Abstract
Creosote is used commercially as a timber preservative. Previous studieshave shown that a modified Quemada model can be used to describe steadyshearflow behaviour creosote-in-water (O/W) and water-in-creosote (W/O) emulsions at moderate shear rates. This paper investigates the flow of O/Wemulsions in straight and square-wave capillaries at high shear rates, as a preludeto predicting timber treatability. This emulsion exhibits slip at the wallwhen flowing through a straight capillary, as is the case with some suspensions.A pipe flow equation based on the modified Quemada model has been develpedto predict flow rate against applied pressure drop. A modification of this equation, making use of a geometric parameter technique, can also be used to predictflow in square wave tubes.
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