TWO DIMENSIONAL CONDUCTION HEAT TRANSFER

Two dimensional Conduction Heat transfer



Two Dimensional Conduction Heat Transfer

Introduction

There are several quantities, but among them there are two that are very important practical interest in the study of heat conduction problems. These quantities are the reason for the heat flow and temperature distribution. The flow rates of heat treated in the energy demand in a given system, when required a desirable temperature distribution suitably designing the system, from the viewpoint of materials (Terraneo & Peyrard, 2002). In any event in, once it is known the temperature distribution is possible to determine the flow rates of heat with the help of so-called Fourier's Law. The temperature distribution is linear, and the heat flux is constant from one end to another of a plate, for the case of the radial equation produces. And thus the temperature distribution is in logarithmic form.

T = M + N ln r

Discussion

Heat Conduction

The heat transfer takes place within a medium and can be best described by a solid be. If an amount of heat flows through a solid state, so the temperature changes within the Body. The essential factor for the degree of temperature change is in addition to the thickness of the body the so-called thermal conductivity is high, then the heat flow virtually unimpeded pass through the body, which is expressed in a small temperature change (Rubin & William, 1971).

Convection (Heat Transfer)

The heat transfer always takes place between a body and a fluid. If due to temperature difference a heat transfer takes place, it is located between the body and fluid is a thermal resistance. The magnitude of the resistance is described by the so-called heat transfer coefficient is very small, then the thermal resistance is large is very large, then the thermal resistance is small.

Thermal Radiation

Every body is with its surroundings in the radiation exchange. It flows a heat flow. Decisive for the Heat flux is substantially the temperature difference, which 4th with the Power of the heat flow is determined. There are also the so-called emission coefficient that the location, the type and color of the body dependent. You know if a black and a white seat of the solar radiation are exposed, then the black bank a much higher temperature than the whites.

Transmission of Heat

The Transmission Heat concerns the study of phenomena that relates to all those physical processes in which a certain amount of thermal energy is transferred from one system to another due to a difference in temperature (Rieder & Lebowitz, 1967). These processes take place in accordance with the principles of thermodynamics, whose object of study are in equilibrium systems in which the physical quantities involved are considered independent of time. For the First Principle the thermal energy released by a system must be equal to that received from the other and the heat, to the Second Law, passes from the body warmer to a cooler.

However, between Thermodynamics and Heat Transfer there is one major difference: whereas in ...