...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...

... with the experiments, and also the 3D THD model could predict potential thermal instability observed in the experimental measurements. 22 09 2010 13 01 2011 22 03 2011 22 03 2011 convection electric power generation fuel cells machine bearings rotors solar cells stability...

... 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...

... a b convective heat transfer coefficient of bush housing k b thermal conductivity of bush housing k f thermal conductivity of the lubricant n rotational speed of the bearing p oil film pressure u , v , w components...

... the shaft is very small (less than 2 ° C ) in the circumferential direction due to the large amount of the convection brought about because of the shaft rotation. Figure 7 shows a series of two-dimensional plot for the film thickness, density ratio, pressure, and temperature at several...

... 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...

..., convective heat transfer, and variable load direction condition in the thermally induced seizure is discussed in light of the numerical results. 01 09 2008 14 12 2008 06 03 2009 convection finite element analysis friction machine bearings oscillations thermomechanical treatment...

...-relaxation within the iterations is needed for a successful convergence. In the numerical solution of the energy equation, backward differences are used for convective terms because the value of velocity appears to be negative at some positions, which means that reverse flow occurred ( 11 ), 14 u...

... 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...

... of the heat flows. All other calculations presented in this paper are conducted with a leading-edge taper. 14 06 2006 19 06 2007 convection high-pressure effects liquid films lubricating oils lubrication machine bearings tilting-pad thrust bearing mathematical model oil...

... non-Newtonian fluids machine bearings channel flow 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...

... 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 for this application ( 20 ): 22 Nu = 0.6774 ( Re L...

... 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...

.... Wang (Assoc. Ed.). 19 November 2003 29 April 2004 09 11 2004 machine bearings deformation elastodynamics numerical analysis convection thermal expansion Nowadays, most hydrodynamic journal bearings are required to operate with increasing temperatures...