Effects of the Turbulent-to-Laminar Transition in Monolithic Reactors for Automotive Pollution Control
Artikel i vetenskaplig tidskrift, 2011

In the current work a detailed study is performed of the turbulent-to-laminar transition at the inlet of an automotive monolithic reactor. The effects of the transition on the conversion of gaseous species and on the deposition of particulate matter are investigated using numerical simulations. Two main effects of the turbulence on the conversion in the monolith have been identified: slow fluctuations due to turbulent eddies that are too large to enter the channels and rapid fluctuations due to smaller turbulent eddies that penetrate the channels. It is also shown that inertial particles may deposit inside the monolith channels, providing a likely explanation of the experimentally observed spatial deposition profiles of elements that chemically deactivate automotive catalysts.

Automotive catalysis

Turbulence

Turbulent-to-laminar transition

Författare

Henrik Ström

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Srdjan Sasic

Chalmers, Tillämpad mekanik, Strömningslära

Bengt Andersson

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Kompetenscentrum katalys (KCK)

Industrial & Engineering Chemistry Research

0888-5885 (ISSN) 1520-5045 (eISSN)

Vol. 50 3194-3205

Drivkrafter

Hållbar utveckling

Ämneskategorier

Kemiska processer

Kemiteknik

Strömningsmekanik och akustik

Fundament

Grundläggande vetenskaper

DOI

10.1021/ie102291t