Evidences of turbulent mixing in multi-pumping flow systems

• Type: Article in International Scientific Journal
• Date: 2009

Authors

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

Journal

Title: Talanta

Vol. 79 No. 4

Pages: 978-983

ISSN: 0039-9140

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 21 Citations

ISI Web of Science

Scopus - 19 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

CORDIS: Health sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6