Evidences of turbulent mixing in multi-pumping flow systems

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Paula R Fortes (Autor) Outra; Mario A Feres (Autor) Outra; Milton K Sasaki (Autor) Outra; Evandro R Alves (Autor) Outra; Elias A G Zagatto (Autor) Outra; Joao A V Prior (Autor) FFUP; Joao L M Santos (Autor) FFUP; Jose L F C Lima (Autor) FFUP

Revista

Título: Talanta

Vol. 79 Nº 4

Páginas: 978-983

ISSN: 0039-9140

Editora: Elsevier

Indexação

ISI Web of Knowledge - 21 Citações

ISI Web of Science

Scopus - 19 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

CORDIS: Ciências da Saúde

Outras Informações

ID Authenticus: P-003-FSE

DOI: 10.1016/j.talanta.2009.01.062

Resumo (PT): Multi-pumping flow systems exploit pulsed flows delivered by solenoid pumps. Their improved performance rely on the enhanced radial mass transport inherent to the pulsed flow, which is a consequence of the establishment of vortices thus a tendency towards turbulent mixing. This paper presents several evidences of turbulent mixing in relation to pulsed flows, such as recorded peak shape, establishment of fluidized beds, exploitation of flow reversal, implementation of relatively slow chemical reactions and/or heating of the reaction medium. In addition, Reynolds number associated with the GO period of a pulsed flow is estimated and photographic images of dispersing samples flowing under laminar regime and pulsed flow conditions are presented. <br> <br> Keywords: Flow analysis; Multi-pumping; Turbulent mixing; Sample dispersion; Pulsed flow <br> <a target="_blank" href="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6THP-4VKXBXF-1&_user=2460038&_coverDate=09%2F15%2F2009&_rdoc=3&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235288%232009%23999209995%231318055%23FLA%23display%23Volume)&_cdi=5288&_sort=d&_docanchor=&_ct=37&_acct=C000057398&_version=1&_urlVersion=0&_userid=2460038&md5=d27a2d173c68f70e7149e3c0317d5d21"> Texto integral</a> <br> <br>

Abstract (EN): Multi-pumping flow systems exploit pulsed flows delivered by Solenoid pumps. Their improved performance rely on the enhanced radial mass transport inherent to the pulsed flow, which is a consequence of the establishment of vortices thus a tendency towards turbulent mixing. This paper presents several evidences of turbulent mixing in relation to pulsed flows. such as recorded peak shape, establishment of fluidized beds, exploitation of flow reversal, implementation of relatively slow chemical reactions and/or heating of the reaction medium. In addition, Reynolds number associated with the GO period of a pulsed flow is estimated and photographic images of dispersing samples flowing under laminar regime and pulsed flow conditions are presented.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6