Effects of the Turbulent-to-Laminar Transition in Monolithic Reactors for Automotive Pollution Control
Journal article, 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


Turbulent-to-laminar transition


Henrik Ström

Competence Centre for Catalysis (KCK)

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Srdjan Sasic

Chalmers, Applied Mechanics, Fluid Dynamics

Bengt Andersson

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Competence Centre for Catalysis (KCK)

Industrial & Engineering Chemistry Research

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

Vol. 50 6 3194-3205

Driving Forces

Sustainable development

Subject Categories

Chemical Process Engineering

Chemical Engineering

Fluid Mechanics and Acoustics


Basic sciences



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