Abstract
This paper deals with a fundamental investigation of an electrostatic liquid filter. Aiming at clarifying the capturing mechanism of contaminants on a collector and the relationships between the quantity of captured particles and various factors, experiments have been conducted using a single fibre model which uses a single fibre as a simplified model of the collector. The effects of base oil and additive have been investigated. The experiments have revealed that the electrification characteristics of particles in oil are strongly affected by the type of base oil and additive, and that the form and quantity of deposition of particles on a collector differ considerably from one combination of base oil, additive and additive concentration to another.
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