A method to predict cavitation inception using large-eddy simulation and its application to the flow past a square cylinder
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Contributors
Abstract
A new method to predict traveling bubble cavitation inception is devised. The crux of the method consists in combining the enhanced predictive capabilities of large-eddy-simulation (LES) for flow computation with a simple but carefully designed stability criterion for the cavitation nuclei. For LES a second-order accurate finite element model based on the Galerkin/least-squares method with Runge-Kutta time integration is applied. The incoming nucleus' spectrum is approximated by a Weibull distribution. Moreover, it is shown that under typical conditions the stability of the nuclei can be evaluated with an algebraic criterion emerging from the Rayleigh-Plesset equation. This criterion can be expressed as modified critical Thoma number and fits well into the LES approach. The method was applied to study cavitation inception in a flow past a square cylinder. A good agreement with experimental results was achieved. Furthermore, the principal advantage over statistical (time-averaged) methods could be clearly demonstrated, even though the spatial resolution and application of the LES were restricted by limited computational resources. As the latter keep on growing, a wider range of applications will become accessible methods for cavitation prediction based on algebraic stability criteria combined with LES. Copyrlght
Details
| Original language | English |
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| Pages (from-to) | 316-325 |
| Number of pages | 10 |
| Journal | Journal of Fluids Engineering, Transactions of the ASME |
| Volume | 128 |
| Issue number | 2 |
| Publication status | Published - Mar 2006 |
| Peer-reviewed | Yes |
External IDs
| Scopus | 33645981317 |
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| ORCID | /0000-0002-6485-3825/work/231456300 |