Investigation of the flow field in a three-dimensional Confined Impinging Jets Reactor by means of microPIV and DNS

被引:63
作者
Icardi, Matteo [1 ]
Gavi, Emmanuela [1 ,2 ]
Marchisio, Daniele L. [1 ]
Barresi, Antonello A. [1 ]
Olsen, Michael G. [3 ]
Fox, Rodney O. [2 ]
Lakehal, Djamel [4 ]
机构
[1] Politecn Torino, Dip Sci Mat & Ingn Chim, I-10129 Turin, Italy
[2] Iowa State Univ, Dept Chem & Biol Engn, Ames, IA 50011 USA
[3] Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA
[4] ASCOMP GmbH, CH-8005 Zurich, Switzerland
关键词
Micro-mixer; Confined Impinging Jets Reactor; Micro-Particle Image Velocimetry; Direct Numerical Simulation; Oscillating inflows; AQUEOUS-SOLUTIONS; PARTICLE; TURBULENT; MOTION; PRECIPITATION; HYDRODYNAMICS; NANOPARTICLES; MIXER; PIV;
D O I
10.1016/j.cej.2010.09.046
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Micro-mixer devices, such as the Confined Impinging Jets Reactor (CUR) are currently under study, in particular for precipitation processes of micro- and nano-particles, employed in a variety of applications that include pharmaceuticals, cosmetics, dyes and pesticides. In this work, with the purpose of gaining a better understanding of the main mixing mechanisms occurring in a CIJR, the flow field was studied at four inlet flow rates ranging from Re = 62 to Re = 600. These conditions correspond to regimes with incipient turbulence in the chamber. Micro-Particle Image Velocimetry (microPIV) experiments and Direct Numerical Simulations (DNS) were performed and compared. MicroPIV is an innovative experimental technique that allows measurement of the instantaneous velocity fields in microfluidic devices. The coupled numerical-experimental approach was found to be essential in understanding and explaining the flow behaviour and the development of turbulence, in particular with respect to the important effects of the inlet boundary conditions. Oscillations present in the inlet flow of the device are in fact primarily responsible for the chaotic and turbulent effects in the reactor. These results provide insights that are important in the development of appropriate computational models for this type of micro-reactor or mixers. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:294 / 305
页数:12
相关论文
共 37 条
[1]   A NEW TURBULENCE MODEL FOR PREDICTING FLUID-FLOW AND HEAT-TRANSFER IN SEPARATING AND REATTACHING FLOWS .1. FLOW-FIELD CALCULATIONS [J].
ABE, K ;
KONDOH, T ;
NAGANO, Y .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1994, 37 (01) :139-151
[2]  
*ASC GMBH, 2009, MULT NAV STOK SOLV T
[3]   A microscale multi-inlet vortex nanoprecipitation reactor: Turbulence measurement and simulation [J].
Cheng, Janine Chungyin ;
Olsen, Michael G. ;
Fox, Rodney O. .
APPLIED PHYSICS LETTERS, 2009, 94 (20)
[4]   Investigation of turbulent mixing in a confined planar-jet reactor [J].
Feng, H ;
Olsen, MG ;
Liu, Y ;
Fox, RO ;
Hill, JC .
AICHE JOURNAL, 2005, 51 (10) :2649-2664
[5]  
Ferziger J.H., 2002, Computational methods for fluid dynamics, Vthird
[6]   CFD modelling of nano-particle precipitation in confined impinging jet reactors [J].
Gavi, E. ;
Rivautella, L. ;
Marchisio, D. L. ;
Vanni, M. ;
Barresi, A. A. ;
Baldi, G. .
CHEMICAL ENGINEERING RESEARCH & DESIGN, 2007, 85 (A5) :735-744
[7]   CFD modelling and scale-up of Confined Impinging Jet Reactors [J].
Gavi, Emmanuela ;
Marchisio, Daniele L. ;
Barresi, Antonello A. .
CHEMICAL ENGINEERING SCIENCE, 2007, 62 (08) :2228-2241
[8]   Turbulent precipitation in micromixers: CFD simulation and flow field validation [J].
Gavi, Emmanuela ;
Marchisio, Daniele L. ;
Barresi, Antonello A. ;
Olsen, Michael G. ;
Fox, Rodney O. .
CHEMICAL ENGINEERING RESEARCH & DESIGN, 2010, 88 (9A) :1182-1193
[9]   Precipitation of nanoparticles in a T-mixer: Coupling the particle population dynamics with hydrodynamics through direct numerical simulation [J].
Gradl, Johannes ;
Schwarzer, Hans-Christoph ;
Schwertfirm, Florian ;
Manhart, Michael ;
Peukert, Wolfgang .
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2006, 45 (10) :908-916
[10]  
Horn D, 2001, ANGEW CHEM INT EDIT, V40, P4331