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Título: NUMERICAL SIMULATION OF TWO-PHASE FLOW WITH INTERFACES
Autor: JOSE RONALDO CHAVES DE MELO
Colaborador(es): ANGELA OURIVIO NIECKELE - Orientador
Catalogação: 12/JAN/2012 Língua(s): PORTUGUESE - BRAZIL
Tipo: TEXT Subtipo: THESIS
Notas: [pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio.
[en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio.
Referência(s): [pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=18967&idi=1
[en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=18967&idi=2
DOI: https://doi.org/10.17771/PUCRio.acad.18967
Resumo:
The present work presents a numerical method for the solution of two-dimensional flows of incompressible and immicible fluids in the presence of na interface. The conservation equations are discretized by the finite volume method. The interface modeling is based on the VOF method, in which the relative amount of the fluids in each control volume is described by a variable, denominated here as saturation. Once the distribution of this quantity is known, it is possible to construct the interface, when needed. The main contribution of this work is related to the reconstruction of the interface. For that purpose, it is taken into account the interface angle of inclination inside the control volume. This allows a more precise interface advection that it is usually found with the algorithms based on the VOF method. The interface angle inside a cell is obtained based on its saturation ando n the saturationof two adjacentcells crossed by the interface. By the presents scheme, the interface curvature needed to calculate the capillary pressure can then be easily obtained. Axi-symmetric domains were also considered. For these cases, an special treatment near the axis was necessary. Finally, the algorithm allows the specification of the interface contact angle with a solid surface. Several test problems were examined, presenting good results, validating the method.
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