Naslov
Compressible two–phase flow model with the Ghost Fluid Method for marine hydrodynamics

Autori
Gatin, Inno ; Liu, Shengnan ; Vladimir, Nikola ; Jasak, Hrvoje

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
21st Numerical Towing Tank Symposium (NUTTS) / Bertram, Volker - Cortona, 2018, 60-65

Skup
21st Numerical Towing Tank Symposium (NUTTS)

Mjesto i datum
Cortona, Italija, 30.09.2018. - 02.10.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Compressible two phase flow ; CFD ; Ghost Fluid Method

Sažetak
A Finite Volume (FV) based two–phase flow model where air (gas) is modelled as an ideal gas undergoing adiabatic process, while water (liquid) is assumed to be incompressible, is presented in this paper. The model employs the Ghost Fluid Method (GFM) to discretise numerical operators across the free surface, where the sharp change in fluid compressibility is taken into account along with the jump of other properties (density and consequential pressure gradient). The numerical method is based on the two–phase incompressible flow model which utilises the GFM [Vukčević et al., 2017]. The sharp treatment of compressibility properties and the pressure–based formulation, along with the ideal adiabatic gas assumption, proved to result in a very efficient and robust numerical method due to the fact that the equations reduce to incompressible form when the compressibility effects are absent. Thus, realistic every–day simulations including complex geometries can be simulated on large grids where compressibility effects may or may not happen, without additional computational cost with respect to the equivalent incompressible method.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja

POVEZANOST RADA