### Abstract

Under certain conditions, the flow of a liquid around an obstacle, e.g. a hydrofoil, can cause an attached sheet of vapor, so-called sheet cavitation. The simulation of such an unsteady vapor sheet has been explored using an interface-capturing technique. For this technique the flow of a hypothetical mixture, part liquid, part vapor, is considered. In this flow the relation between density and pressure is specified through an equation of state, which has been chosen such that it gives an approximation of the actual physics of cavitation, i.e. that the density of the mixture equals the density of the liquid in non-cavitating flow regions, and the density of the vapor in cavitating flow regions. The major part of the flow field will be non-cavitating and have constant density. In this part of the flow field the artificial-compressibility technique is used to compute the flow. This technique is extended to allow the calculation of the flow in the vapor region. The computational method based on this mathematical model of cavitating flows can simulate the flow around two-dimensional airfoils. Results show that the method can reliably simulate incompressible, steady and unsteady flow and the initial growth phase of attached sheet cavitation.

Original language | English |
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Title of host publication | 28th Fluid Dynamics Conference 1997 |

Subtitle of host publication | 29 June 1997 - 02 July 1997, Snowmass Village, CO, U.S.A. |

Place of Publication | Reston, VA |

Publisher | Aerospace Research Central |

DOIs | |

Publication status | Published - 1997 |

Externally published | Yes |

Event | 28th Fluid Dynamics Conference 1997 - Snowmass Village, United States Duration: 29 Jun 1997 → 2 Jul 1997 Conference number: 28 |

### Publication series

Name | AIAA Meeting Paper |
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Publisher | Aerospace Research Central |

Number | 97-1936 |

ISSN (Print) | 0146-3705 |

### Conference

Conference | 28th Fluid Dynamics Conference 1997 |
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Country | United States |

City | Snowmass Village |

Period | 29/06/97 → 2/07/97 |

### Fingerprint

### Cite this

*28th Fluid Dynamics Conference 1997: 29 June 1997 - 02 July 1997, Snowmass Village, CO, U.S.A.*(AIAA Meeting Paper; No. 97-1936). Reston, VA: Aerospace Research Central. https://doi.org/10.2514/6.1997-1936

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*28th Fluid Dynamics Conference 1997: 29 June 1997 - 02 July 1997, Snowmass Village, CO, U.S.A..*AIAA Meeting Paper, no. 97-1936, Aerospace Research Central, Reston, VA, 28th Fluid Dynamics Conference 1997, Snowmass Village, United States, 29/06/97. https://doi.org/10.2514/6.1997-1936

**Calculation of unsteady attached cavitation.** / Janssens, M.E.; Hulshoff, S.J.; Hoeijmakers, H.W.M.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Calculation of unsteady attached cavitation

AU - Janssens, M.E.

AU - Hulshoff, S.J.

AU - Hoeijmakers, H.W.M.

PY - 1997

Y1 - 1997

N2 - Under certain conditions, the flow of a liquid around an obstacle, e.g. a hydrofoil, can cause an attached sheet of vapor, so-called sheet cavitation. The simulation of such an unsteady vapor sheet has been explored using an interface-capturing technique. For this technique the flow of a hypothetical mixture, part liquid, part vapor, is considered. In this flow the relation between density and pressure is specified through an equation of state, which has been chosen such that it gives an approximation of the actual physics of cavitation, i.e. that the density of the mixture equals the density of the liquid in non-cavitating flow regions, and the density of the vapor in cavitating flow regions. The major part of the flow field will be non-cavitating and have constant density. In this part of the flow field the artificial-compressibility technique is used to compute the flow. This technique is extended to allow the calculation of the flow in the vapor region. The computational method based on this mathematical model of cavitating flows can simulate the flow around two-dimensional airfoils. Results show that the method can reliably simulate incompressible, steady and unsteady flow and the initial growth phase of attached sheet cavitation.

AB - Under certain conditions, the flow of a liquid around an obstacle, e.g. a hydrofoil, can cause an attached sheet of vapor, so-called sheet cavitation. The simulation of such an unsteady vapor sheet has been explored using an interface-capturing technique. For this technique the flow of a hypothetical mixture, part liquid, part vapor, is considered. In this flow the relation between density and pressure is specified through an equation of state, which has been chosen such that it gives an approximation of the actual physics of cavitation, i.e. that the density of the mixture equals the density of the liquid in non-cavitating flow regions, and the density of the vapor in cavitating flow regions. The major part of the flow field will be non-cavitating and have constant density. In this part of the flow field the artificial-compressibility technique is used to compute the flow. This technique is extended to allow the calculation of the flow in the vapor region. The computational method based on this mathematical model of cavitating flows can simulate the flow around two-dimensional airfoils. Results show that the method can reliably simulate incompressible, steady and unsteady flow and the initial growth phase of attached sheet cavitation.

UR - http://www.scopus.com/inward/record.url?scp=84964237545&partnerID=8YFLogxK

U2 - 10.2514/6.1997-1936

DO - 10.2514/6.1997-1936

M3 - Conference contribution

AN - SCOPUS:84964237545

T3 - AIAA Meeting Paper

BT - 28th Fluid Dynamics Conference 1997

PB - Aerospace Research Central

CY - Reston, VA

ER -