Effect of undissolved gas on fluid bulk modulus

Abstract

This document describes the effect of undissolved gas on the bulk modulus of the fluid. The concept of liquid compressibility and dependence on composition, temperature and pressure is considered. Various methods of measuring the modulus of volumetric elasticity of the liquid were considered. It was also proposed to improve the mathematical model for calculating the module of volumetric elasticity of a liquid. The results of the study were used to plot the effect of the gas phase content modulus of volumetric elasticity of working fluid at different pressures. It was also concluded that the obtained values describe the need to equip hydraulic drives with devices for degassing working liquids.

Numerical Modeling and Analysis of the Pressure Pulse Generated by Drop Mass Calibration Device

“…To account for this realworld effect, the model adopted the experimentally determined effective bulk modulus rather than the theoretical absolute value. Undissolved gas bubbles can significantly alter a liquid's properties and how it responds to mechanical stresses [20].…”