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Heat Transfer E- Book

Energy is defined as the capacity of a substance to do work. It is a property of the substance and it can be transferred by interaction of a system and its surroundings. The student would have encountered these interactions during the study of Thermodynamics. However, Thermodynamics deals with the end states of the processes and provides no information on the physical mechanisms that caused the process to take place. Heat Transfer is an example of such a process. A convenient definition of heat transfer is energy in transition due to temperature differences. Heat transfer extends the Thermodynamic analysis by studying the fundamental processes and modes of heat transfer through the development of relations used to calculate its rate.

The aim of this chapter is to console existing understanding and to familiarise the student with the standard of notation and terminology used in this book. It will also introduce the necessary units.

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Engineering Thermodynamics E- Book

Thermodynamics is an essential subject taught to all science and engineering students. If the coverage of this subject is restricted to theoretical analysis, student will resort to memorising the facts in order to pass the examination. Therefore, this book is set out with the aim to present this subject from an angle of demonstration of how these laws are used in practical situation.

This book is designed for the virtual reader in mind, it is concise and easy to read, yet it presents all the basic laws of thermodynamics in a simplistic and straightforward manner. The book deals with all four laws, the zeroth law and its application to temperature measurements. The first law of thermodynamics has large influence on so many applications around us, transport such as automotive, marine or aircrafts all rely on the steady flow energy equation which is a consequence of the first law of thermodynamics. The second law focuses on the irreversibilities of substances undergoing practical processes. It defines process efficiency and isentropic changes associated with frictional losses and thermal losses during the processes involved.

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Engineering Fluid Mechanics E- Book

Fluid

A fluid is a substance, which deforms when subjected to a force. A fluid can offer no permanent resistance to any force causing change of shape. Fluid flow under their own weight and take the shape of any solid body with which they are in contact. Fluids may be divided into liquids and gases. Liquids occupy definite volumes. Gases will expand to occupy any containing vessel.

S.I Units in Fluids

The dimensional unit convention adopted in this course is the System International or S.I system. In this convention, there are 9 basic dimensions. The three applicable to this unit are: mass, length and time.

The corresponding units are kilogrammes (mass), metres (length), and seconds (time). All other fluid units may be derived from these.

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