FixedVolume

Represents a chamber with fixed-volume.

This component models a control volume of fixed geometric size vol. The total mass m of the fluid in the volume is calculated as m = rho * vol. The component conserves mass, meaning the net mass flow rate port.m_flow through the port is equal to the rate of change of mass within the volume:

$$port.m_{f}low=\frac{dm}{dt}$$

The initial pressure in the volume is set by the parameter p0. The pressure p within the volume is exposed at the port.

Usage

FixedVolume(p0, vol)

Parameters:

Name	Description	Units	Default value
p0	Initial pressure within the fixed volume.	Pa
vol	The geometric volume of the chamber, which is constant.	m3

Connectors

• port - (Port)

Variables

Name	Description	Units
rho	Density of the fluid within the volume.	kg/m3
m	Total mass of the fluid contained within the volume.	kg
p	Instantaneous pressure of the fluid within the volume.	Pa

Behavior

Behavior of this component cannot be rendered because it includes path variables.

Source

# Represents a chamber with fixed-volume.
#
# This component models a control volume of fixed geometric size `vol`.
# The total mass `m` of the fluid in the volume is calculated as `m = rho * vol`.
# The component conserves mass, meaning the net mass flow rate `port.m_flow`
# through the port is equal to the rate of change of mass within the volume:
# ```math
# port.m_flow = \frac{dm}{dt}
# ```
# The initial pressure in the volume is set by the parameter `p0`. The pressure `p`
# within the volume is exposed at the `port`.
component FixedVolume
  # Fluid port for connection, allowing mass flow and pressure exchange.
  port = Port() [{
    "Dyad": {
      "placement": {
        "diagram": {"x1": -20, "x2": 20, "y1": 480, "y2": 520, "sh": 1, "sw": 1, "rot": 0}
      }
    }
  }]
  # Initial pressure within the fixed volume.
  parameter p0::Pressure
  # The geometric volume of the chamber, which is constant.
  parameter vol::Volume
  # Density of the fluid within the volume.
  variable rho::Density
  # Total mass of the fluid contained within the volume.
  variable m::Mass
  # Instantaneous pressure of the fluid within the volume.
  variable p::Pressure
relations
  initial p = p0
  rho = density(port.medium, p)
  m = rho*vol
  port.m_flow = der(m)
  port.p = p
end

Flattened Source

# Represents a chamber with fixed-volume.
#
# This component models a control volume of fixed geometric size `vol`.
# The total mass `m` of the fluid in the volume is calculated as `m = rho * vol`.
# The component conserves mass, meaning the net mass flow rate `port.m_flow`
# through the port is equal to the rate of change of mass within the volume:
# ```math
# port.m_flow = \frac{dm}{dt}
# ```
# The initial pressure in the volume is set by the parameter `p0`. The pressure `p`
# within the volume is exposed at the `port`.
component FixedVolume
  # Fluid port for connection, allowing mass flow and pressure exchange.
  port = Port() [{
    "Dyad": {
      "placement": {
        "diagram": {"x1": -20, "x2": 20, "y1": 480, "y2": 520, "sh": 1, "sw": 1, "rot": 0}
      }
    }
  }]
  # Initial pressure within the fixed volume.
  parameter p0::Pressure
  # The geometric volume of the chamber, which is constant.
  parameter vol::Volume
  # Density of the fluid within the volume.
  variable rho::Density
  # Total mass of the fluid contained within the volume.
  variable m::Mass
  # Instantaneous pressure of the fluid within the volume.
  variable p::Pressure
relations
  initial p = p0
  rho = density(port.medium, p)
  m = rho*vol
  port.m_flow = der(m)
  port.p = p
metadata {}
end

Test Cases

No test cases defined.

Related

• Examples

• Experiments

• Analyses

• Tests

  • FluidSystemTest