Elastohydrodynamic properties of water in oil emulsions

Layered flow in slider bearings

“…It is believed that only the deposited oil phase is entrained to form thick oil films. Hamaguchi et al (2) and Dalmaz and Godet (3) found similar behaviour of water-in-oil (w=o) emulsions. Dow (4), using an X-ray transmission technique, and Wang et al Experimental data on the behaviour of bearings lubricated with high water-based fluids are not readily available and of necessity the designer has to rely on theoretical predictions.…”

An efficient thermal analysis for the prediction of minimum film thickness in inlet zone at high speed lubricated cold strip rolling

“…(Azushima, 1978) have been used for validation of present mathematical model. It is essential to mention here that the use of oil-in-water emulsion does not lead to an oil film thickness that is significantly different than found with neat oils (Hamaguchi et al, 1977;Wan et al, 1984;Shirizly and Lenard, 2000). Thus, the present findings of minimum film thickness may be used for emulsions as well as for neat oils having general ambient temperature.…”

“…Authors believe based on the findings of Refs. (Hamaguchi et al, 1977;Wan et al, 1984;Shirizly and Lenard, 2000) that the minimum film thickness relations presented in this work may be used for both neat oils and emulsions. Authors expect these relations will compute accurate results at low rolling speeds (less than 1 m/s) with oil-in-water emulsions.…”

“…Refs. (Hamaguchi et al, 1977;Wan et al, 1984) have reported that the EHL film thickness is almost independent of water concentration and droplet size distribution. Though the bulk viscosity of the emulsion is heavily dependent upon these two variables (concentration and droplet size).…”

Impact of Water on EHL Film Thickness of Lubricating Greases in Rolling Point Contacts

“…However, there is more known on EHL films for water in oil emulsions [6][7][8][9][10][11]. Hamaguchi et al [6] showed the EHL film thickness in rolling contacts to be insensitive to the water concentration in liquid paraffin and mineral oil emulsions. On the contrary, Dalmaz [7] found higher film thicknesses for water in oil emulsions in pure rolling and no effect under pure sliding.…”