Cavitation simulation using a new simple homogeneous cavitation model

Satoshi Watanabe, Wakana Tsuru, Yuya Yamamoto, Shinichi Tsuda

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

In this paper, preliminary simulations of cavitating flows in two cases, for a two-dimensional convergent-divergent nozzle and a two-dimensional Clark Y-11.7% hydrofoil, are carried out based on our new simple homogeneous cavitation model. The model treats liquid-vapor two-phase flows as usual homogeneous cavitation model but it considers two extreme conditions; the bubbly flow with dispersed bubbles in continuous liquid phase and mist flow with dispersed liquid droplets in continuous vapor phase, which are switched depending upon the local volumetric fraction of two phases, i.e. the void fraction. To enhance the unsteadiness due to the instability at the cavity interface, the turbulent shear stress is modified based on the fluid properties of continuum phase. The results are compared to the previous experimental measurements and the results simulated with Schnerr-Sauer cavitation model. It is found that turbulent shear stress has important effects on cavitation unsteadiness. However, time-averaged lift and drag characteristics of hydrofoil against cavitation are not well reproduced regardelss of cavitation model and turbulence modification.

Original languageEnglish
Publication statusPublished - Jan 1 2019
Event16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016 - Honolulu, United States
Duration: Apr 10 2016Apr 15 2016

Conference

Conference16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016
CountryUnited States
CityHonolulu
Period4/10/164/15/16

Fingerprint

Cavitation
Hydrofoils
Shear stress
Liquids
Vapors
Void fraction
Fog
Bubbles (in fluids)
Two phase flow
Drag
Nozzles
Turbulence
Fluids

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

Watanabe, S., Tsuru, W., Yamamoto, Y., & Tsuda, S. (2019). Cavitation simulation using a new simple homogeneous cavitation model. Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States.

Cavitation simulation using a new simple homogeneous cavitation model. / Watanabe, Satoshi; Tsuru, Wakana; Yamamoto, Yuya; Tsuda, Shinichi.

2019. Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States.

Research output: Contribution to conferencePaper

Watanabe, S, Tsuru, W, Yamamoto, Y & Tsuda, S 2019, 'Cavitation simulation using a new simple homogeneous cavitation model' Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States, 4/10/16 - 4/15/16, .
Watanabe S, Tsuru W, Yamamoto Y, Tsuda S. Cavitation simulation using a new simple homogeneous cavitation model. 2019. Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States.
Watanabe, Satoshi ; Tsuru, Wakana ; Yamamoto, Yuya ; Tsuda, Shinichi. / Cavitation simulation using a new simple homogeneous cavitation model. Paper presented at 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016, Honolulu, United States.
@conference{fd9780a6f6a84653ba0e6a70e82dea86,
title = "Cavitation simulation using a new simple homogeneous cavitation model",
abstract = "In this paper, preliminary simulations of cavitating flows in two cases, for a two-dimensional convergent-divergent nozzle and a two-dimensional Clark Y-11.7{\%} hydrofoil, are carried out based on our new simple homogeneous cavitation model. The model treats liquid-vapor two-phase flows as usual homogeneous cavitation model but it considers two extreme conditions; the bubbly flow with dispersed bubbles in continuous liquid phase and mist flow with dispersed liquid droplets in continuous vapor phase, which are switched depending upon the local volumetric fraction of two phases, i.e. the void fraction. To enhance the unsteadiness due to the instability at the cavity interface, the turbulent shear stress is modified based on the fluid properties of continuum phase. The results are compared to the previous experimental measurements and the results simulated with Schnerr-Sauer cavitation model. It is found that turbulent shear stress has important effects on cavitation unsteadiness. However, time-averaged lift and drag characteristics of hydrofoil against cavitation are not well reproduced regardelss of cavitation model and turbulence modification.",
author = "Satoshi Watanabe and Wakana Tsuru and Yuya Yamamoto and Shinichi Tsuda",
year = "2019",
month = "1",
day = "1",
language = "English",
note = "16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016 ; Conference date: 10-04-2016 Through 15-04-2016",

}

TY - CONF

T1 - Cavitation simulation using a new simple homogeneous cavitation model

AU - Watanabe, Satoshi

AU - Tsuru, Wakana

AU - Yamamoto, Yuya

AU - Tsuda, Shinichi

PY - 2019/1/1

Y1 - 2019/1/1

N2 - In this paper, preliminary simulations of cavitating flows in two cases, for a two-dimensional convergent-divergent nozzle and a two-dimensional Clark Y-11.7% hydrofoil, are carried out based on our new simple homogeneous cavitation model. The model treats liquid-vapor two-phase flows as usual homogeneous cavitation model but it considers two extreme conditions; the bubbly flow with dispersed bubbles in continuous liquid phase and mist flow with dispersed liquid droplets in continuous vapor phase, which are switched depending upon the local volumetric fraction of two phases, i.e. the void fraction. To enhance the unsteadiness due to the instability at the cavity interface, the turbulent shear stress is modified based on the fluid properties of continuum phase. The results are compared to the previous experimental measurements and the results simulated with Schnerr-Sauer cavitation model. It is found that turbulent shear stress has important effects on cavitation unsteadiness. However, time-averaged lift and drag characteristics of hydrofoil against cavitation are not well reproduced regardelss of cavitation model and turbulence modification.

AB - In this paper, preliminary simulations of cavitating flows in two cases, for a two-dimensional convergent-divergent nozzle and a two-dimensional Clark Y-11.7% hydrofoil, are carried out based on our new simple homogeneous cavitation model. The model treats liquid-vapor two-phase flows as usual homogeneous cavitation model but it considers two extreme conditions; the bubbly flow with dispersed bubbles in continuous liquid phase and mist flow with dispersed liquid droplets in continuous vapor phase, which are switched depending upon the local volumetric fraction of two phases, i.e. the void fraction. To enhance the unsteadiness due to the instability at the cavity interface, the turbulent shear stress is modified based on the fluid properties of continuum phase. The results are compared to the previous experimental measurements and the results simulated with Schnerr-Sauer cavitation model. It is found that turbulent shear stress has important effects on cavitation unsteadiness. However, time-averaged lift and drag characteristics of hydrofoil against cavitation are not well reproduced regardelss of cavitation model and turbulence modification.

UR - http://www.scopus.com/inward/record.url?scp=85050798282&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85050798282&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85050798282

ER -