In this paper, heat transfer characteristics of a two-dimensional steady hydromagnetic natural convection flow of a micropolar fluid passed a non-linear stretching sheet taking into account the effects of a temperature-dependent viscosity and variable wall temperature are studied numerically for local similarity solutions by applying the Nachtsheim-Swigert iteration method. The results corresponding to the dimensionless temperature profiles and the local rate of heat transfer are displayed graphically for important material parameters. The results show that in modeling the thermal boundary layer flow with a temperature-dependent viscosity, consideration of the Prandtl number as a constant within the boundary layer produces unrealistic results and therefore it must be treated as a variable rather than a constant within the boundary layer. The results also show that the local rate of heat transfer strongly depends on the non-linear stretching index and temperature index.

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The problem of combined free-forced convection and mass transfer flow over a vertical porous flat plate, in presence of heat generation and thermaldiffusion, is studied numerically. The non-linear partial differential equations and their boundary conditions, describing the problem under consideration, are transformed into a system of ordinary differential equations by using usual similarity transformations. This system is solved numerically by applying Nachtsheim-Swigert shooting iteration technique together with Runge-Kutta sixth order integration scheme. The effects of suction parameter, heat generation parameter and Soret number are examined on the flow field of a hydrogen-air mixture as a non-chemical reacting fluid pair. The analysis of the obtained results showed that the flow field is significantly influenced by these parameters.

Unsteady MHD free convection and mass transfer flow through a vertical oscillatory porous plate with hall, ion-slip currents and heat source in a rotating system are studied. The governing equations of the problem contain a system of non-linear coupled partial differential equations. The coupled non-linear partial differential equations are solved by explicit finite difference method and the numerical results have been calculated by Compaq Visual 6.6a. For good accuracy, stability and convergence analysis have been analyzed. The results of this investigation are discussed for the different values of the well-known parameters and are shown graphically.

Soon after the partition of the subcontinent in 1947, India took initiative to construct a barrage on its side of the Ganges and commissioned it in 1975. In the past few decades, many of the 54 Bangladeshi Rivers that originate in India have either been diverted or dammed upstream, inside India. All of these hydro-developmental initiatives have left a profound impact on Bangladesh as it is at the receiving end of the Himalayan fluvial regime. In particular, Bangladesh’s agriculture, fisheries, and human health and wellbeing are reported to have been significantly affected by the disruption of natural water flow in its rivers. The debate over the water sharing issues between India and Bangladesh dates back as early as their birth but the historical developments of the disputes have never been adequately addressed in settling the issues. This paper analyzes the political developments in Bangladesh and India over Farakka issue from historical perspectives. It also reveals the adverse effects of Farakka Barrage on environment in Bangladesh. The aim is to provide policy makers with the insights into historical developments of disputes centred on Farakka Barrage to contribute towards better water governance.