Down to the roughness scale assessment of piston-ring/liner contacts

An extended Elrod-Adams model to account for backpressure and blow-by inception

“…A solution to Eq. ( 25) accomplishes automatically the conditions ( 20) and (22) for any (i, j) ∈ I. However, the only immediate condition accomplished by θ i,j is that θ i,j ≤ 1.…”

“…However, mass-conservation is a mandatory property of numerical schemes when considering, as is the current trend, the microscopic features of liner surfaces [14,15]. Recently, many studies on the PRL performance have adopted the mass-conserving Elrod-Adams model [16,17,18,19,20,21,22,23]. Unfortunately, that model assumes the boundary condition for pressure as being equal to the cavitation pressure, which is invalid for the PRL mechanism since the CCP can assume values in the order of 100 atm.…”

A stable numerical strategy for Reynolds-Rayleigh-Plesset coupling

“…Another example is the Elrod-Adams model, which here is considered in the mathematical form made precise by Bayada and coworkers [5] and which can be viewed, to some extent, as a limit of (1) for β → +∞. In recent years, detailed measurement and simulation of lubricated devices with wide ranges in their spatial and temporal scales has become affordable [6,7,8]. Micrometric features of the lubricated surfaces can now be incorporated into the simulated geometry, down to the roughness scale.…”

“…In recent years, detailed measurement and simulation of lubricated devices with wide ranges in their spatial and temporal scales has become affordable [6,7,8]. Micrometric features of the lubricated surfaces can now be incorporated into the simulated geometry, down to the roughness scale.…”