A Marker-Density-Function approach for the direct numerical simulations of bubbly flows

Autor:	Akihiro Kanai, Hideaki Miyata
Rok vydání:	1999
Předmět:	Physics::Fluid Dynamics Physics Classical mechanics Flow (mathematics) Drag Turbulence Direct numerical simulation Probability density function Boundary value problem Mechanics Reduction (mathematics) Couette flow
Zdroj:	Journal of the Society of Naval Architects of Japan. 1999:21-30
ISSN:	1884-2070 0514-8499
DOI:	10.2534/jjasnaoe1968.1999.21
Popis:	The Marker-Density-Function (MDF) method is developed for the direct numerical simulation of bubbly flows. The method is a front-capturing approach and then can capture three-dimensional complicated interfaces. The two phases of gas and liquid are separately solved and the dynamic boundary conditions at the interface are employed to connect the two phases. A new technique to avoid merging of bubbles is also developed to investigate the effects of a large number of bubbles in a periodical turbulent channel flow. Here the turbulent Couette flow containing 108 bubbles is simulated and the mechanism of drag reduction by microbubbles is explained by showing the 3 dimensional flow structures.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f66c84d9b2e86e7de2cadc105dd1218d https://doi.org/10.2534/jjasnaoe1968.1999.21 Zobrazit plný text záznamu