Conservation of Energy
Conservation of Energy is one of the three fundamental equations that govern the flow of fluids. The other two are Conservation of Mass and Rate of Change of Momentum. In addition to these equations material properties and state equations are needed.
The Conservation of Energy equation must account for a wide range of energy sources and mechanisms for adding or removing energy. The relationship between work and energy is very important since energy must be consumed when work is done or energy can be increased when work is done on a body.
The 1st Law of Thermodynamics for a closed system (one in which there is no mass exchange with the surroundings) will be used along with Reynolds Transport Theorem to derive the Conservation of Energy equation for a control volume or open system (one in which there is mass exchange with the surroundings). As a first step we will examine different forms of energy and work.
Define open system, define closed system