This paper discusses the apparent viscosity of crude palm oil, using rotary viscometer, under different
boundary conditions. It was experimentally shown that the apparent viscosity of palm oil drops with
increasing shear rate and temperature. However, the effect of temperature on the viscosity tends to
fade at temperatures beyond 80"C. A correlation between the apparent viscosity of crude palm oil and
the operating conditions was developed. The derived correlation represents well the experimental
data. This correlation can be used in design of crude palm oil settlers and in determining the optimum
operating conditions
