Normal heat diffusion in many-body system via thermal photons

Heat transfer mediated by the Berry-phase in non-reciprocal many-body systems

We investigate the adiabatic evolution of thermal state in non-reciprocal many-body systems coupled to their environment and subject to periodic drivings. In such systems we show that besides the dynamical phase a geometrical phase can exist and it drives the relaxation dynamic of the system. On the contrary to the dynamical phase which always pushes the system toward its equilibrium state we show that the geometric phase can speed up or reduce the speed of relaxation process. These results could have applications in the field of thermal management of complex systems.

Optimal Control of Time-Dependent Heat and Electromagnetic Energy Transfer in Selfdriven Coolers

The complex time-dependent heat and electromagnetic energy transfer in a new type of cooling system is analyzed. The system consists of a cold body, a Peltier element and an electric circuit containing an inductor with controllable inductance. This system allows cooling a body below the ambient temperature without using an external reservoir of mechanical work. The complex energy transfer in the new system is controllable. The minimum temperature reached by a cooled body depends on its mass. There is however a minimum minimorum temperature, for a specified mass of the cooled body. The minimum …

纳米颗粒网络中近场辐射传热的有利与不利多体相互作用

Favorable and unfavorable many-body interactions for near-field radiative heat transfer in nanoparticle networks

本文利用多体与连续介质扩散理论分析纳米颗粒网络近场辐射传热中的MBI，划分四类作用区，并通过结构与光学调控实现热导率从降低55%到放大30倍。

The gray body approximation for radiative heat transfer in evacuated tube solar collectors: Effects of envelope infrared transparency

A theoretical and experimental analysis is carried out of radiative heat transfer in the coaxial geometry of evacuated tube solar collectors. The gray body approximation implicit in the use of an effective emissivity does not strictly apply to evacuated tube solar collectors due to selective absorber coating and partially transmitting outer glass in the thermal infrared, especially when constructed from borosilicate. We develop analytic expressions for the heat transfer through the outer envelope and show the equations no longer follow a simple form where an effective emissivity for the system…

非球形偶极子近场辐射传热的广义多体方法

Generalized many-body approach for near-field radiative heat transfer between nonspherical dipoles

提出一种广义多体方法计算非球形偶极子间近场辐射传热，通过后验定义极化率，并验证了椭球颗粒系统的热导调控及各向异性辐射热导率。

Integrated Cooling (i-Cool) Textile of Heat Conduction and Sweat Transportation for Personal Perspiration Management

Perspiration evaporation plays an indispensable role in human body heat dissipation. However, conventional textiles show limited perspiration management capability in moderate/profuse perspiration scenarios, i.e. low evaporation ability, ineffective evaporative cooling effect, and resultant human body dehydration and electrolyte disorder. Here, we propose a novel concept of integrated cooling (i-Cool) textile of heat conduction and sweat transportation for personal perspiration management based on unique functional structure design. By integrating heat conductive pathways and water transport c…