Temperature dependence of the viscosity of water-fuel oil emulsions

Abstract

The experimental dependence of the kinematic viscosity of oil-water emulsions on temperature was examined. Oil-water emulsions with a high water content (up to 60%) were prepared by long-term mechanical stirring in a cylindrical vessel using a screw with metal brushes. The Stokes method was used to determine the viscosity. Emulsions are opaque liquids. Therefore, the movement metal ball's time between the upper and lower layers of liquid was determined. At the same time, there was a layer of water under the emulsion in the tube. To measure the viscosity at different temperatures, the system was placed in a larger flask through which heated water was pumped. As a result, it was experimentally shown that the fuel oil viscosity is lower than oil-water emulsions viscosity (at the same temperatures). As the water content in the emulsion increases, its viscosity increases. In order to meet the conditions of optimal sprey of WOE (as well as other similar fuels), they must be heated to temperatures higher than those recommended for pure (non-emulsified) fuel oil.