Título: Physical review. EImportada do Authenticus Pesquisar Publicações da Revista

Vol. 93 Nº 3

Páginas: 031101-1-031101-5

ISSN: 2470-0045

Editora: American Physical Society

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ID Authenticus: P-00K-98E

DOI: 10.1103/physreve.93.031101

Resumo (PT):

Abstract (EN): We examine fluid flow through cross-slot devices with various depth to width ratios alpha. At low Reynolds number, R-e, flow is symmetric and a sharp boundary exists between the two incoming fluid streams. Above an alpha-dependent critical value, Re-c(alpha), a steady symmetry-breaking bifurcation occurs and a spiral vortex structure develops. Order parameters characterizing the instability grow according to a sixth-order Landau potential, and show a progression from second- to first-order transitions as alpha increases beyond a tricritical value of alpha approximate to 0.55. Flow simulations indicate the instability is driven by vortex stretching at the stagnation point.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5