Simulation of small-scale cavity structures through coupling of the mixture model with the discrete bubble model
Conference poster, 2017

Most incompressible models to simulate cavitating flows relies on a rudimentary mixture assumption of vapour and liquid, that does not account for the dynamics of small-scale bubbles in cloudy cavitation. This PhD project aims to develop a Eulerian sub-grid mixture model for incompressible LES, that implements mixture properties for vapour clouds, extracted from DNS data, coupled with Lagrangian bubble models for very sparse clouds. The new model will yield a more realistic condensation process, derived from vapour cloud dynamics, with seamless transition to micro-bubble dynamics. In the current study, the governing equations are improved to avoid non-realistic flow variations during the Eulerian-Lagrangian transition.

Author

Ebrahim Ghahramani

Chalmers, Shipping and Marine Technology, Marine Technology

Rickard Bensow

Chalmers, Shipping and Marine Technology, Marine Technology

Development and experimental validation of computational models for cavitating flows, surface erosion damage and material loss (CaFE)

European Commission (Horizon 2020), 2015-01-01 -- 2019-01-01.

Chalmers Area of Advance Transport - funding 2017

Chalmers, 2017-01-01 -- 2017-12-31.

Areas of Advance

Transport

Energy

Subject Categories

Fluid Mechanics and Acoustics

Marine Engineering

More information

Latest update

11/26/2018