– We propose a model with a quantized degree of freedom to study the heat transport in quasi-one dimensional system. Our simulations reveal three distinct temperature regimes. In particular, the intermediate regime is characterized by heat conductivity with a temperature exponent γ much greater than 1/2 that was generally found in systems with point-like particles. A dynamical investigation ind...

This paper is concerned with the study of low-cost, low-power thermoacoustic electricity generators. Based on target electrical output power values of 50 and 100 W, three standing wave prototypes (of both one-stage and two-stage prototypes) integrating a commercial loudspeaker with different coupling arrangements are conceived. Each stage consists of a square-pore stack sandwiched between hot a...

Plasmonic nanostructures can significantly advance broadband visible-light absorption, with absorber thicknesses in the sub-wavelength regime, much thinner than conventional broadband coatings. Such absorbers have inherently very small heat capacity, hence a very rapid response time, and high light power-to-temperature sensitivity. Additionally, their surface emissivity can be spectrally tuned ...

Stably stratified canopy flow in complex terrain has been considered a difficult condition for measuring net ecosystem–atmosphere exchanges of carbon, water vapor, and energy. A long-standing advection error in eddy-flux measurements is caused by stably stratified canopy flow. Such a condition with strong thermal gradient and less turbulent air is also difficult for modeling. To understand the ...

In the past two decades, extensive research has been conducted towards developing nanomaterials with superior transport properties, such as heat conductivity and mass diffusivity, for applications in various industries including, but not limited to, energy storage and microelectronics. In terms of modeling and simulation, a long-standing difficulty lies in the separation of temporal and spatial...

[1] Explosive volcanic eruption columns are generally subdivided into a gas-thrust region and a convection-dominated plume. Where vents have greater than atmospheric pressure, the gas-thrust region is overpressured and develops a jet-like structure of standing shock waves. Using a pseudogas approximation for a mixture of tephra and gas, we numerically simulate the effects of shock waves on the ...

Normal mode decomposition of atomic vibrations has been used to provide microscopic under-standing thermal transport in amorphous solids for decades. In normal methods, it is naturally assumed that atoms vibrate around their equilibrium positions and individual modes are the fundamental vibrational excitations transporting heat. With abundance predictions from methods experimental measurements ...

The Standing Wave (SW) TESLA niobium-based superconducting radio frequency structure is limited to an accelerating gradient of about 50 MV/m by the critical RF magnetic field. To break through this barrier, we explore option traveling wave (TW) structures. Optimization TW structures was done considering experimentally known limiting electric and fields. It shown that a can have above 70 MeV/m 1...

physical exercise would improve postural stability, which is an essential factor in preventing accidental fall among the elderly population. the aim of this study is to examine the effectiveness of treadmill walking on balance improvement among the elderly people. a total of 30 community dwelling older adults with a berg balance scale score of 36-48 and the ability to walk without aid were cons...