# Thermofluids

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• Created by: Maxter
• Created on: 15-03-16 21:31
Conservation of Mass
For any system closed to all transfers of mass and energy, the mass of the system must remain constant over time, dm/dt = 0
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Conservation of Momentum
The momentum of a system is constant if there are no eternal forces acting on it, F = ma
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Conservation of Energy
Energy can neither be created of transferred but transformed from one form to another, Q -W = DEt/Dt
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System
A continuous mass of fluid that always contains the same mass but whose shape/volume may change
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Environment
The area outside the system boundary
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Control Volume
Do not deform with the flow and mass, momentum and energy are allowed to cross the control volume boundary
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Open Process
Flow through a control volume process
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Reynolds Number Re
Inertial force/viscous force
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## Other cards in this set

### Card 2

#### Front

Conservation of Momentum

#### Back

The momentum of a system is constant if there are no eternal forces acting on it, F = ma

### Card 3

#### Front

Conservation of Energy

System

Environment

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