熱媒液体の粘性を決定する分子動力学機構

抄録

It is of great importance to predict thermophysical properties of thermal medium liquids by comprehending the mechanism for momentum transfer at the molecular scale and elucidating microscopic building blocks of viscosity. It allows us to design molecules which have necessary thermophysical properties. Viscosity is one of significant properties which determine performance of heat exchangers. In this study we aim to understand how the liquid viscosity is determined by molecular interactions and investigate the influences on viscosity by molecular species, shear rate and temperature, by separating viscosity into detailed molecular scale mechanisms to transport momentum using NEMD (non-equilibrium molecular dynamics) simulations. Here we adopted argon, water and alkane species as tested liquids to understand the momentum transfer mechanisms in fundamental liquids.