Evaluation of the successive approximations method for acoustic streaming numerical simulations

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

S. O. Catarino (Autor) Outra; G. Minas (Autor) Outra; J. M. Miranda (Autor) FEUP

Revista

Título: Journal of the Acoustical Society of America

Vol. 139 Nº 5

Páginas: 2269-2279

ISSN: 0001-4966

Editora: Acoustical Society of America

Indexação

ISI Web of Knowledge - 1 Citação

ISI Web of Science

Scopus - 3 Citações

INSPEC

Projetos Associados

LEPAE/CEFT - RL2 - (Bio) Chemical Engineering: Multi-Scale Approaches for Sustainable Environment and Health

Outras Informações

ID Authenticus: P-00K-GQ1

DOI: 10.1121/1.4946993

Abstract (EN): This work evaluates the successive approximations method commonly used to predict acoustic streaming by comparing it with a direct method. The successive approximations method solves both the acoustic wave propagation and acoustic streaming by solving the first and second order Navier-Stokes equations, ignoring the first order convective effects. This method was applied to acoustic streaming in a 2D domain and the results were compared with results from the direct simulation of the Navier-Stokes equations. The velocity results showed qualitative agreement between both methods, which indicates that the successive approximations method can describe the formation of flows with recirculation. However, a large quantitative deviation was observed between the two methods. Further analysis showed that the successive approximation method solution is sensitive to the initial flow field. The direct method showed that the instantaneous flow field changes significantly due to reflections and wave interference. It was also found that convective effects contribute significantly to the wave propagation pattern. These effects must be taken into account when solving the acoustic streaming problems, since it affects the global flow. By adequately calculating the initial condition for first order step, the acoustic streaming prediction by the successive approximations method can be improved significantly.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11