# Eddy vorticity in cavitating tip vortices modelled by different turbulence models using the RANS approach

Tuomas Sipilä, Antonio Sánchez-Caja, T. Siikonen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

3 Citations (Scopus)

## Abstract

VTT Technical Research Centre of Finland and Aalto University have been investigating numerical simulation of cavitating propellers. Special emphasis is placed on the simulation of cavitating tip vortices. The simulations are performed with the $k-{\epsilon> SST$k-{\omega> and EARSM turbulence models in wetted and cavitating conditions. The calculations are performed in uniform inflow. The propeller performance characteristics and the wake velocities in the wetted conditions were compared to the measurements. Additionally, the simulated cavitation extent on the propeller was compared to the measurements. Good correlation between the tests and simulations were found. The turbulence models gave significant differences to the tip vortex core solutions in wetted and cavitating conditions. The $k-{\epsilon> model gave high non-dimensional Reynolds stresses both in wetted and cavitating conditions. The anisotropic EARSM model gave the lowest Reynolds stresses in the wetted conditions in the vortex core. In cavitating conditions the SST$k-{\omega> and EARSM models gave very low Reynolds stresses to the vaporous vortex core.
Original language English Proceedings of the jointly organised 11th World Congress on Computational Mechanics WCCM XI, 5th European Conference on Computational Mechanics ECCM V, 6th European Conference on Computational Fluid Dynamics, ECFD VI Barcelona, Spain International Center for Numerical Methods in Engineering (CIMNE) 4741 - 4752 978-84-942844-7-2 Published - 2014 A4 Article in a conference publication 11th World Congress on Computational Mechanics - 5th European Conference on Computational Mechanics - 6th European Conference on Computational Fluid Dynamics, WCCM XI - ECCM V - ECFD VI - Barcelona, SpainDuration: 20 Jul 2014 → 25 Jul 2014

### Conference

Conference 11th World Congress on Computational Mechanics - 5th European Conference on Computational Mechanics - 6th European Conference on Computational Fluid Dynamics, WCCM XI - ECCM V - ECFD VI WCCM XI - ECCM V - ECFD VI Spain Barcelona 20/07/14 → 25/07/14

## Keywords

• cavitation
• propellers
• tip vortex
• turbulence models
• ships

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