Cavitation in a Sharp-edged Orifice

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CFD-ACE+ CFD

Summary

Cavitation generally refers to the formation of vapor filled cavities at low pressure regions of a flow field and their subsequent implosion while passing through high pressure regions of the flow field. Their phenomenon generally is undesirable causing erosion of propellers, pumps and other solid bodies. They are however considered and used in a beneficial way for a number applications including ultrasonic cleaning, water purification, high speed underwater propulsion and even to produce high temperatures and pressures for initiating thermonuclear fusion reaction. Therefore, the capability for multi-dimensional simulation of cavitating flows is of critical importance for efficient design and performance of many engineering devices. In this tutorial, the cavitation characteristics of an axisymmetric sharp edged orifice is investigated and compared to some analytical predictions.

Detail

This tutorial introduces the user to the cavitation module available in CFD-ACE+ and discusses the following topics in detail.

  • Importing a grid file into CFD-ACE+.
  • Setting model properties (Cavitation properties).
  • Setting problem type.
  • Setting volume/boundary/initial conditions.
  • Setting solver control properties.
  • Requesting printed and graphical output.
  • Submitting model to obtain a solution.
  • Checking for solution convergence.

Comments

A good tutorial for those interested in modeling cavitation type problems including propellers, pumps, turbomachineries and gas ingestion problems.

Download the file(s)

Download2014_ace_tut_012_Cavitation_Edged_Orifice.zip 4.04 MB