A theoretical study of combined effects of non-Newtonian rheology and viscosity-pressure dependence in the sphere-plate squeeze-film system

Flow and heat transfer of couple stress fluid in a porous channel with expanding and contracting walls

“…Application of the couple stress model to biomechanics problems has been proposed in the study of peristaltic transport by Srivastava [17], Shehawey and Mekheimer [18] and blood flow in the microcirculation by Dulal Pal et al [19]. In lubrication problems many authors have investigated the couple stress effects on different lubrication problems (Chiang et al [20], Naduvinamani et al [21], Jian et al [22], Lu et al [23]). …”

Effect of Surface Roughness and Viscosity-Pressure Dependency on the Couple Stress Squeeze Film Characteristics of Parallel Circular Plates

“…The roughness parameter * signifies the effect of surface roughness resulting from the large vertical deviations of a real surface. The limiting case * → 0 is the circular squeeze film plates under the viscous, non-Newtonian couple stress fluids corresponding to smooth case studied by Lu and Lin [21]. In the present study squeeze film characteristics are presented with = 0.05, couple stress parameters within the range of = 0.0∼0.2, and roughness parameter within the range * = 0.0∼0.3.…”

“…According to the study by Gould [20], the variation of viscosity with pressure is important especially in the high pressure squeeze films. Lin et al [21,22] analyzed the theoretical study of combined effects of non-Newtonian couple stress rheology and viscosity pressure dependency (VPD) in the sphere plate squeeze film and squeeze film circular plates. Reddy et al [23] predicted the effect of viscosity variation on the squeeze film performance of narrow hydrodynamic journal bearings with couple stress fluid.…”

Investigation of Combined Effects of Rotational Inertia and Viscosity–Pressure Dependency on the Squeeze Film Characteristics of Parallel Annular Plates Lubricated by Couple Stress Fluid

“…On the other hand, by making use of the Barus [12] experimental research, the variation of viscosity of an incompressible lubricant increases exponentially with its pressure. A lot of research for squeeze film characteristics has been carried out by using Barus' formula such as in Bartz and Ether [13], Lu and Lin [14] and Lin et al [15]. Recently, Lin et al [16] studied the effects of viscositypressure dependency on the non-Newtonian squeeze film characteristics between parallel circular plates.…”