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First-principles prediction of thermal conductivity and radiative properties is crucial. However, computing phonon scattering, especially for four-phonon scattering, could be prohibitively expensive, and the thermal conductivity even for…

Materials Science · Physics 2023-11-23 Ziqi Guo , Zherui Han , Dudong Feng , Guang Lin , Xiulin Ruan

The climate impact of building envelopes is often quantified using their energy savings and CO2 emission reduction benefits. However, building envelopes also trap solar and thermal infrared heat, which is dissipated as a direct heating…

Applied Physics · Physics 2025-09-25 Nithin Jo Varghese , Jyothis Anand , Jyotirmoy Mandal

We describe a general radiative equilibrium and temperature correction procedure for use in Monte Carlo radiation transfer codes with sources of temperature-independent opacity, such as astrophysical dust. The technique utilizes the fact…

Astrophysics · Physics 2010-04-08 J. E. Bjorkman , Kenneth Wood

We predict an additional thermal transport pathway across metal/non-metal interfaces with large electron-phonon non-equilibrium via evanescent radiative heat transfer. In such systems, electron scattering processes vary drastically and can…

Mesoscale and Nanoscale Physics · Physics 2025-04-21 William D. Hutchins , Saman Zare , Mehran Habibzadeh , Sheila Edalatpour , Patrick E. Hopkins

In this paper, we explore the far-field radiative thermal rectification potential of common materials such as metals, dielectrics and doped semi-conductors using radiative and thermo-radiative properties extracted from literature. Ten…

Applied Physics · Physics 2021-03-17 Sreyash Sarkar , Elyes Nefzaoui , Philippe Basset , Tarik Bourouina

We report a detailed formalism aimed at the thermal modeling and heat mitigation in high-power double-clad fiber amplifiers. Closed form analytical formulas are developed that take into account the spatial profile of the amplified signal…

Applied Physics · Physics 2018-09-28 Esmaeil Mobini , Mostafa Peysokhan , Behnam Abaie , Arash Mafi

Accurate temperature measurements are essential for the proper monitoring and control of industrial furnaces. However, measurement uncertainty is a risk for such a critical parameter. Certain instrumental and environmental errors must be…

Signal Processing · Electrical Eng. & Systems 2022-01-12 Iñigo Martinez , Urtzi Otamendi , Igor G. Olaizola , Roger Solsona , Mikel Maiza , Elisabeth Viles , Arturo Fernandez , Ignacio Arzua

A photoionized gas under constant pressure can display a thermal instability, with three or more solutions for possible thermal equilibrium. A unique solution of the structure of the irradiated medium is obtained only if electron conduction…

Instrumentation and Methods for Astrophysics · Physics 2015-05-13 B. Czerny , L. Chevallier , A. C. Goncalves , A. Rozanska , A. -M. Dumont

The performance of a radiatively cooled instrument is investigated in the context of optomechanical quantum experiments, where the environment of a macroscopic particle in a quantum-superposition has to be cooled to less than 20\,K in deep…

We simulate convection near the solar surface, where the continuum optical depth is of order unity. Hence, to determine the radiative heating and cooling in the energy conservation equation, we must solve the radiative transfer equation…

Astrophysics · Physics 2007-05-23 Robert Stein , Aake Nordlund

We propose an adaptive phase technique for the parametric cooling of mechanical resonances. This involves the detection of the mechanical quadratures, followed by a sequence of periodic controllable adjustments of the phase of a parametric…

Quantum Physics · Physics 2023-06-14 Alekhya Ghosh , Pardeep Kumar , Fidel Jimenez , Vivishek Sudhir , Claudiu Genes

Real-world passive radiative cooling requires highly emissive, selective, and omnidirectional thermal emitters to maintain the radiative cooler at a certain temperature below the ambient temperature while maximizing the net cooling power.…

Applied Physics · Physics 2023-06-12 Yinan Zhang , Yinggang Chen , Tong Wang , Qian Zhu , Min Gu

By means of fluctuationnal electrodynamics, we calculate radiative heat flux between two pla-nar materials respectively made of SiC and SiO2. More specifically, we focus on a first (direct) situation where one of the two materials (for…

Mesoscale and Nanoscale Physics · Physics 2015-10-28 Karl Joulain , Younes Ezzahri , Jérémie Drevillon , Benoit Rousseau , Domingos De Sousa Meneses

Atmospheric temperatures are to be estimated from thermal emission spectra of Earth-like exoplanets orbiting M-stars as observed by current and future planned missions. To this end, a line-by-line radiative transfer code is used to generate…

Earth and Planetary Astrophysics · Physics 2023-06-02 Franz Schreier , J. Lee Grenfell , Fabian Wunderlich , Thomas Trautmann

We analyze cavity-assisted cooling schemes for polar molecules in the microwave domain, where molecules are excited on a rotational transition and energy is dissipated via strong interactions with a lossy stripline cavity, as recently…

Quantum Physics · Physics 2009-12-21 Margareta Wallquist , Peter Rabl , Mikhail D. Lukin , Peter Zoller

There are a lot of oscillatory motions of various kinds in the atmosphere, for example, internal gravity waves (IGW), which have a period less than the time of flight of the radiosonde. Oscillatory motions lead to adiabatic cooling during…

Atmospheric and Oceanic Physics · Physics 2022-08-31 Aloexander V. Kochin

The thermal model of particle production is used to analyze the particle ratios and the p_T spectra measured recently at RHIC. Our fit of the particle ratios yields the temperature at the chemical freeze-out T_chem = 165 +- 7 MeV with the…

Nuclear Theory · Physics 2011-07-19 Wojciech Florkowski , Wojciech Broniowski , Mariusz Michalec

In this paper we summarize several applications based on thermal imaging. We emphasize the importance of emissivity adjustment for a proper temperature measurement. A new set of face images acquired at different emissivity values with steps…

Computer Vision and Pattern Recognition · Computer Science 2022-03-31 Marcos Faundez-Zanuy , Xavier Font Aragones , Jiri Mekyska

This work presents time-dependent numerical calculations of heat generation and dissipation in targets used in high ion-beam current nuclear astrophysics experiments. The simulation is beneficial for choosing the thickness of targets,…

Instrumentation and Detectors · Physics 2020-02-25 Tanmoy Bar , Chinmay Basu , Mithun Das , Apurba Kumar Santra , Swarnendu Sen

Sampling from a Boltzmann distribution is NP-hard and so requires heuristic approaches. Quantum annealing is one promising candidate. The failure of annealing dynamics to equilibrate on practical time scales is a well understood limitation,…

Quantum Physics · Physics 2017-08-28 Jack Raymond , Sheir Yarkoni , Evgeny Andriyash