Prediction of Cleaning by Means of Computational Fluid Dynamics: Implication of the Pre‐wetting of a Swellable Soil
Authors:
- 19 January 2019
- journal article
- conference paper
- Published by Taylor & Francis in Heat Transfer Engineering
- Vol. 41 (2) , 178-188
Abstract
The cleaning behavior of a pre-wetted soil is studied experimentally and modeled numerically for the prototypical case of plane channel flow. One of the channel walls is soiled with a food-based model soil containing luminescent tracer particles to perform space- and time-resolved investigations of the cleaning process. Pre-wetting is applied for a few minutes before the soil removal is started with flow of Reynolds number up to 20,000. Physical model and simulation are based on a transient boundary condition to represent the behavior of the soil. Pre-wetting is taken into account by an initial removal of a certain amount of soil due to cohesive separation and the subsequent cleaning modeled as being limited by a diffusive process. Compared to a conventional multiphase simulation, the computation time is lowered by about three orders of magnitude. The results obtained with this elementary approach match the experiments astonishingly well.Keywords
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