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July 11, 2026Journal of Tribology

A Coupled Transient Thermal Elastohydrodynamic Lubrication Model for Radial Piston Motors

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Authors

JLJinhwan LeeLSLizhi ShangPBPierre Bernard

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Overview

Randomized trial demonstrates improved thermal analysis in radial piston motors, indicating significant temperature effects on lubrication.

Key Points

  • To develop a transient thermal elastohydrodynamic lubrication model for radial piston motors and validate its accuracy.
  • Developed a mixed thermal elastohydrodynamic lubrication model for simulation.
  • Utilized periodic boundary condition and time domain segmentation for efficiency.
  • Validated the model with transient temperature measurements.
  • At 350 bar and 80 RPM, temperature increases were 22.8°C at the roller–bushing interface and 88.1°C at the piston–cylinder interface.
  • Notable decrease in viscosity affected piston lubricating interfaces.
  • Piston–cylinder interface exhibited 33% higher contact force and pressure compared to isothermal conditions.

Cite This Study

Lee et al. (2026) studied this question.

synapsesocial.com/papers/6a51deadc18d7f28ca50050ehttps://doi.org/10.1115/1.4072294
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Also Consider

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  1. 1A Numerical Investigation of Mixed Thermal Elastohydrodynamic Lubrication in Tilting-Pad Journal Bearing2024 · 11 citations
  2. 2An Average Reynolds Equation for Partial Film Lubrication With a Contact Factor1989 · 375 citations
  3. 3Thermal Elastohydrodynamic Lubrication of Rolling/Sliding Contacts1990 · 99 citations