Physical enclosure with fixed liquid volume
The Constant Volume Chamber (TL) block represents a physical enclosure with a fixed volume of liquid. The enclosure can exchange mass and energy with its surroundings, allowing its internal pressure and temperature to evolve over time. Heat transfer occurs via convection, as liquid enters or exits the chamber, and conduction, as thermal energy flows through the chamber walls and the liquid itself.
Port A is a thermal liquid conserving port that corresponds to the chamber inlet. Pressure in the chamber equals the pressure at this port. Port Q is a thermal conserving port associated with the heat flux through the chamber wall. Temperature in the chamber equals the temperature at this port.
The following equations govern the dynamic evolution of liquid pressure and temperature in the chamber:
|Mass flow rate into chamber|
|βint||Liquid isothermal bulk modulus|
|αint||Liquid isobaric thermal expansion coefficient|
|cint||Liquid specific heat|
|uint||Liquid specific internal energy|
|ρint||Liquid mass density|
|φA||Thermal energy flux into chamber through port A|
|Thermal energy flux into chamber through port Q|
Enter the volume of liquid present in the chamber. This volume remains constant throughout the simulation. Values must equal or exceed zero. The default value is 1e-3 m^3.
Enter the characteristic length of the chamber. This length is the average distance that liquid must traverse as it leaves the chamber. The default value is 1e-1 m.
Enter the absolute pressure of the enclosed liquid at time zero. The default value is 1 atm.
Enter the temperature of the enclosed liquid at time zero. The default value is 293.15 K.