Momentum Transfer in Short-Channel Structures of Hexagonal Channel Cross-Section Shape: Experiments vs. CFD

Katarzyna Sindera,Przemysław Jodłowski,Marzena Iwaniszyn

doi:10.3390/catal11091036

Abstract

Short-channel structures are promising catalyst carriers because it is easy to control the heat/mass transfer and fluid flow characteristics by changing their lengths. In this work, the flow resistance of hexagonal structures was investigated experimentally and numerically. The structure tested (6 mm long) was manufactured from AISI 316 steel using the selective laser melting technique. Due to some differences between theoretical approaches and practical results, two types of computational models were applied to analyze the pressure distribution in a short hexagonal duct. It was shown that although experimental results agree with some theoretical solutions, the channel wall thickness should not be omitted from the overall flow resistance. A comparison of short structures differing in channel length with widely used long monoliths was performed as well.

Highlights

Hexagonal Channel Cross-SectionNowadays, many harmful substances are still released into the atmosphere
It has been estimated that around 3.22 million people died globally as a result of diseases caused by air pollution in 2010 alone [2]
The research described in this paper focuses on a new type of catalytic carriers called short-channel structures, which was proposed by Kołodziej et al [6,7]

Summary

Introduction

Many harmful substances are still released into the atmosphere. Examples of such emissions are: methane, nitrogen oxides, sulfur oxides, volatile organic compounds and particulate matter (PM2.5 and PM10 ). The effects of such emissions are significant both for the environment and for the organisms living in it. It has been estimated that around 3.22 million people died globally as a result of diseases caused by air pollution in 2010 alone [2]. Taking into account the annual global production of cars (50 million units) and the estimated increase in the number of used cars in the world

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Discussion

Conclusion