research topic

Apr 15th, 2015
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BENSON KILONZO MBITHIMECHANISMS OF HEAT TRANSFER IN ROCKSTHERMAL CONDUCTIVITY OF ROCKSThermal conductivity of a rock (?) is defined as the heat flow across a surface per unit area per unit time when a particular temperature difference exists in a unit length perpendicular to the surface. It depends on following factors:- Chemical composition of the rocks (rocks are aggregates of minerals) 1. Water content of the rock 2. Temperature 3. Pressure 4. Radioactive decay (if any) etc. Thermal conductivity has units of W/(m?) Heat is transported through a saturated porous medium in a combined mechanism: by conduction through its solid matrix and liquid in its pores as well as by convection of the moving liquid. By applying the law of conservation of energy to a control volume, an equation for heat transfer in the saturated porous medium can be expressed as:?c?t??+ ?wcwV?t =? (k?t

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