On the 2D nature of flow dynamics in opposed jets mixers

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Gonçalves, ND (Author) FEUP; Salvador, HM (Author) Other; Fonte, CP (Author) Other; Dias, MM (Author) Other; Lopes, JCB (Author) Other; Ricardo J. Santos (Author) FEUP; Madalena M. Dias (Author) FEUP; Hélder M. Salvador (Author) Other; José Carlos B. Lopes (Author) FEUP; Cláudio P. Fonte (Author) Other

Journal

Title: AICHE Journal

Vol. 63

Pages: 2335-2347

ISSN: 0001-1541

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 0 Citations

Associated Projects

LSRE-LCM - Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais

2Dmix - 2Misturadores 2D - Estudo Fundamental e Aplicações da Inversão da Cascata de Energia Turbulenta

AIProcMat@N2020 - Advanced Industrial Processes and Materials for a Sustainable North Region of Portugal2020

Other information

Authenticus ID: P-00M-PS0

DOI: 10.1002/aic.15566

Abstract (EN): Confined impinging jets (CIJs) are reactors used in processes that require fast mixing. In such equipment two fluids are injected from opposite sides of a chamber, impinging into each other and forming flow structures that enable an effective mixing and reaction. The turbulence analysis shows that the energy is injected from smaller scales, having approximately the injectors width, that feed larger scale structures up to larger vortices that occupy the entire mixing chamber width. This energy distribution has an inverse energy cascade, i. e. it is an inversion of the traditional description of homogeneous 3D turbulence. The typical flow scales of 2D CIJs are clearly shown in this work to be linked to the 2D turbulence energy spectrum and to integral scales of turbulence. Moreover, the turbulence mechanisms in 3D CIJs at transitional flow regimes are shown to be similar to 2D CIJs. This is to our knowledge the first demonstration of 2D turbulence in an industrial mixer/reactor. (c) 2016 American Institute of Chemical Engineers AIChE J, 63: 2335-2347, 2017

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13