👉 The Preston fluid, also known as the Preston gas or Preston liquid, is a theoretical model proposed by physicist John Preston to explain the anomalous properties of certain fluids, particularly at low temperatures and high pressures. Unlike classical fluids, Preston fluid exhibits unusual behaviors such as a significant increase in compressibility and the ability to support surface tension effects over macroscopic scales. This fluid is often conceptualized as a mixture of a gas and a liquid phase, with the gas component contributing to its low compressibility and high viscosity, while the liquid phase provides the necessary surface tension. The model helps bridge gaps in understanding the behavior of real fluids under extreme conditions, offering insights into phenomena like supercritical fluids and the unique properties observed in materials like liquid helium near its critical point.
