MODELLING FLOW IN MONOFILAMENT FILTER CLOTHS:2.EFFECT OF WEAVE STRUCTURE AND NON-NEWTONIAN FLUID PROPERTIES ON PRESSURE LOSSES

摘要

In Part 1~1,we presented a 3-D finite element mathematical model for predicting Newtonian and non-Newtonian fluid flows through monofilament filter cloths.The model was shown to give theoretically consistent predictions,verified with purpose-designed test cases and experimental results of previous researchers.In this paper,we examine the effect of weave structure on the flow pattern in the interstices of woven media together with the associated pressure losses.Fluid flow through four basic pore types was examined,using a range of aperture to fibre diameter ratios.The effect of non-Newtonian fluid properties on pressure losses across the woven media was also investigated.Our results showed that Pore Type 1 gives the lowest pressure drop across the wire mesh while Pore Type 4 gives the highest pressure drop,consistent with the experimental results reported by earlier researchers.