A front-tracking/front-capturing method for the simulation of 3D multi-fluid flows with free surfaces

Autor(es)

Sousa, F. S. de ; Mangiavacchi, N. ; Nonato, L. G. ; Castelo, A. ; Tomé, M. F. ; Ferreira, V. G. ; Cuminato, J. A. ^[7] ; McKee, S.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Computational Physics; v. 198, n. 2, p. 469-499, Aug. 2004.
• Área do conhecimento: Ciências Exatas e da Terra - Matemática
• Assunto(s): Métodos numéricos em dinâmica de fluidos Análise numérica

Resumo

A method for simulating incompressible, imiscible, unsteady, Newtonian, multi-fluid flows with free surfaces is described. A sharp interface separates fluids of different density and viscosity. Surface and interfacial tensions are also considered and the required curvature is geometrically approximated at the fronts by a least squares quadratic fitting. To remove small undulations at the fronts, a mass-conserving filter is employed. The numerical method employed to solve the Navier-Stokes equations is based on the GENSMAC-3D front-tracking method. The velocity field is computed using a finite-difference scheme on an Eulerian grid. The free-surface and the interfaces are represented by an unstructured Lagrangian grid moving through an Eulerian grid. The method was validated by comparing the numerical results with analytical results for a number of simple problems. Complex numerical simulations show the capability and emphasize the robustness of this new method. (AU)

• Processo FAPESP: 01/12623-5 - Simulação numérica de escoamentos multifásicos em malhas não estruturadas
• Beneficiário: Fabrício Simeoni de Sousa
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 00/03385-0 - SNENS III - solução numérica das equações de Navier-Stokes: escoamentos tridimensionais
• Beneficiário: José Alberto Cuminato
• Modalidade de apoio: Auxílio à Pesquisa - Temático