PipeFlow_L4_Advanced_WH_VCM

Created Wednesday 5 March 2025

A model for a fluid flow in a pipe for water hammer effects. A dynamic momentum balance is applied and the kinetic energy terms are negelcted. Energy storage in the surrounding wall is not part of the model.

1. Purpose of Model

This model is appropriate for water hammer effects accounting for possible formation of vapour cavity. Furthermore, the advection pressure differences due to accelerating or decelerating flows are considered. If energy storage in the surrounding wall is of interest consider the combination with Basics:ControlVolumes:SolidVolumes:CylindricalThinWall L4 or Basics:ControlVolumes:SolidVolumes:CylindricalThickWall L4

2. Level of Detail, Physical Effects Considered and Physical Insight


2.1 Level of Detail

Referring to Brunnemann et al. [1], this model refers to the level of detail L4 because the system is modelled with the use of balance equations, which are spatially discretised over the component. The discretisation can be defined by the user.

2.2 Physical Effects Considered

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

2.3 Level of Insight


Heat Transfer

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

Friction Pressure Losses

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

Vapour Cavity model

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

Speed of Sound correction

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

3. Limits of Validity

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

4. Interfaces

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

5. Nomenclature

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

6. Governing Equations

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

6.1 System Description and General model approach

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

6.2 General Model Equations

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

Energy Conservation

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

Mass Conservation

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

Momentum Conservation

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

7. Remarks for Usage

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

8. Validation

see Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced_WH_VCM

9. References

[1] Johannes Brunnemann and Friedrich Gottelt, Kai Wellner, Ala Renz, André Thüring, Volker Röder, Christoph Hasenbein, Christian Schulze, Gerhard Schmitz, Jörg Eiden: "Status of ClaRaCCS: Modelling and Simulation of Coal-Fired Power Plants with CO2 capture", 9th Modelica Conference, Munich, Germany, 2012

10. Authorship and Copyright Statement for original (initial) Contribution

Author:
ClaRa development team, Copyright 2017 - 2025.
Remarks:
This component was developed for ClaRa library.
Acknowledgements:

CLA:
The author(s) have agreed to ClaRa CLA, version 1.0. See https://claralib.com/pdf/CLA.pdf
By agreeing to ClaRa CLA, version 1.0 the author has granted the ClaRa development team a permanent right to use and modify his initial contribution as well as to publish it or its modified versions under the 3-clause BSD License.

11. Version History



Backlinks: ClaRa:Basics:ControlVolumes:FluidVolumes:VolumeVLE L4 Advanced WH VCM