Documentation

Controlled Mass Flow Rate Source (TL)

Generate time-varying mass flow rate

Library

Thermal Liquid/Sources

Description

The Controlled Mass Flow Rate Source (TL) block represents an ideal compressor generating a variable mass flow rate through its inlets. The compressor can hold the specified mass flow rate regardless of the pressure differential across its inlets. No heat exchange occurs between the compressor and the flowing liquid.

Ports A and B represent the compressor inlets. Both ports are thermal liquid conserving ports. The mass flow rate is positive when liquid flows from inlet A to inlet B. The block provides physical signal port M so that you can specify the mass flow rate through the compressor inlets.

Variables

Use the Variables tab in the block dialog box (or the Variables section in the block Property Inspector) to set the priority and initial target values for the block variables prior to simulation. For more information, see Set Priority and Initial Target for Block Variables.

Assumptions and Limitations

  • No heat exchange occurs between the compressor and the flowing liquid.

  • The pressure differential between the compressor inlets is independent of the mass flow rate through those inlets.

Parameters

Cross-sectional area at ports A and B

Enter the cross-sectional area of the adjoining pipes. The default value is 0.01 m^2.

Characteristic longitudinal length

Enter the mean path length the liquid must flow through to go from inlet A to inlet B. The default value is 0.1 m.

Ports

AThermal liquid conserving port associated with compressor inlet A
BThermal liquid conserving port associated with compressor inlet B
MPhysical signal port providing the mass flow rate between inlets A and B

Introduced in R2013b

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