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Experimental-Numerical Analysis of Mass Transfer in Standard and Longitudinal Structured (LS) Substrates
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 20, 2009 by SAE International in United States
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The design of compact and efficient Diesel Oxidation Catalysts (DOC) is primarily important to comply with emission regulations not increasing engine fuel consumption at the same time.
To design DOCs, Sherwood number correlations are typically used to calculate mass transfer by varying operating conditions in terms of catalyst volume, active area and mass flow rate. To that aim, Sherwood number trend over channel length has been extensively studied during last decades. However, Sherwood number correlations are highly dependent on channel geometry, and on the possible presence of special structures (such as blades, fins or bumps). These modifications, which characterize the latest developments in substrate technology, allow to improve mass transfer performance and require a special characterization.
In this paper, a joint experimental/3D-numerical approach is used to study the role of special structures, and namely of LS (Longitudinal Structure) blades, on mass transfer mechanism inside a DOC. It is proved that the generation of unsteady/turbulent flow structures due to the inclusion of blades is essential in LS substrate, and leads already at Re in the order of 700 to an underestimation of the performance by using a steady state laminar 3D model. Re dependent Sherwood correlations are then proposed for standard and LS substrates, to calculate mass transfer between the bulk and the wall of a given channel by varying operating conditions (channel length, channel density, mass flow rate) taking also into account unsteady/turbulent effects.
CitationCordiner, S., Mariani, A., and Mulone, V., "Experimental-Numerical Analysis of Mass Transfer in Standard and Longitudinal Structured (LS) Substrates," SAE Technical Paper 2009-01-1270, 2009, https://doi.org/10.4271/2009-01-1270.
- Yun H. Sellnau M. Milovanovic N. Zuelch S. 2008 “Development of Premixed Low-Temperature Diesel Combustion in a HSDI Diesel Engine” SAE paper 2008-01-0639
- Konieczny R. Muller W. Cherington B. Presti M. Jayat F. Davies M.J. Murphy P.R. 2008 “PTC-Catalytic Performances on an Euro V Type Diesel Engine and Robust Design Development” SAE Paper 2008-01-0768
- Andreassi L. Cordiner S. Mulone V. 2004 “Cell Shape Influence on Mass Transfer and Backpressure Losses in An Automotive Catalytic Converter” SAE paper 2004-01-1837
- Khinast J.G. Bauer A. Bolz D. Panarello A. 2003 “Mass-Transfer Enhancement by Static Mixers in a Wall-Coated Catalytic Reactor“” Chem. Eng. Science 58 1063 1070
- Hobbs D.M. Muzzio F.J. 1997 “The Kenics Static Mixer: a Three Dimensional Chaotic Flow” Chem. Eng. J 67 153 166
- Fang J.Z. Lee D.J. 2001 “Micromixing Efficiency in Static Mixer” Chem. Eng. Science 56 3797
- Downey M. Muller-Haas K. Park T. Diewald R. Radovanovic R. 2007 “Structured Foil Catalysts: A Road Map to Highly Effective, Compact Aftertreatment Systems” SAE paper 2007-01-4038
- Incropera F.P. DeWitt D.P. 2006 “Fundamentals of Heat and Mass Transfer” John Wiley & Sons
- Hausen H. 1943 VDI Beih. Verfahrenstech. 4 91
- Kakac S. Yener Y. 1995 “Convective Heat Transfer” CRC Press Inc.
- Brück R. Hirth P. Maus W. Deutschmann O. Mladenov N. Fundamentals of “Laminar” and “Turbulent” Catalysis; “Turbulent” beats “Laminar” 2006 27. Internationales Wiener Motorensymposium
- Arrighetti C. Cordiner S. Mulone V. 2007 “Heat and Mass Transfer Evaluation in the Channels of an Automotive Catalytic Converter by Detailed Fluid-Dynamic and Chemical Simulation” ASME J. Heat Transfer 129 536
- Cordiner S. De Simone G. Mulone V. 2007 “Influence of Washcoat Distribution on the Performance of Diesel Oxidation Catalysts” SAE paper 2007-01-4007
- Kays, W.M. 1955 “Numerical Solutions for Laminar-Flow Heat Transfer in Circular Tubes” Trans. ASME 77 1265 1274
- Bhattacharya M. Harold M.P. Balakotaiah V. 2004 “Mass-Transfer Coefficients in Washcoated Monoliths” AIChe Journal 50 2939
- Van Male P. de Croon M.H.J.M. Tiggelaar, van den Berg A. Schouten J.C. 2004 “Heat and Mass Transfer in a Square Microchannel with Asymmetric Heating” Int. J. Heat and Mass Transfer
- Hayes R.E. Liu B. Moxom R. Votsmeier M. 2004 “The Effect of Washcoat Geometry on mass transfer in monolith reactors” Chem. Eng. Sci.
- Miyari Y. Aoki T. Yamamoto M. Abe F. 2003 “Effect of Cell Shape on Mass Transfer and Pressure Loss” SAE paper 2003-01-0659
- Hirschfelder, O. Curtiss, C. F. Bird R. B. 1954 Molecular Theory of Gases and Liquids John Wiley and Sons New York
- Hayes, R. E. Kolaczkowski S. T. 1999 “A study of Nusselt and Sherwood numbers in a monolith reactor,” Cat. Today 47 295 303
- Oertel H. Jr. 1990 “Wakes Behind Blunt Bodies” Annual Review of Fluid Mechanics 22 539 564
- Bolling M. Liebl J. Zimmer R. Kraum M. Seel O. Siemund S. Burck R. Diringer J. Maus W. “Next generation catalysts are turbulent: development of support and coating” SAE paper 2004-01-1488
- Baehr, H. Stephan, K. 1998 “Heat Transfer” Springer-Verlag