Browsing by Author "Alam, Shariful"

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    Effects Of Thermophoresis And Brownian Motion On Unsteady Forced Convective Flow Of A Nanofluid Along A Porous Wedge With Variable Suction
    (Research gate, 2015-10-10) Alam, Shariful; Sarower, Farhana; Rahman, M. M.; Uddin, Md. Jashim
    This paper deals a numerical study of unsteady two-dimensional laminar forced convective hydrodynamic heat and mass transfer flow of a nanofluid along a porous wedge. The model incorporates the effects of thermophoresis and Brownian motion in the presence of variable suction. The dimensionless local similarity equations governing the model are solved by applying Nachtsheim-Swigert shooting iteration technique along with sixth order Runge-Kutta integration scheme. The simulated results are displayed graphically as well as in a tabular form for various values of the model parameters. The obtained numerical results indicate that the flow, temperature and nanoparticles volume fraction are significantly influenced by these parameters. Nanofluids have novel properties those make them potentially useful in many applications in heat and mass transfer. The present model is greatly influenced by the thermophoresis and Brownian motion; thus, can be applied in solving engineering and physical problems related to these mechanisms.
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    Mathematical Modelling for Heat Transfer of a Micropolar Fluid along a Permeable Stretching/Shrinking Wedge with Heat Generation/Absorption
    (IIETA, 2016-03) Alam, Shariful; Islam, T.; Uddin, Md. Jashim
    In this paper, we have developed a mathematical model for the problem of unsteady hydromagnetic two dimensional flow and heat transfer of a viscous incompressible micropolar fluid over a heated permeable linearly stretching/shrinking wedge with heat generation/absorption. A set of similarity parameters is employed to convert the governing nonlinear partial differential equations into ordinary differential equations which are solved numerically using Nachtsheim-Swigert shooting iteration technique along with sixth order Runge-Kutta integration scheme. Comparisons with previously published work are performed and the results are found to be in excellent agreement. Numerical results are presented through graphs and tables and discussed them from the physical point of view. It is observed that the local skin friction coefficient (rate of shear stress) increases with the increase of the magnetic field parameter and the rate of heat transfer increases with the increase of the heat generation parameter. Full Text Link: http://doi.org/10.18280/mmep.030101/
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    Visualization in participatory program (VIPP)
    (BRAC University, 2006-12) Rakib-Ul-Hoque; Alam, Shariful; Muntahi, Abdussamad Ahmed
    We use several programming language for our project. like we use MySQL server for the database system. For the SMS sending and receiving we use ActiveXpert software. For report generating we use Crystal report. We use string matching algorithm for the opinions grouping. We have a server which is used for SMS sending and receiving. When all the SMS comes to the server they store into the server and using the subgroups all the opinions grouped. The subgroups are selected by the client who asks the questions. The client selects some subgroups which is related with the opinions. After matching all the opinions they grouped and the automated report generate which is the summery of all the opinions.