MODELLING FLOW IN MONOFILAMENT FILTER CLOTHS:1.PREDICTION OF PRESSURE LOSSES

摘要

Monofilament woven cloths or screens are used as the media in filters or to enhance the integrity of the filter medium in,for example,filter cartridges.In this paper we present research results aimed at simulating non-Newtonian fluid flow through a woven cloth.Due to the complex geometry of a woven cloth,3-D modelling is necessary to correctly visualise the structure of the flow and hence to predict pressure losses.The modelling in a 3-D domain was handled using a finite element method which is known to cope effectively with flow domains in complex geometries.The simulation results were found to be in good agreement with experimental data,showing the developed model to be capable of generating accurate results for flow of both Newtonian and non-Newtonian fluids through filter media.