University Taster
Chemical Engineering – University Taster
3.3 Laws of Conservation
When considering the motion of fluids, an essential law of engineering is that of conservation applied to mass, energy, and momentum. These are used in the design of equipment alongside other tools of chemical engineers, as well as in the modelling of system behaviour.
Closed System Law of Conservation
The laws of conservation state that for a closed system, mass, and, and momentum must remain constant over time. For closed systems, the equation shown in Equation 1 summarises this concept.
\(\text{Input \: - \: Output \: = \: Accumulation}\)
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