The paper presents results obtained using a transient analysis technique for point contact elastohydrodynamic lubrication (EHL) problems based on a formulation that effectively couples the elastic and hydrodynamic equations. Results are presented for transverse ground surfaces in an elliptical contact that show severe ®lm thinning at the transverse limits of the contact area. This thinning is c...

The paper presents results obtained using a transient analysis technique for point contact elastohydrodynamic lubrication (EHL) problems based on a formulation that couples the elastic and hydrodynamic equations. Results are presented for transverse ground surfaces in elliptical point contact that show severe film thinning and asperity contact at the transverse limits of the contact area. This ...

Stable hydrodynamic lubrication film is needed between the tooth profiles for smooth running and long life ofa single-screw compressor. This lubrication film is easily established with "straight line enveloping screw pair" rotors, but this kind of engagement pair is very difficult to machine. In this paper it is suggested that 11 a conical surface two-envelope engagement pair '' be used as the ...

We present a collision model for particle-particle and particle-wall interactions in interface-resolved simulations of particle-laden flows. Three types of interparticle interactions are taken into account: (1) long- and (2) short-range hydrodynamic interactions, and (3) solid-solid contact. Long-range interactions are incorporated through an efficient and second-order-accurate immersed boundar...

Abstract Minimizing NVH and friction-induced power losses is becoming paramount in the design of geared transmissions. The aim this paper to present an automatic methodology explore Pareto-optimal designs bevel gears when minimization noise frictional essential. In first part, a semi-empirical model estimate under elasto-hydrodynamic lubrication described. has been validated against experimenta...