Laminar heat transfer in the "MLLM" static mixer

被引：18

作者：

Creyssels, Mathieu ^{[1
]}

Prigent, Simon ^{[1
]}

Zhou, Yixian ^{[1
]}

Xin Jianjin ^{[1
]}

Nicot, Christian ^{[1
]}

Carriere, Philippe ^{[1
]}

机构：

[1] Univ Lyon 1, INSA Lyon, Ecole Cent Lyon, Lab Mecan Fluides & Acoust,UMR CNRS 5509, F-69134 Ecully, France

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2015年 / 81卷

关键词：

Static mixer; Chaotic advection; Heat transfer efficiency; CHAOTIC ADVECTION; FLOW; FLUID; SIMULATION; MOTION; PIPE;

D O I：

10.1016/j.ijheatmasstransfer.2014.10.064

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The multi-level laminating mixer (MLLM) is a static mixer whose concept is based on a three-dimensional implementation of the baker's transformation. The present work is a first attempt to study the MLLM from the viewpoint of heat transfer efficiency. Both numerical and experimental investigations using water as inner (hot) fluid are presented. One of the key results is that the Nusselt number averaged over each basic element forming the MLLM remains approximately constant whatever the element location, a behavior we relate to the cutting/stacking mechanism. Now, for the studied range of Reynolds numbers (10-3000), the flow is no longer restricted to the baker's transformation and the analysis reveals the presence of Dean vortices in the succession of elbows. These vortices have a strong influence on heat transfer, in accordance with many works of the literature: the Nusselt number of each element asymptotically increases as the square root of the Reynolds number for sufficiently high Peclet numbers. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：774 / 783

页数：10

共 42 条

[31] Mixed convection in straight and curved channels with buoyancy orthogonal to the forced flow [J].