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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Fluid interface detection technique based on neighborhood particles centroid deviation (NPCD) for particle methods

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Autor(es):
Tsukamoto, Marcio Michiharu ; Cheng, Liang-Yee ; Motezuki, Fabio Kenji
Número total de Autores: 3
Tipo de documento: Artigo Científico
Fonte: International Journal for Numerical Methods in Fluids; v. 82, n. 3, p. 148-168, SEP 30 2016.
Citações Web of Science: 3
Resumo

Particle-based CFD methods are powerful approaches to investigate free surface, multiphase flows, and fluid structure interaction problems because of their ability of tracking moving fluid interface even with huge deformations or fragmentation and merging. However, many fluid interface particle detection techniques are simple to implement but with low accuracy or provide relatively good detection results at complicated implementation cost or higher computational time. In case of incompressible flow simulation methods solving the Poisson equation of pressure, such as the moving particle semi-implicit method, boundary particles detection techniques' accuracy affects precision and stability of pressure computation and interaction between fluid phases. In the present work, a new fluid interface particle detection technique is proposed to improve the accuracy of the boundary particles detection and keep the implementation easy. Denominated as the neighborhood particles centroid deviation technique, it is a two-criteria technique based on the particle number density and the neighborhood particles weighted geometric center deviation. Compared with other techniques, the proposed neighborhood particles centroid deviation technique shows the best results by eliminating false interface particles inside the fluid domain and keeping the interface particles layer thin and regular. As a result, relatively stable pressure time histories and more consistent pressure and velocity fields are achieved. Copyright (c) 2016 John Wiley \& Sons, Ltd. Copyright (c) 2016 John Wiley \& Sons, Ltd. (AU)

Processo FAPESP: 13/11434-1 - Estudo de escoamentos multifásicos líquido e gás utilizando um simulador de dinâmica de fluidos baseado em um método de partículas
Beneficiário:Marcio Michiharu Tsukamoto
Linha de fomento: Bolsas no Brasil - Pós-Doutorado