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Heat Exchanger Fouling and Cleaning VII
July 1-6, 2007 - Tomar, Portugal
| Editors: |
Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada |
The articles for these proceedings are peer-reviewed.
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FLUID DYNAMIC GAUGING IN DUCT FLOWS – EXPERIMENTS AND CFD SIMULATIONS
T. Gu, Dept. of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, Cambridge CB2 3RA, UK
Y.M.J. Chew, Dept. of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, Cambridge CB2 3RA, UK
W.R. Paterson, Dept. of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, Cambridge CB2 3RA, UK
D.I. Wilson, Dept. of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, Cambridge CB2 3RA, UK
ABSTRACT:
The technique of fluid dynamic gauging (FDG) has
been developed to measure the thickness of deformable
foulant deposits on solid immersed in liquid, in real time
and in situ, with a precision of ± 10 micron. Suction is
imposed across a gauging nozzle; the flow rate of liquid
through the nozzle allows calculation of the proximity of
the nozzle to the surface of the deposit. The technique has
been demonstrated by Tuladhar et al. (2000) to work well in
quasi-static situations, where the bulk liquid is not moving
apart from the gauging flow, and in duct flows.
FDG in the quasi-static mode has recently been
extended by Chew and co-workers (2004a) using
computational fluid dynamics (CFD) simulations of the
gauging flow fields to allow the forces imposed on the
foulant to be estimated, and thereby test its mechanical
strength. We term this technique ‘enhanced FDG’.
This paper describes the extension of enhanced FDG to
simple duct flows, which requires numerical solution of the
governing fluid flow equations in the geometries under
consideration. The geometry is that employed by Tuladhar
et al. (2003), namely a long duct of square cross-section.
The experimental results of the present study are compared
with the experimental results from Tuladhar et al. (2003)
and Chew et al. (2004b). The CFD results of the study are
mainly compared with the present experimental results and
with the numerical results from Chew et al. (2004a).
T. Gu, Y.M.J. Chew, W.R. Paterson, and D.I. Wilson, "FLUID DYNAMIC GAUGING IN DUCT FLOWS – EXPERIMENTS AND CFD SIMULATIONS" in "Heat Exchanger Fouling and Cleaning VII", Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada
Eds, ECI
Symposium Series, Volume RP5 (2007). http://services.bepress.com/eci/heatexchanger2007/42
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