Negative differential thermal resistance of fluids induced by heat baths

It has recently been shown that in one-dimensional hard-point gases, there is a mechanism that induces negative differential thermal resistance (NDTR) between heat baths. We examine this mechanism in more general higher-dimensional fluids described by multiparticle collision dynamics. We consider fluids in a finite cuboid region of three-dimensional space with each end in contact with a heat bath. Based on analytical results and numerical models, we find that the mechanism underlying NDTR also works for high-dimensional fluidic systems with weak interactions and is very robust to mixed fluids. Our results significantly advance knowledge of NDTR induced by heat baths and illuminate different directions to explore in fabricating fluid thermal transistors in micro-and nanosystems.

Automated summary

A mechanism that induces negative differential thermal resistance (NDTR) between heat baths has been shown in one-dimensional hard-point gases. In this study, we extend the investigation to higher-dimensional fluids using multiparticle collision dynamics, and find that the NDTR mechanism is applicable to high-dimensional fluidic systems with weak interactions and is robust to mixed fluids. These findings significantly advance the understanding of NDTR induced by heat baths and shed light on the fabrication of fluid thermal transistors in micro-and nanosystems.