|
 |
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.
|
<Previous article
|
Next article>
|
COMPUTATION AND EVALUATION OF WALL SHEAR STRESS DISTRIBUTION AT THE LOWER SURFACE OF A RADIAL FLOW CELL
J. G. Detry, Food Technology Department, Gembloux Agricultural University, Passage des Déportés, 2, 5030 Gembloux, Belgium
B. B. B. Jensen, Department of Food Process Engineering, BioCentrum-DTU, Technical University of Denmark, Soltofts Plads Building 221, 2800 Lyngby, Denmark
C. Deroanne, Food Technology Department, Gembloux Agricultural University, Passage des Déportés, 2, 5030 Gembloux, Belgium
M. Sindic, Food Technology Department, Gembloux Agricultural University, Passage des Déportés, 2, 5030 Gembloux, Belgium
ABSTRACT:
In the present work, the flow in the radial-flow cell was
analyzed for an aspect ratio of 1 with inlet pipe Reynolds
numbers of 950, 2 000 and 4 100. Two models were applied
to compute the wall shear stress distribution at the lower
surface, at any distance from the center. Stainless steel and
polystyrene surfaces were soiled with oil and starch and the
detachment of these soils was assessed by measuring the
detachment radius in a radial-flow cell. The experimental
radii were introduced in the models and converted into wall
shear stress. Comparisons of the various sets of data suggest
that soil removal was not controlled by wall shear stress
alone. Satisfactory estimations of the wall shear stress could
be obtained at low radial positions for laminar flow, pointing
out the usefulness of CFD for the computation of the critical
wall shear stress when soil removal occurs in this region
J. G. Detry, B. B. B. Jensen, C. Deroanne, and M. Sindic, "COMPUTATION AND EVALUATION OF WALL SHEAR STRESS DISTRIBUTION AT THE LOWER SURFACE OF A RADIAL FLOW CELL" 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/heatexchanger2007/41
|
|
|
|
 |
|
|
|
|
|
|
|
