“…Moreover, no solid‐solid contact occurs even during the squeezing stage of the oscillating motion. To ensure full hydrodynamic fluid film condition in the calculation, the minimum clearance was always maintained such that h min /μ≥3.92, where h min is the minimum nominal film thickness (Mustafa, 2007). The input parameters used in the calculation are as follows:- Radius of the rubber block, R: 49 mm.
- Thickness of the rubber block, L: 29.2 mm.
- Dynamic viscosity of silicone oil, η: 0.116 Pa.s.
- Density of silicone oil, ρ: 970 kg/m 3 .
- Amplitude of oscillation, a: 0.3 mm.
- Initial nominal film thickness, h o : 1.4 mm.
In Figure 4, the oscillating squeeze film pressure at the center of the rubber surface is presented as the integral average pressure across the squeeze film as a function of dimensionless time when the surface is smooth, frequency of oscillation is 20 Hz and the permeability, k is 2.63×10 −10 m 2 .…”