...Guy Bayada; Laurent Chupin; Sébastien Martin In this paper, an asymptotic expansion is used to derive a description of Phan–Tien– Tanner (PTT)/Oldroyd-B flows in the thin film situation without the classical “upper convective maxwell”(UCM) assumption. We begin with a short presentation of the Phan...

... flow rate to the bearing could not be measured. Therefore, the plenum pressure and temperature were directly measured using pressure transducer and thermocouple, and they were used as the boundary conditions for the cooling air flow, hydrodynamic solution of the air film, and convection heat transfer...

... for modeling the thermal aspects of the engagement process in a wet clutch. The thermal model includes full consideration of the viscous heat dissipation in the fluid as well as heat transfer into the separator, the friction material, and the core disk. The convective terms in the energy equations for the oil...

.... 28 07 2009 11 01 2010 14 04 2010 14 04 2010 convection foils machine bearings rotors turbomachinery air foil bearing microturbomachinery THD analysis Environment-friendly microturbomachinery, with power ranges less than 1 MW (from definition of the Gas...

... ) | r = R 2 = − k f ⋅ | ( ∂ T ∂ z ) | z = 0 5 On the outer part of the housing. The free convection and radiation hypothesis give 19 | ( ∂ T b ∂ r ) | r = R 3 = − h a b k b ⋅ ( T b...

... by conduction and convection to assist in the design and troubleshooting of rotor-GFB systems operating hot. Bearing temperatures and shaft motions measurements are obtained in a test rotor electrically heated to 132 ° C . In speed-up tests to 26 krpm, the rotor motion amplitude drops suddenly just above...

... thermohydrodynamic model that appropriately takes into account the film rupture and reformation. An extensive set of numerical solutions are presented to closely examine the effects of misalignment in journal bearings. 07 06 2009 14 09 2009 11 11 2009 11 11 2009 cavitation convection...

..., convective heat transfer, and variable load direction condition in the thermally induced seizure is discussed in light of the numerical results. Comparison of surface temperature distribution at steady state by the present method and analytical solution Favorable comparisons of the results shown...

.... A three-dimensional temperature prediction of air film is presented, and a comparison of THD to isothermal results is made to emphasize the importance of thermal effects. Finally, published experimental data are used to validate this numerical solution. convection finite element analysis lubricants...

... equation used considers the effects of heat conduction and convection, viscous heating, and the heat of evaporation. The developed method has been applied to a series of cases of lubricated metal-on-metal line contact with an entrainment velocity of u ent = 2.5 m ∕ s , viscosities η 0 = [ 0.01 , 1 ] Pa s...

... injection is turned off, as well as with situations where it is turned on for hydrostatic jacking. convection high-pressure effects liquid films lubricating oils lubrication machine bearings tilting-pad thrust bearing mathematical model oil injection pocket thermohydrodynamic lubrication...

... friction convection numerical analysis non-Newtonian lubricants thermohydrodynamic lubrication slider bearing flow channel flow Several theoretical and computational studies have been performed to evaluate the effect of non-Newtonian behavior (modeled as generalized Newtonian fluids (GNF...

.... This cooling effect was incorporated in the present analysis by estimating the Nusselt numbers of the cooling air and deriving the corresponding forced convection heat transfer coefficients, h conv , at the outer surface of the top foil. The following relation was used to evaluate the Nusselt number...

... the pad is taken into account by solving the Laplace equation with convective boundary conditions that are realistic. The runner’s temperature, assumed constant, is determined by imposing a zero value for the global heat flux balance. The constructed model gives the pressure distribution and velocity...

.... Associate Editor: C. H. Venner. 21 March 2003 05 October 2004 07 02 2005 non-Newtonian flow non-Newtonian fluids numerical analysis lubrication elastodynamics viscosity rheology sliding friction convection stress-strain relations mechanical contact thermal analysis...

... of contacting surfaces. The change in temperature at a contact area may be attributed to the combined effects of frictional heating and convective cooling. This paper presents a transient, three-dimensional solution for the normal surface displacement of an elastic half-space due to an arbitrarily distributed...

... pressures in the squeeze film are obtained from the equation of motion, which includes both local and convective inertia terms, and the continuity equation, using the perturbation method. Experimental data on the squeeze-film pressures and forces are also obtained under the sinusoidal squeezing motion...

..., i.e., z = 0 and z = L ) are considered to be subjected to a free-convection thermal exchange with the external environment. Varying in the axial direction, the shaft temperature is assumed to be constant along the circumferential direction because of the rotational speed...