FLOW OF COUPLE STRESS FLUID IN CONTACT WITH A NEWTONIAN FLUID IN AN INCLINED CHANNEL BOUNDED BY PERMEABLE BEDS

Sreenadh S 1, Nanda Kishore S 2 and Srinivas A N S 3
1 Department of Mathematics, Sri Venkateswara University, Tirupati, A.P., India
2Department of Mathematics, Priyadarshini College of Engineering and Technology, Nellore, A.P.
3School of Advanced Sciences, VIT University, Vellore – 632 014, TN, India


Abstract: The problem of steady laminar fully developed flow and heat transfer in an inclined channel consisting of a couple-stress fluid sandwiched between two Newtonian fluids with permeable beds is investigated. The flow in the permeable beds is governed by Darcy’s law. The closed form solutions are obtained for the velocity and temperature fields in the channel. The effect of permeability on the velocity and temperature is discussed. We observed that for a given y, the velocity increases with increasing Darcy number and for a given y, the temperature increases with increasing couple stress parameter a.

Keywords: couple-stress fluid, Newtonian fluid, inclined channel, permeable bed.

FORESEEABLE DEMAND OF SOLAR ENERGY PERSPECTIVE BANGLADESH

Muhammad Jahidul Hoque 1, Md Jahidul Islam Razan 2, Md Didarul Islam 1
1 Department of Mechanical Engineering, BUET, Dhaka ,Bangladesh
2Department of EEE ,IUT, Gazipur ,Dhaka, Bangladesh


Abstract: Exhaustion of conventional sources of energy, environmental degradation caused by the burning of fossil fuels and the ongoing energy crisis has driven the need to explore alternative and sustainable sources of energy. Solar energy is such an enormous potential in this regard, that its one minute radiation surpasses the amount of energy the world has used since the time began. As a developing country, Bangladesh is encountering a great difficulty in supplying sufficient energy to maintain its economic growth. The current demand for energy exceeds the available resources and this gap is projected to increase further in a significant proportion in the near future. This paper presents a comprehensive study of the contemporary energy scenario and its foreseeable growth in the country. It reflects on the energy resources and the problems caused by the various forms of energy. It analyzes the prospect of solar energy, its advantages over other sources, the current scenario of it and its growth trend in Bangladesh.

Keywords: Photovoltaic (PV) systems ,Solar home systems ,Crystalline silicon solar cell, Thin film photovoltaic.

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