Predicting the cyclic oil film thickness variation in reciprocating hydrodynamic line contacts
Researchers have developed new mathematical equations to predict oil film thickness in reciprocating hydrodynamic contacts. This model accounts for 'squeeze' effects and explains why friction and film thickness are asymmetric in reciprocating machinery.
Why it matters
Improved tribological modeling allows for more accurate friction estimation, which is critical for the design and efficiency of industrial machinery and engines.
Calculated OFT versus angle. Operating conditions are given in the text. The simulation that includes “squeeze” effects is shown as the red full line, whereas the simulation that neglects such effects is shown as the black dotted line.
Comparison of simple equation for OFT variation with angle (Eq. (28)) shown as blue squares and red triangles, with full numerical simulations, using Python code (blue and red lines).
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