3 Results and discussion
3.1 Pressure and film distributions
In this section, we first present the typical pressure distributions and film profiles of fully-flooded and starved regimes to show how the starvation effects the characteristics of the mixed elastohydrodynamic lubrication.
3.1.1 Line contact
Fig. 1 shows the hydrodynamic and asperity pressure distributions and the corresponding film profiles in rough line-contact EHL. In this figure, a fully-flooded case (ξ=0) is compared with two starved regimes: 10% starvation (ξ=0.1) and 20% starvation (ξ=0.2). The dimensionless input parameters are W=5×10−5, U=1×10−11, G=4972, =2×10−5, and V=0.01. The selected dimensionless load causes a maximum Hertzian pressure of about 0.64 GPa (for steel). The selected dimensionless roughness corresponds to the roughness of moderately rough surfaces (equal to the combined roughness of about σ=0.5 μm for the effective radius of 1 in.).