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| 1 | Boundary layer flow of third grade nanofluid with Newtonian heating and viscous dissipation显示文摘Two-dimensional boundary layer flow of an incompressible third grade nanofluid over a stretching surface is investigated.Influence of thermophoresis and Brownian motion is considered in the presence of Newtonian heating and viscous dissipation.Governing nonlinear problems of velocity, temperature and nanoparticle concentration are solved via homotopic procedure.Convergence is examined graphically and numerically. Results of temperature and nanoparticle concentration are plotted and discussed for various values of material parameters, Prandtl number, Lewis number, Newtonian heating parameter, Eckert number and thermophoresis and Brownian motion parameters. Numerical computations are performed. The results show that the change in temperature and nanoparticle concentration distribution functions is similar when we use higher values of material parameters β1 andβ2. It is seen that the temperature and thermal boundary layer thickness are increasing functions of Newtonian heating parameter γ.An increase in thermophoresis and Brownian motion parameters tends to an enhancement in the temperature. | S.A.Shehzad Tariq Hussain T.Hayat M.Ramzan A.Alsaedi | 2015 | Journal of Central South University2015，22，1： | 8 |
| 2 | Convective heat and mass transfer in MHD mixed convection flow of Jeffrey nanofluid over a radially stretching surface with thermal radiation显示文摘Mixed convection flow of magnetohydrodynamic(MHD) Jeffrey nanofluid over a radially stretching surface with radiative surface is studied. Radial sheet is considered to be convectively heated. Convective boundary conditions through heat and mass are employed. The governing boundary layer equations are transformed into ordinary differential equations. Convergent series solutions of the resulting problems are derived. Emphasis has been focused on studying the effects of mixed convection, thermal radiation, magnetic field and nanoparticles on the velocity, temperature and concentration fields. Numerical values of the physical parameters involved in the problem are computed for the local Nusselt and Sherwood numbers are computed. | M.BILAL ASHRAF T.HAYAT A.ALSAEDI S.A.SHEHZAD | 2015 | Journal of Central South University2015，22，3： | 6 |
| 3 | Mixed convective heat and mass transfer analysis for peristaltic transport in an asymmetric channel with Soret and Dufour effects显示文摘The present investigation addresses the simultaneous effects of heat and mass transfer in the mixed convection peristaltic flow of viscous fluid in an asymmetric channel. The channel walls exhibit the convective boundary conditions. In addition, the effects due to Soret and Dufour are taken into consideration. Resulting problems are solved for the series solutions. Numerical values of heat and mass transfer rates are displayed and studied. Results indicate that the concentration and temperature of the fluid increase whereas the mass transfer rate at the wall decreases with increase of the mass transfer Biot number. Furthermore, it is observed that the temperature decreases with the increase of the heat transfer Biot number. | F.M.Abbasi A.Alsaedi T.Hayat | 2014 | Journal of Central South University2014，21，12： | 5 |
| 4 | Flow of Casson nanofluid with viscous dissipation and convective conditions: A mathematical model显示文摘The magnetohydrodynamic(MHD) boundary layer flow of Casson fluid in the presence of nanoparticles is investigated.Convective conditions of temperature and nanoparticle concentration are employed in the formulation. The flow is generated due to exponentially stretching surface. The governing boundary layer equations are reduced into the ordinary differential equations. Series solutions are presented to analyze the velocity, temperature and nanoparticle concentration fields. Temperature and nanoparticle concentration fields decrease when the values of Casson parameter enhance. It is found that the Biot numbers arising due to thermal and concentration convective conditions yield an enhancement in the temperature and concentration fields. Further, we observed that both the thermal and nanoparticle concentration boundary layer thicknesses are higher for the larger values of thermophoresis parameter. The effects of Brownian motion parameter on the temperature and nanoparticle concentration are reverse. | T.HUSSAIN S.A.SHEHZAD A.ALSAEDI T.HAYAT M.RAMZAN | 2015 | Journal of Central South University2015，22，3： | 4 |
| 5 | Stagnation-point flow of couple stress fluid with melting heat transfer显示文摘Melting heat transfer in the boundary layer flow of a couple stress fluid over a stretching surface is investigated. The developed differential equations are solved for homotopic solutions. It is observed that the velocity and the boundary layer thickness are decreasing functions of the couple stress fluid parameter. However, the temperature and surface heat transfer increase when the values of the couple stress fluid parameter increase. The velocity and temperature fields increase with an increase in the melting process of the stretching sheet. | T.HAYAT M.MUSTAFA Z.IQBAL A.ALSAEDI | 2013 | Applied Mathematics and Mechanics(English Edition)2013，34，2： | 3 |
| 6 | MHD flow of nanofluids over an exponentially stretching sheet in a porous medium with convective boundary conditions显示文摘This article concentrates on the steady magnetohydrodynamic(MHD) flow of viscous nanofluid. The flow is caused by a permeable exponentially stretching surface. An incompressible fluid fills the porous space. A comparative study is made for the nanoparticles namely Copper(Cu), Silver(Ag), Alumina(Al2O3) and Titanium Oxide(TiO2). Water is treated as a base fluid. Convective type boundary conditions are employed in modeling the heat transfer process. The non-linear partial differential equations governing the flow are reduced to an ordinary differential equation by similarity transformations. The obtained equations are then solved for the development of series solutions. Convergence of the obtained series solutions is explicitly discussed. The effects of different parameters on the velocity and temperature profiles are shown and analyzed through graphs. | T.Hayat M.Imtiaz A.Alsaedi R.Mansoor | 2014 | Chinese Physics B2014，23，5： | 3 |
| 7 | Mixed Convection Stagnation Point Flow of Casson Fluid with Convective Boundary Conditions显示文摘The mixed convection stagnation-point flow of an incompressible non-Newtonian fluid over a stretching sheet under convective boundary conditions is investigated.Mathematical formulation is presented for a Casson fluid.The resulting partial differential equations are converted into the ordinary differential equations by the suitable transformations.The velocity and temperature profiles are computed by employing the homotopy analysis method.The plotted graphs illustrate the flow and heat transfer characteristics and their dependence upon the embedded parameters.Numerical values of skin-friction coefficient and Nusselt number are given and examined.Comparison of the present results with the existing solution is also given. | T.Hayat S.A.Shehzad A.Alsaedi M.S.Alhothuali | 2012 | Chinese Physics Letters2012，29，11： | 3 |
| 8 | Heat transfer analysis in peristaltic flow of MHD Jeffrey fluid with variable thermal conductivity显示文摘The effect of an inclined magnetic field in the peristaltic flow of a Jeffrey fluid with variable thermal conductivity is discussed. The temperature dependent thermal conductivity of fluid in an asymmetric channel is taken into account. A dimensionless nonlinear system subject to a long wavelength and a low Reynolds number is solved.The explicit expressions of the stream function, the axial velocity, the pressure gradient,and the temperature are obtained. The effects of all physical parameters on peristaltic transport and heat transfer characteristics are observed from graphical illustrations. The behaviors of θ∈ [0, π/2] and θ∈ [π/2, π] on fluid flow and heat transfer are found to be opposite. Further, the size of trapped bolus is greater for the case of the inclined magnetic field(θ = π/2) than that for the case of the transverse magnetic field(θ = π/2). The heat transfer coefficient decreases when the constant thermal conductivity(Newtonian)fluid is changed to the variable thermal conductivity(Jeffrey) fluid. | Q.HUSSAIN S.ASGHAR T.HAYAT A.ALSAEDI | 2015 | Applied Mathematics and Mechanics(English Edition)2015，36，4： | 3 |
| 9 | Heat transfer in a porous saturated wavy channel with asymmetric convective boundary conditions显示文摘The viscous flow in a wavy channel with convective boundary conditions is investigated. The channel is filled with a porous viscous fluid. Two cases of equal and different external convection coefficients on the walls are taken into account. Effect of viscous dissipation is also considered. The governing equations are derived employing long wavelength and low Reynolds number approximations. Exact closed form solutions are obtained for the simplified equations. Important physical features for peristaltic flow caused by the wavy wave are pumping, trapping and heat transfer rate at the channel walls. These are discussed one by one in depth and detail through graphical illustrations. Special attention has been given to the effects of convective boundary conditions. The results show that for Bi1≠Bi2, there exists a critical value of Brinkman number Brc at which the temperatures of both the walls become equal. And, for Bi1>Bi2 and Br>Brc, the temperature of the cold wall exceeds the temperature of hot wall. | Q.Hussain S.Asghar T.Hayat A.Alsaedi | 2015 | Journal of Central South University2015，22，1： | 2 |
| 10 | Melting heat transfer in Cu-water and Ag-water nanofluids flow with homogeneous-heterogeneous reactions显示文摘This article addresses melting heat transfer in magnetohydrodynamics(MHD)nanofluid flows by a rotating disk. The analysis is performed in Cu-water and Ag-water nanofluids. Thermal radiation, viscous dissipation, and chemical reactions impacts are added in the nanofluid model. Appropriate transformations lead to the nondimensionalized boundary layer equations. Series solutions for the resulting equations are computed.The role of pertinent parameters on the velocity, temperature, and concentration is analyzed in the outputs. It is revealed that the larger melting parameter enhances the velocity profile while the temperature profile decreases. The surface drag force and heat transfer rate are computed under the influence of pertinent parameters. Furthermore, the homogeneous reaction parameter serves to decrease the surface concentration. | M.IMTIAZ F.SHAHID T.HAYAT A.ALSAEDI | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，4： | 2 |
| 11 | Flow of Burgers' fluid over an inclined stretching sheet with heat and mass transfer显示文摘Effects of heat and mass transfer in the flow of Burgers fluid over an inclined sheet are discussed. Problems formulation and relevant analysis are given in the presence of thermal radiation and non-uniform heat source/sink. Thermal conductivity is taken temperature dependent. The nonlinear partial differential equations are simplified using boundary layer approximations. The resultant nonlinear ordinary differential equations are solved for the series solutions. The convergence of series solutions is obtained by plotting theη-curves for the velocity, temperature and concentration fields. Results of this work describe the role of different physical parameters involved in the problem. The Deborah numbers corresponding to relaxation time(β1 and β2) and angle of inclination(α) decrease the fluid velocity and concentration field. Concentration field decays as Deborah numbers corresponding to retardation time(β3) and mixed convection parameter(G) increase. Large values of heat generation/absorption parameters A/B, and the temperature distribution across the boundary layer increase. Numerical values of local Nusselt number,-θ′(0), and local Sherwood number,-f′(0), are computed and analyzed. It is found that θ′(0) increases with an increase in β3. | T.Hayat Sadia Asad A.Alsaedi | 2015 | Journal of Central South University2015，22，8： | 2 |
| 12 | 霍尔效应和欧姆热效应下纳米流体通过弯曲通道时的蠕动(英文)显示文摘纳米流体以其优异的热物理性质吸引了许多科学家。在常规流体中加入少量的纳米粒子会显著地增强传热特性。纳米材料的可持续性和效率对纳米技术的进步具有关键作用。本文分析了霍尔效应、欧姆热效应和速度滑移对纳米流体蠕动的影响。考虑了对流边界条件和热的产生/吸收,以促进传热特性。在曲线坐标下导出了弯曲通道中蠕动的控制方程。在长波长和小雷诺数的假设条件下,对方程进行了数值求解。研究表明,纳米流体提高了传热速率,降低了流体温度。Hartman数和Hall参数在流体运动和传热特性上表现出相反的行为。在存在速度滑移的情况下,压力梯度迅速减小,在通道的狭小区域表现出主导作用。 | T.HAYAT B.AHMED F.M.ABBASI A.ALSAEDI | 2019 | Journal of Central South University2019，26，9： | 2 |
| 13 | Peristaltic flow of couple stress fluid through uniform porous medium显示文摘Investigation concerning peristaltic motion of couple stress fluid is made. An incompressible couple stress fluid occupies the porous medium. Mathematical analysis is presented through large wavelength and low Reynolds number. Exact analytical expressions of axial velocity, volume flow rate, pressure gradient, and stream function are calculated as a function of couple stress parameter. The essential feature of the analysis is a full description of influence of couple stress parameter and permeability parameter on the pressure, frictional force, mechanical efficiency, and trapping. | A.ALSAEDI N.ALI D.TRIPATHI T.HAYAT | 2014 | Applied Mathematics and Mechanics(English Edition)2014，35，4： | 2 |
| 14 | MHD stagnation point flow by a permeable stretching cylinder with Soret-Dufour effects显示文摘Combined effects of Soret(thermal-diffusion) and Dufour(diffusion-thermo) in MHD stagnation point flow by a permeable stretching cylinder were studied. Analysis was examined in the presence of heat generation/absorption and chemical reaction. The laws of conservation of mass, momentum, energy and concentration are found to lead to the mathematical development of the problem. Suitable transformations were used to convert the nonlinear partial differential equations into the ordinary differential equations. The series solutions of boundary layer equations through momentum, energy and concentration equations were obtained.Convergence of the developed series solutions was discussed via plots and numerical values. The behaviors of different physical parameters on the velocity components, temperature and concentration were obtained. Numerical values of Nusselt number, skin friction and Sherwood number with different parameters were computed and analyzed. It is found that Dufour and Soret numbers result in the enhancement of temperature and concentration distributions, respectively. | M.Ramzan M.Farooq T.Hayat A.Alsaedi J.Cao | 2015 | Journal of Central South University2015，22，2： | 2 |
| 15 | Diffusion of chemically reactive species in third grade fluid flow over an exponentially stretching sheet considering magnetic field effects显示文摘This article addresses the magnetohydrodynamics(MHD) flow of a third grade fluid over an exponentially stretching sheet. Analysis is carried out in the presence of first order chemical reaction. Both cases of constructive and destructive chemical reactions are reported. Convergent solutions of the resulting differential systems are presented in series forms. Characteristics of various sundry parameters on the velocity, concentration, skin friction and local Sherwood number are analyzed and discussed. | T.Hayat M.Ijaz Khan M.Waqas A.Alsaedi T.Yasmeen | 2017 | Chinese Journal of Chemical Engineering2017，25，3： | 2 |
| 16 | Peristaltic flow of Johnson-Segalman fluid in asymmetric channel with convective boundary conditions显示文摘This work is concerned with the peristaltic transport of the JohnsonSegalman fluid in an asymmetric channel with convective boundary conditions. The mathematical modeling is based upon the conservation laws of mass, linear momentum,and energy. The resulting equations are solved after long wavelength and low Reynolds number are used. The results for the axial pressure gradient, velocity, and temperature profiles are obtained for small Weissenberg number. The expressions of the pressure gradient, velocity, and temperature are analyzed for various embedded parameters. Pumping and trapping phenomena are also explored. | H.YASMIN T.HAYAT A.ALSAEDI H.H.ALSULAMI | 2014 | Applied Mathematics and Mechanics(English Edition)2014，35，6： | 1 |
| 17 | Flow of variable thermal conductivity fluid due to inclined stretching cylinder with viscous dissipation and thermal radiation显示文摘The aim of the present study is to investigate the flow of the Casson fluid by an inclined stretching cylinder. A heat transfer analysis is carried out in the presence of thermal radiation and viscous dissipation effects. The temperature dependent thermal conductivity of the Casson fluid is considered. The relevant equations are first simplified under usual boundary layer assumptions, and then transformed into ordinary differential equations by suitable transformations. The transformed ordinary differential equations are computed for the series solutions of velocity and temperature. A convergence analysis is shown explicitly. Velocity and temperature fields are discussed for different physical parameters by graphs and numerical values. It is found that the velocity decreases with the increase in the angle of inclination while increases with the increase in the mixed convection parameter. The enhancement in the thermal conductivity and radiation effects corresponds to a higher fluid temperature. It is also found that heat transfer is more pronounced in a cylinder when it is compared with a flat plate. The thermal boundary layer thickness increases with the increase in the Eckert number. The radiation and variable thermal conductivity decreases the heat transfer rate at the surface. | T.HAYAT S.ASAD A.ALSAEDI | 2014 | Applied Mathematics and Mechanics(English Edition)2014，35，6： | 1 |
| 18 | Convective heat and mass transfer effects in three-dimensional flow of Maxwell fluid over a stretching surface with heat source显示文摘Heat and mass transfer effects in three-dimensional flow of Maxwell fluid over a stretching surface were addressed.Analysis was performed in the presence of internal heat generation/absorption. Concentration and thermal buoyancy effects were accounted. Convective boundary conditions for heat and mass transfer analysis were explored. Series solutions of the resulting problem were developed. Effects of mixed convection, internal heat generation/absorption parameter and Biot numbers on the dimensionless velocity, temperature and concentration distributions were illustrated graphically. Numerical values of local Nusselt and Sherwood numbers were obtained and analyzed for all the physical parameters. It is found that both thermal and concentration boundary layer thicknesses are decreasing functions of stretching ratio. Variations of mixed convection parameter and concentration buoyancy parameter on the velocity profiles and associated boundary layer thicknesses are enhanced. Velocity profiles and temperature increase in the case of internal heat generation while they reduce for heat absorption. Heat transfer Biot number increases the thermal boundary layer thickness and temperature. Also concentration and its associated boundary layer are enhanced with an increase in mass transfer Biot number. The local Nusselt and Sherwood numbers have quite similar behaviors for increasing values of mixed convection parameter, concentration buoyancy parameter and Deborah number. | T.Hayat M.Bilal Ashraf A.Alsaedi S.A.Shehzad | 2015 | Journal of Central South University2015，22，2： | 1 |
| 19 | Flow of Casson fluid with nanoparticles显示文摘The boundary layer flow of a Casson fluid due to a stretching cylinder is discussed in the presence of nanoparticles and thermal radiation.All physical properties of the Casson fluid except the thermal conductivity are taken constant.Appropriate transformations yield the nonlinear ordinary differential systems.Convergent series solutions are developed and analyzed.The numerical results for the local Nusselt and Sherwood numbers are demonstrated.It is found that an increase in the strength of the Brownian motion decays the temperature noticeably.However,the rate of heat transfer and the concentration of the nanoparticles at the surface increase for larger Brownian motion parameters. | T.HAYAT S.ASAD A.ALSAEDI | 2016 | Applied Mathematics and Mechanics(English Edition)2016，37，4： | 1 |
| 20 | A Novel Control Algorithm for Interaction Between Surface Waves and A Permeable Floating Structure显示文摘An analytical solution is undertaken to describe the wave-induced flow field and the surge motion of a permeable platform structure with fuzzy controllers in an oceanic environment.In the design procedure of the controller,a parallel distributed compensation(PDC) scheme is utilized to construct a global fuzzy logic controller by blending all local state feedback controllers.A stability analysis is carried out for a real structure system by using Lyapunov method.The corresponding boundary value problems are then incorporated into scattering and radiation problems.They are analytically solved,based on separation of variables,to obtain series solutions in terms of the harmonic incident wave motion and surge motion.The dependence of the wave-induced flow field and its resonant frequency on wave characteristics and structure properties including platform width,thickness and mass has been thus drawn with a parametric approach.From which mathematical models are applied for the wave-induced displacement of the surge motion.A nonlinearly inverted pendulum system is employed to demonstrate that the controller tuned by swarm intelligence method can not only stabilize the nonlinear system,but has the robustness against external disturbance. | Pei-Wei TSAI A.ALSAEDI T.HAYAT Cheng-Wu CHEN | 2016 | China Ocean Engineering2016，30，2： | 1 |
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