Molecular dynamics study on the viscosity of hydraulic oil in the deep- sea environment

MJ Shen and F Zhang and YS Liu and XP Zhou, JOURNAL OF MOLECULAR LIQUIDS, 411, 125716 (2024).

DOI: 10.1016/j.molliq.2024.125716

As the primary working medium of deep-sea hydraulic systems, the viscosity of 10# aviation hydraulic oil directly influences the performance of such systems and is significantly affected by the deep- sea environment with low temperature and high pressure. However, conducting experiments in such conditions poses challenges. This study utilizes the non-equilibrium molecular dynamics (NEMD) and the Carreau model to calculate the viscosity of 10# aviation hydraulic oil. The viscosity of 10# aviation hydraulic oil in the deep-sea environment increases exponentially with pressure, reaching up to 287.66 mPa & sdot;s at the deep-sea pressure of 110 MPa, which is approximately 15 times as large as that at the normal pressure. A detailed analysis of the self-diffusion coefficient is provided to better understand the influence of temperature and pressure on the viscosity of 10# aviation hydraulic oil in the deep-sea environment.

Return to Publications page