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

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

2 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 4741 - 4752 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

### Fingerprint

Vorticity
Turbulence models
Vortex flow
Propellers
Cavitation
Computer simulation

### Keywords

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

### Cite this

Sipilä, T., Sánchez-Caja, A., & Siikonen, T. (2014). Eddy vorticity in cavitating tip vortices modelled by different turbulence models using the RANS approach. In 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 (pp. 4741 - 4752). Barcelona, Spain.
Sipilä, Tuomas ; Sánchez-Caja, Antonio ; Siikonen, T. / Eddy vorticity in cavitating tip vortices modelled by different turbulence models using the RANS approach. 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, 2014. pp. 4741 - 4752
title = "Eddy vorticity in cavitating tip vortices modelled by different turbulence models using the RANS approach",
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.",
keywords = "cavitation, propellers, tip vortex, turbulence models, ships",
author = "Tuomas Sipil{\"a} and Antonio S{\'a}nchez-Caja and T. Siikonen",
note = "Project code: 87250",
year = "2014",
language = "English",
isbn = "978-84-942844-7-2",
pages = "4741 -- 4752",
booktitle = "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",

}

Sipilä, T, Sánchez-Caja, A & Siikonen, T 2014, Eddy vorticity in cavitating tip vortices modelled by different turbulence models using the RANS approach. in 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, pp. 4741 - 4752, 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, Spain, 20/07/14.
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, 2014. p. 4741 - 4752.

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

TY - GEN

T1 - Eddy vorticity in cavitating tip vortices modelled by different turbulence models using the RANS approach

AU - Sipilä, Tuomas

AU - Sánchez-Caja, Antonio

AU - Siikonen, T.

N1 - Project code: 87250

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - cavitation

KW - propellers

KW - tip vortex

KW - turbulence models

KW - ships

M3 - Conference article in proceedings

SN - 978-84-942844-7-2

SP - 4741

EP - 4752

BT - 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

CY - Barcelona, Spain

ER -

Sipilä T, Sánchez-Caja A, Siikonen T. Eddy vorticity in cavitating tip vortices modelled by different turbulence models using the RANS approach. In 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. 2014. p. 4741 - 4752