carried out for a peristaltic flow of a third-order fluid with heat transfer and variable viscosity when no-slip condition does not *** solution is discussed and a comparative stuity between the cases o... 详细信息

关键词： viscosity flow constant

A new aluminum iron oxide Schottky photodiode designed via sol-gel coating method

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Chinese Physics B 2014年第5期23卷 563-567页

作者： A.Tataroglu A.A.hendi R.H.Alorainy F.Yakuphanoglu Department of Physics Faculty of ScienceGazi University Physics Department Sciences Faculty for GirlsKing Abdulaziz University Department of Physics Faculty of ScienceF?rat University

A novel aluminum iron oxide （Al/AlFe2O4/p-Si） Schottky photodiode was successfully fabricated via the sol-gel coating process. The microstructure of the spinel ferrite （AlFe2O4） was examined by atomic force microscopy. The current-voltage characteristics of the fabricated photodiode were studied under dark and different illumination conditions at room temperature. By using the thermionic emission theory, the forward bias I-V characteristics of the photodiode are analyzed to determine the main electrical parameters such as the ideality factor （n） and barrier height （ФB0） of the photodiode. The values of n and ФB0 for all conditions are found to be about 7.00 and 0.76 eV, respectively. In addition, the values of series resistance （Rs） are determined using Cheung＇s method and Ohm＇s law. The values of Rs and shunt resistance （Rsh） are decreased with the increase of illumination intensity. These new spinel ferrites will open a new avenue to other spinel structure materials for optoelectronic devices in the near future.

关键词： spinel ferrite Schottky photodiode I-V characteristics barrier height

Peristaltic flow of Walter’s B fluid in endoscope

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Applied Mathematics and Mechanics(English Edition) 2011年第6期32卷 689-700页

作者： S.NADEEM N.S.AKBAR T.HAYAT A.A.hendi Department of Mathematics Quaid-i-Azam University Department of Physics Faculty of ScienceKing Saud University

The peristaltic flow of a Walter＇s B fluid in an endoscope is studied. The problem is modeled in a cylindrical coordinate system. The main theme of the present analysis is to study the endoscopic effects on the peristaltic flow of the Waiter＇s B fluid. To the best of the authors＇ knowledge, no investigation has been made so far in the literatures to study the Walter＇s B fluid in an endoscope. Analytical solutions axe obtained using the regular perturbation method by taking 5 as a perturbation parameter. The approximate analytical solutions for the pressure rise and friction forces are evaluated using numerical integration. The effects of emerging parameters of the Waiter＇s B fluid are presented graphically.

关键词： peristaltic flow Walter's B fluid endoscope perturbation solution.

MHD stagnation point flow towards heated shrinking surface subjected to heat generation/absorption

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Applied Mathematics and Mechanics(English Edition) 2012年第5期33卷 631-648页

作者： T.HAYAT M.HUSSaiN A.A.hendi S.NADEEM Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan Department of Physics Faculty of ScienceKing Saud UniversityRiyadh 11321Saudi Arabia

The magnetohydrodynamic （MHD） stagnation point flow of micropolar flu- ids towards a heated shrinking surface is analyzed. The effects of viscous dissipation and internal heat generation/absorption are taken into account. Two explicit cases, i.e., the prescribed surface temperature （PST） and the prescribed heat flux （PHF）, are discussed. The boundary layer flow and energy equations are solved by employing the homotopy analysis method. The quantities of physical interest are examined through the presenta- tion of plots/tabulated values. It is noticed that the existence of the solutions for high shrinking parameters is associated closely with the applied magnetic field.

关键词： stagnation point flow micropolar fluid shrinking sheet convergence ho-motopy analysis method

Exact solutions in generalized Oldroyd-B fluid

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Applied Mathematics and Mechanics(English Edition) 2012年第4期33卷 411-426页

作者： T. HAYAT S. ZaiB S. ASGHAR A. A. hendi Department of Mathematics Quaid-i-Azam University Department of Mathematics Comsats Institute of Information Technology Department of Physics Faculty of Science King Saud University

This investigation deals with the influence of slip condition on the magne- tohydrodynamic （MHD） and rotating flow of a generalized Oldroyd-B （G. Oldroyd-B） fluid occupying a porous space. FractionM calculus approach is used in the mathematical modeling. Three illustrative examples induced by plate oscillations and periodic pressure gradient are considered, and the exact solutions in each case are derived. Comparison is provided between the results of slip and no-slip conditions. The influence of slip is highlighted on the velocity profile by displaying graphs.

关键词： slip condition exact solution fractional calculus