[Back]

{$\underline{I. A. Neac{\&}{\#}537;u}$}, B. Scheichl: 
''Investigation of Highly Loaded Sintered Bearings Under the Effect of Vaporous Cavitation''; 
Talk: British Applied Mathematics Colloquium (BAMC) 2012, University College London, UK; 2012-03-27 - 2012-03-29.

@unpublished{neacșu12[TUW-206763],
    author = {Neac{\&}{\#}537;u, Ioana Adina and Scheichl, Bernhard},
    title = {Investigation of Highly Loaded Sintered Bearings Under the Effect of Vaporous Cavitation},
    year = {2012},
    keywords = {cavitation, lubrication theory, porous journal bearings, recondensation, saturation jump},
    abstract = {A common phenomenon occurring during the operation of insulated porous journal bearings (having a sintered seat) is the rupture of the lubricant film caused by a decrease in the local pressure down to values close to vapour pressure. This discontinuity describes the onset of cavitation, which is treated in a self-consistent manner as an isothermal homogeneous two-phase regime. Two flow problems are identified in such a configuration: (i) the film flow subject to cavitation in the thin lubrication gap, and (ii) the percolation of lubricant through the porous matrix, the latter governed by well-known Darcy's law. The pressures on both sides of the interface separating the sinter flow from the lubricant film are regarded as equal, provided that the typical scales involved by the complex internal geometry of the matrix are much smaller than the gap height. Then only the film flow is prone to cavitation. Concerning (i), the Reynolds equation applies, here adapted in such a way as to comprise the nonlinearities introduced by the presence of cavitation. Solely adding the requirement of zero net flux across the phase interface to the combination of (i) with (ii) results in a well-posed formulation of the coupled problem. As a preeminent finding, however, the density is continuous at film rupture but inevitably undergoes a jump at recondensation. The most notable non-dimensional groups involved are the eccentricity ratio {$\epsilon$} and a similarity parameter measuring the permeability of the sinter. In a combined numerical/analytical study emphasis is placed on the existence of solutions for {$\epsilon$} even close to unity.},
    note = {talk: British Applied Mathematics Colloquium ({BAMC}) 2012, University College London, {UK;} 2012-03-27 -- 2012-03-29}
}



Created from the Publication Database of the Vienna University of Technology.