Direct numerical simulation of a particle-laden mixing layer with a chemical reaction

2005 ◽  
Vol 31 (7) ◽  
pp. 843-866 ◽  
Author(s):  
Takenobu Michioka ◽  
Ryoichi Kurose ◽  
Kouichi Sada ◽  
Hisao Makino
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Chemical Reaction ◽  
Mixing Layer

Diffusion and Mixing in Microchannel Analyzed by the Luminol Chemiluminescence

2013 ◽  
Author(s):  
Ruru Matsuo ◽  
Ryosuke Matsumoto
Keyword(s):  
Numerical Simulation ◽  
Chemical Reaction ◽  
Reaction Rate ◽  
Mixing Layer ◽  
Fluorescence Technique ◽  
Chemiluminescence Intensity ◽  
Luminol Chemiluminescence ◽  
Chemical Reaction Rate ◽  
Pdms Chip ◽  
Reaction Profile

This study focused on the diffusion and mixing phenomena investigated by using luminol chemiluminescence (CL) to estimate the local chemical reaction rate in the T-junction microchannel. Generally, the degree of mixing in microchannel is calculated by the deviation of the obtained concentration profiles from the uniform concentration profile by using fluorescence technique. Thus, the degree of mixing is a macroscopic estimate for the whole microchannel, which is inappropriate for understanding the diffusion and mixing phenomena in the mixing layer. In this study, the luminol CL reaction is applied to visualize the local chemical reaction and to estimate the local diffusion and mixing phenomena at an interface between two liquids in microchannel. Luminol emits blue chemiluminescence when it reacts with the hydrogen peroxide at the mixing layer. Experiments were carried out on the T-junction microchannel with 200 microns in width and 50 microns in depth casted in the PDMS chip. The chemiluminescence intensity profiles clearly show the mixing layer at an interface between two liquids. The experimental results are compared with the results of numerical simulation that involves solving the mass transport equations including the chemical reaction term. By calibrating CL intensity to the chemical reaction rate estimated by the numerical simulation, the local chemical reaction profile can be quantitatively estimated from the CL intensity profile.

Numerical Simulation for Free Turbulent Reacting Flow by Particle Method

2003 ◽  
Author(s):  
Tomomi Uchiyama ◽  
Naohiro Otsuki
Keyword(s):  
Numerical Simulation ◽  
Chemical Reaction ◽  
Mixing Layer ◽  
Particle Method ◽  
Reacting Flows ◽  
Single Step ◽  
Reacting Flow ◽  
Turbulent Reacting Flows ◽  
Plane Mixing Layer ◽  
Irreversible Chemical Reaction

This paper presents a particle method for free turbulent reacting flows. The vorticity and concentration fields are discretized into the vortex and concentration elements, respectively, and the behavior of the elements is calculated with the Lagrangian method. The chemical reaction is estimated through the Lagrangian calculation for the strength of concentration element. The particle method is applied to simulate a plane mixing layer with a single-step and irreversible chemical reaction of non-premixed reactants so as to discuss the applicability.

scholarly journals Shocks in direct numerical simulation of the confined three‐dimensional mixing layer

1995 ◽  
Vol 7 (9) ◽  
pp. 2105-2107 ◽  
Author(s):  
Bert Vreman ◽  
Hans Kuerten ◽  
Bernard Geurts
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Mixing Layer ◽  
Three Dimensional

scholarly journals Analysis on Retardation of Momentum Transport in a Mixing Layer using Direct Numerical Simulation.

1997 ◽  
Vol 63 (606) ◽  
pp. 404-409
Author(s):  
Shuichiro HIRAI ◽  
Toshimi TAKAGI ◽  
Taichi TANIGUCHI ◽  
Junichi KAIDA
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Mixing Layer ◽  
Momentum Transport

Direct numerical simulation of gas-solid two-phase mixing layer

2005 ◽  
Vol 14 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Wenchun Li ◽  
Guilin Hu ◽  
Zhe Zhou ◽  
Jianren Fan ◽  
Kefa Cen
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Mixing Layer ◽  
Two Phase ◽  
Phase Mixing

scholarly journals Direct numerical simulation of a turbulent mixing layer with a transversely oscillated inflow

2015 ◽  
Vol 10 (1) ◽  
pp. JFST0004-JFST0004 ◽  
Author(s):  
Yukinori KAMETANI ◽  
Masayuki KAWAGOE ◽  
Koji FUKAGATA
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Turbulent Mixing ◽  
Mixing Layer ◽  
Turbulent Mixing Layer
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