Fluid Properties Flashcards
What defines the state of a fluid?
The condition of a fluid in a particular region, defined by its properties.
What is a property in thermofluids?
A measurable, variable characteristic of a fluid.
What is a system in thermofluids?
A region of a fluid contained by real and/or virtual boundaries.
What are some key properties of a fluid?
Pressure, Temperature, Density, Viscosity, Energy, Entropy.
What types of boundaries can a system have?
Boundaries may be solid or fluid, constant volume or not.
How do molecules respond to temperature and pressure?
They respond to how excited they are (temperature) and how close together they are (pressure).
What does the fluid state influence?
It influences energy content, density, viscosity, molecular motion chaos, and phase.
What is an extensive property?
A quantity that refers to the entire mass extent, e.g. J (Joules).
What is an intensive property?
A quantity that is independent of extent, e.g. J·kg⁻¹.
What are the two types of properties in thermofluids?
Transport properties and thermodynamic properties.
What is a phase?
The condition of a working fluid as liquid, gas, or vapour.
What is an open system?
A component in a wider thermodynamic device that allows flow in and out.
Are all systems in this course open or closed?
All systems are open systems.
What defines the boundary of a system?
A combination of solid and virtual boundaries defining a fluid region.
What does a change of properties in a system reflect?
It reflects work and heat.
What kind of boundaries does a tube have?
Solid cylinder walls and virtual end boundaries.
