Elements in the process of discovery

No Abstract. Global Journal of Humanities Vol. 6 (1&2) 2007: pp. 41-4

Heat and mass transfer in the unsteady hydromagnetic free-convection flow in a rotating binary fluid II

No Abstract

Influence of radiation on unsteady MHD free-convection flow of polar fluids past a continuously moving heated vertical plate in a porous medium

No Abstract.Global Journal of Pure and Applied Sciences Vol. 13 (2) 2007: pp. 265-27

Heat Transfer In Magnetohydrodynamic (Mhd) Couette Flow Of A Two-Component Plasma With Variable Wall Temperature

In this paper we study the field structure and the heat transfer at the walls of two-component plasma. The flow is induced by two horizontal walls moving relative to each other along their common axis in the presence of a uniformly applied transverse magnetic field and the analysis made under the following assumptions: (i) The flow is viscous and incompressible. (ii) The flow is fully developed. (iii) The temperature varies linearly along the wall. (iv) The temperature difference between the walls is not large enough to cause free convection current to flow. Exact solutions for the velocities and temperatures for the ionized and neutral particles and the induced magnetic field are derived. These together with the heat transfer are discussed quantitatively. Keywords: Couette flow, two-component plasma, field structure, heat transfer, Hartmann number, Magneto hydrodynamic, Nusselt number Global Journal or Pure and Applied Sciences Vol. 14 (4) 2008: pp. 439-44

Effects of radiation on oscillatory MHD flow and heat transfer in a porous medium past an infinite vertical moving heated porous plate

No Abstract.Global Journal of Pure and Applied Sciences Vol. 13 (2) 2007: pp. 295-30

Estimation of Thermal Conductivity in the North-western Niger Delta Sedimentary Basin, Nigeria, Using Geophysical Well Logs

Thermal conductivity estimates are computed from nineteen petroleum wells in the northwestern Niger Delta, Nigeria, using a geometric mean model. Sonic and gamma-ray logs were digitised and used in the estimation of in situ conductivity. The Niger Delta is composed of three major diachronous lithostratigraphic units of shaly Akata, shaly-sandstone Agbada and sandy Benin formations, which form the bulk of the deltaic sediments. All the wells used in the study could only penetrate the top-most Benin and the underlying Agbada formations, except Akata that is the last deeply lying formation. Mineralogy, porosity and lithology exert the most important control on the matrix thermal conductivity in the Niger Delta sedimentary basin. There is a decrease of thermal conductivity with increasing shale fraction. The bulk conductivity also show an increase with increasing sandstone fraction. Increase in porosity results in a decrease in bulk conductivity. Thermal conductivity values and variations for a given lithologic unit are reduced at increased porosity, such that thermal conductivity of the top-most continental Benin sand-stone formation vary between 2.39W/m°C and 2.74W/m°C with an average of 2.52W/m°C. Thermal conductivity for the underlying, marine shaly-sandstone Agbada formation varies between 2.16W/ m°C and 2.69W/m°C with an average of 2.33W/m°C. Keywords: Thermal conductivity, porosity, lithology, well logs, geometric mean model, Niger Delta Basin, NigeriaDiscovery and Innovation Vol. 19 (4) 2007: pp. 269-27