Flow through catalytic converters - laser Doppler anemometry versus computational fluid dynamics

N.S. Girgis; Stephen F. Benjamin; T.S. Jasper; D.H. Cuttler; M.J. Davies

Flow through catalytic converters - laser Doppler anemometry versus computational fluid dynamics

N.S. Girgis, Stephen F. Benjamin, T.S. Jasper, D.H. Cuttler, M.J. Davies

Faculty of Engineering, Environment & Computing

Research output: Chapter in Book/Report/Conference proceeding › Chapter

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Abstract

Using laser Doppler anemometry (LDA) techniques, the flow velocities have been measured for a sudden pipe expansion into a square duct containing a catalyst situated downstream of the expansion. This geometry has been modelled using the computational fluid dynamics (CFD) code FLOW3D from Harwell. The results of the LDA data have been compared to those predicted by the CFD code. The CFD simulations are close to the experimental data though the CFD results predict more mal-distribution than observed with the LDA technique. Changing the turbulence modelling from the k-epsilon model to the Algebraic Reynolds Stress model improved the predictions significantly, with the magnitude of the recirculation matching the experimental data more closely. It was also found that the solution was not wholly grid independent, though variations were small.

Original language	English
Title of host publication	Proceedings of the Ninth International Conference on Systems Engineering
Publisher	University of Nevada, Las Vegas
Publication status	Published - 1993

Bibliographical note

Paper presented at the Ninth International Conference on Systems Engineering (ICSEng 93), University of Nevada, Las Vegas, 14-16 July 1993.

Keywords

catalytic converters
computational fluid dynamics
laser Doppler anemometry

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title = "Flow through catalytic converters - laser Doppler anemometry versus computational fluid dynamics",

abstract = "Using laser Doppler anemometry (LDA) techniques, the flow velocities have been measured for a sudden pipe expansion into a square duct containing a catalyst situated downstream of the expansion. This geometry has been modelled using the computational fluid dynamics (CFD) code FLOW3D from Harwell. The results of the LDA data have been compared to those predicted by the CFD code. The CFD simulations are close to the experimental data though the CFD results predict more mal-distribution than observed with the LDA technique. Changing the turbulence modelling from the k-epsilon model to the Algebraic Reynolds Stress model improved the predictions significantly, with the magnitude of the recirculation matching the experimental data more closely. It was also found that the solution was not wholly grid independent, though variations were small.",

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AU - Girgis, N.S.

AU - Benjamin, Stephen F.

AU - Jasper, T.S.

AU - Cuttler, D.H.

AU - Davies, M.J.

N1 - Paper presented at the Ninth International Conference on Systems Engineering (ICSEng 93), University of Nevada, Las Vegas, 14-16 July 1993.

PY - 1993

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N2 - Using laser Doppler anemometry (LDA) techniques, the flow velocities have been measured for a sudden pipe expansion into a square duct containing a catalyst situated downstream of the expansion. This geometry has been modelled using the computational fluid dynamics (CFD) code FLOW3D from Harwell. The results of the LDA data have been compared to those predicted by the CFD code. The CFD simulations are close to the experimental data though the CFD results predict more mal-distribution than observed with the LDA technique. Changing the turbulence modelling from the k-epsilon model to the Algebraic Reynolds Stress model improved the predictions significantly, with the magnitude of the recirculation matching the experimental data more closely. It was also found that the solution was not wholly grid independent, though variations were small.

AB - Using laser Doppler anemometry (LDA) techniques, the flow velocities have been measured for a sudden pipe expansion into a square duct containing a catalyst situated downstream of the expansion. This geometry has been modelled using the computational fluid dynamics (CFD) code FLOW3D from Harwell. The results of the LDA data have been compared to those predicted by the CFD code. The CFD simulations are close to the experimental data though the CFD results predict more mal-distribution than observed with the LDA technique. Changing the turbulence modelling from the k-epsilon model to the Algebraic Reynolds Stress model improved the predictions significantly, with the magnitude of the recirculation matching the experimental data more closely. It was also found that the solution was not wholly grid independent, though variations were small.

KW - catalytic converters

KW - computational fluid dynamics

KW - laser Doppler anemometry

M3 - Chapter

BT - Proceedings of the Ninth International Conference on Systems Engineering

PB - University of Nevada, Las Vegas

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