Islamic University of Technology
Dhaka, Bangladesh

Islamic University of Technology or IUT is an educational and research institution in Bangladesh run and funded by OIC. It is regarded as one of the prestigious institutions for engineering and technical education in Bangladesh. The main objective of IUT is to contribute in developing the human resources of the member states of the OIC, particularly in the fields of Engineering, Technology and Technical Education. IUT receives direct endowment from OIC member countries and offers scholarships to its students in the form of free tuition, boarding, lodging and medicare. The aesthetic campus was designed by Turkish architect Pamir Mehmet, an MIT graduate. Wikipedia.

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Kandelousi M.S.,Islamic University of Technology | Ellahi R.,FBAS | Ellahi R.,University of California at Riverside
Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences | Year: 2015

Influence of a spatially varying magnetic field on Fe3O4-plasma nanofluid flow in a vessel as a targeted drug delivery system is investigated. Combined effects of ferrohydrodynamic (FHD) and magnetohydrodynamic (MHD) are considered in mathematic models. The lattice Boltzmann method is applied to solve the governing equations. Effects of active parameters, such as the Reynolds number and magnetic number on the flow characteristics, have been examined. Results indicate that the presence of the magnetic field affects considerably the flow field. Back flow occurs near the region where the magnetic source is located. Also, it can be found that the skin friction coefficient is a decreasing function of the Reynolds number and magnetic number.

Rahman M.S.,Bangladesh Atomic Energy Commission | Molla A.H.,University of Rajshahi | Saha N.,University of Rajshahi | Rahman A.,Islamic University of Technology
Food Chemistry | Year: 2012

Concentrations of eight heavy metals (Pb, Cd, Ni, Cr, Cu, Zn, Mn, and As) in the muscles of ten species of fish collected from Bangshi River at Savar in Bangladesh were measured in two different seasons. The concentrations of the studied heavy metals, except Pb in Corica soborna, were found to be below the safe limits suggested by various authorities and thus gave no indication of pollution. The present study also showed that, Zn was the most and Cd was the least accumulated metal in the studied fish muscles. ANOVA analysis clearly revealed that there was a significant variation (CI = 95%) of the heavy metal concentrations in different fish species in the Bangshi River. Significant positive correlations between the heavy metal concentrations in fish muscles were also observed in both seasons. From the human health point of view, this study showed that there was no possible health risk to consumers due to intake of studied fishes under the current consumption rate. © 2012 Elsevier Ltd. All rights reserved.

Sheikholeslami M.,Islamic University of Technology | Rashidi M.M.,Tongji University | Rashidi M.M.,ENN TongjiClean EnergyInstitute of Advanced Studies
Journal of the Taiwan Institute of Chemical Engineers | Year: 2015

Effect of spatially variable magnetic field on ferrofluid flow and heat transfer is investigated. The enclosure is filled with Fe3O4-water nanofluid. Control volume based finite element method (CVFEM) is applied to solve the governing equations. The combined effects of ferrohydrodynamic and magnetohydrodynamic have been taken into account. The influences of Magnetic number, Hartmann number, Rayleigh number and nanoparticle volume fraction on the flow and heat transfer characteristics have been examined. Results show that enhancement in heat transfer decrease with increase of Rayleigh number while for two other active parameters different behavior is observed. Also it can be concluded that Nusselt number is an increasing function of Magnetic number, Rayleigh number and nanoparticle volume fraction while it is a decreasing function of Hartmann number. © 2015 Taiwan Institute of Chemical Engineers.

Amin M.R.,Islamic University of Technology | Ogura K.,Niigata University
IEEE Transactions on Plasma Science | Year: 2013

The temporal growth rate (TGR) in a trapezoidally corrugated slow-wave structure for a backward-wave oscillator is theoretically studied. An intense relativistic annular electron is used as the energy source for the device. The annular electron beam is assumed to be infinitesimally thin in the radial extent and guided by an infinitely strong magnetic field. The trapezoidal profile of the structure is approximated by a sinusoidal function using Fourier approximation, and the dispersion relation of the system is derived using the Rayleigh-Fourier method. To study the TGR of the electromagnetic wave inside the system, the dispersion equation is solved for different values of the beam parameters. The dimensions of sinusoidally corrugated comparable trapezoidal structure are determined by comparing their dispersion characteristics. For the TM01 mode, TGR of instability that gives a qualitative measure of the microwave generation is calculated. The peak TGR of the proposed structure is found to be on average 1.5% higher than that of the sinusoidally corrugated slow-wave structure for the same set of beam parameters. Apart from its improved growth rate, the proposed structure has an added advantage of easy fabrication. © 1973-2012 IEEE.

Alam Hossain Mondal M.,University of Bonn | Sadrul Islam A.K.M.,Islamic University of Technology
Renewable Energy | Year: 2011

The potential of grid-connected solar PV system in Bangladesh was estimated utilizing GeoSpatial toolkit, NASA SSE solar radiation data and HOMER optimization software. Financial viability of solar photovoltaic as an electricity generation source for Bangladesh was also assessed utilizing a proposed 1-MW grid-connected solar PV system using RETScreen simulation software for 14 widespread locations in Bangladesh. The technical potential of gird-connected solar PV in Bangladesh was calculated as about 50174 MW. The annual electricity generation of the proposed system varied depending on the location between 1653 MWh and 1854 MWh, with a mean value of 1729 MWh. Several different economic and financial indicators were calculated, such as the internal rate of return, net present value, benefit-cost ratio, cost of energy production and simple payback. All indicators - for all sites - showed favorable condition for development of the proposed solar PV system in Bangladesh. The results also showed that a minimum of 1423 tons of greenhouse gas emissions can be avoided annually utilizing the proposed system at any part of the country. © 2010 Elsevier Ltd.

Ahmed F.,Islamic University of Technology
Electronics Letters | Year: 2012

Presented is a novel local texture pattern, the gradient directional pattern (GDP), and an effective feature descriptor constructed with the GDP codes for facial expression recognition. The GDP operator encodes the texture information of a local region by quantising the gradient directional angles to form a binary pattern. The location and occurrence information of the GDP micro-patterns is then used as the facial feature descriptor. As the gradient operator can effectively enhance the edge information of an image, the resultant GDP features retain more information than grey-level based methods and describe the local image primitives in a more stable manner. Experiments with prototypic expression images from the Cohn-Kanade database shows the superiority of the GDP descriptor against some well-known appearance-based methods. © 2012 The Institution of Engineering and Technology.

Amin M.R.,Islamic University of Technology
IET Microwaves, Antennas and Propagation | Year: 2013

Slow wave structure (SWS) is the vital component of slow wave type high-power microwave (HPM) devices where the kinetic energy of an axially streaming electron beam is resonantly extracted to produce microwave radiation. The frequency of the generated microwave predominantly depends on the beam energy and the dispersion characteristics of the SWS. Many types of SWSs have been investigated and implemented in real experiments. Among them, cylindrical metallic structures with sinusoidally rippled inner wall have gained popularity in backward wave oscillators. To enhance the efficiency of the devices, prolonged and stable interaction of the EM wave with electron beam is important. One of the possible techniques to improve the performance of the devices could be the use of non-uniform SWS. In this study, a doubly rippled inner wall SWS is considered. The radius of the structure is varied sinusoidally with two periods. Using linear theory, the dispersion relation of the EM wave inside the structure in the absence of electron beam has been analysed numerically. It has been observed that a single band of the conventional sinusoidally rippled SWS is decomposed into several sub-bands depending on the ratio of the length of two periods. Some of the sub-bands are so flat that the frequency of the microwave radiation can be made insensitive to the beam energy fluctuation. © The Institution of Engineering and Technology 2013.

Sheikholeslami M.,Islamic University of Technology | Ganji D.D.,Islamic University of Technology
Journal of Applied Fluid Mechanics | Year: 2014

In this article, two-dimensional laminar-forced convection nanofluids flow over a stretching surface in a porous medium has been studied. The governing partial differential equations with the corresponding boundary conditions are reduced to a set of ordinary differential equations with the appropriate boundary conditions using similarity transformation, which is then solved numerically by the fourth order Runge-Kutta integration scheme featuring a shooting technique. Different models of nanofluid based on different formulas for thermal conductivity and dynamic viscosity are used. Different types of nanoparticles as copper, silver, alumina and titanium Oxide with water and Ethylene glycol as their base fluids has been considered. The influence of significant parameters such as nanoparticle volume fraction, kind of nanofluid, Magnetic parameter and Reynolds number on the flow and heat transfer characteristics is discussed. The influence of significant parameters such as Thermal conductivity parameter, volume fraction of the nanoparticles, Permeability parameter, suction/injection parameter and Velocity ratio parameter on the flow and heat transfer characteristics is discussed. It was found that choosing Titanium oxide as the nanoparticle and Ethylene glycol as base fluid proved to have the highest cooling performance for this problem.

Ahiduzzaman M.,Bangladesh Institute of Technology | Islam A.K.M.S.,Islamic University of Technology
Renewable and Sustainable Energy Reviews | Year: 2011

Bangladesh is an energy starving country. The country will be on one of the fast growing power markets with its population and growing energy demand per person, its fast growing urbanization, and its socio-economic development. At present the potential demand of power is 5569 MW and the supply is below 4000 MW. The country is dependent on the imported petroleum that is big burden on the economy. The per capita emission is only 0.2667 tonne per person still much below the world leading countries (19.8 tonne per person for USA). However, Bangladesh is one of the most vulnerable to climate change effect in the world. In this regard, renewable energy resources appear to be the one of the most efficient and effective solution for clean and sustainable energy development in Bangladesh. Biomass is the dominating source of energy in Bangladesh. Biomass energy is used in a very traditional way. Biomass conversion to energy in the form of liquid, gaseous and solid pellet or briquette could be a viable option to reduce the pressure on the conventional fossil fuel. The geographical location of Bangladesh has several advantages for extensive use of grid connected solar electricity and stand alone solar PV system. This article presents a review of the potential and utilization of the renewable energy sources in Bangladesh. © 2011 Elsevier Ltd. All rights reserved.

Bararnia H.,Islamic University of Technology | Hooman K.,University of Queensland | Ganji D.D.,Islamic University of Technology
Numerical Heat Transfer; Part A: Applications | Year: 2011

Numerical simulation of natural convection in a nanofluids-filled partitioned square cavity is presented. Two independent solvers, an in-house LBE-BGK code and the commercially available software CFD-ACE, are used to achieve this goal. While the partitioning plates are generating heat at a uniform temperature, the vertical walls are isothermally cooled allowing for the removal of the internally generated heat with the horizontal walls being adiabatic. While the particle volume fraction is kept constant at 5%, the effective Rayleigh number, the length, and the orientation of the partition have been parametrically varied from 103-107, 0.25H-0.75H, and horizontal to vertical, respectively. Copyright © Taylor & Francis Group, LLC.

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