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Master's Dissertation
DOI
10.11606/D.55.2001.tde-11122001-173103
Document
Author
Full name
Fernando Luiz Pio dos Santos
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2001
Supervisor
Committee
Mangiavacchi, Norberto (President)
Castelo Filho, Antonio
Silveira Neto, Aristeu da
Title in Portuguese
Simulação numérica de escoamentos multifásicos utilizando o sistema FreeFlow-2D.
Keywords in Portuguese
escoamento multifásico
superfície livre
tensão interfacial
Abstract in Portuguese
Este trabalho descreve um método para expandir a aplicabilidade do sistema FreeFlow-2D para problemas de escoamentos de fluidos multifásicos. Este método permite a simulação de escoamento de fluido multifásico, incompressível e com superfície livre. Um número arbitrário de fases com propriedades diferentes pode ser utilizado. Tensões superficial e interfacial são também consideradas. A técnica numérica utilizada baseia-se no GENSMAC (Generalized-Simplified-Marker-and-Cell) e consideram-se propriedades variáveis de acordo com a posição da interface durante o escoamento. O campo de velocidade é computado utilizando-se às equações de Navier-Stokes discretizadas por esquema de diferença finita numa malha deslocada. O método foi implementado em três módulos: Modelador, Simulador e Visualizador. A validação foi efetuada comparando-se os resultados numéricos com resultados analíticos e experimentais. O método mostrou-se robusto e computacionalmente eficiente para os problemas considerados.
Title in English
Numerical simulation of multi-phase flows using the FreeFlow-2D system.
Keywords in English
free surface
interface tension
mnlti-phase flows
Abstract in English
This work describes a method to expand the applicability of the system FreeFlow-2D in multi-phase flows problems. This method allows the simulation of incompressible free surface multi-phase flows. An arbitrary number of phases having different properties can be used. Surface and interface tension effects are also considered. The numerical technique is based on the GENSMAC (Generalized-Simplified-Marker-and-Cell) and it considers the properties varying according to the position of the interfaces in the flow. The velocity field is computed using the Navier-Stokes equations discretized by finite-difference on stagered grid. The method was implemented in three modules: the modeling module, the simulation module, and the visualization module. The validation was effected by comparing numerical results with analytical and experimental results. The method shown to be robust and computationally efficient in the problems considered.
 
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Publishing Date
2002-01-30
 
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