Article
Thermodynamics
Annika Ott, Svend-Age Biehs
Summary: This study investigates the near-field thermal radiation of topologically protected edge modes in a honeycomb lattice of plasmonic InSb nanoparticles. The results show that the heat transport in the topologically non-trivial phase is dominated by the heat flux channel provided by the edge modes, rather than the bulk modes. This heat flux channel allows for enhanced heat transport along the edges of the honeycomb lattice.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Physics, Multidisciplinary
Claudio Maggi, Nicoletta Gnan, Matteo Paoluzzi, Emanuela Zaccarelli, Andrea Crisanti
Summary: This paper studies an active particles system near the motility-induced critical point and demonstrates that a nonequilibrium coloured noise field can capture the coarse-grained behavior of the system. The study shows that active particles violate the equilibrium fluctuation-dissipation in the high-wave-vector and high-frequency regime, but the critical dynamics is effectively in equilibrium at larger spatiotemporal scales. A field-theoretical description using a space-time correlated noise field qualitatively captures the numerical results.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Multidisciplinary
Karthik Sasihithlu
Summary: This study investigates the near-field heat transfer between molecules by deriving coupling parameters using coupled Drude oscillators and verifying predictions with standard fluctuational electrodynamics principles. The study also explores the influence of the orientation factor of dipole moments, traditionally considered for resonance energy transfer analysis, on near-field heat transfer.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
Lokrshi Prawar Dadhichi, Klaus Kroy
Summary: Graham has shown that a fluctuation-dissipation relation can be imposed on nonequilibrium Markovian Langevin equations with a stationary Fokker-Planck solution. The equilibrium form of the Langevin equation is associated with a nonequilibrium Hamiltonian. This study provides insight into the loss of time-reversal invariance in the Hamiltonian and the loss of time-reversal symmetries in reactive and dissipative fluxes.
Article
Materials Science, Multidisciplinary
Andras Grabarits, Marton Kormos, Izabella Lovas, Gergely Zarand
Summary: In this study, we investigated the typical distribution of quantum work at finite temperature. We found that for small work, the distribution follows a Gaussian distribution and the variance is proportional to the average work. However, at low temperature or for large work, a non-Gaussian distribution with superdiffusive work fluctuations is observed. Additionally, the time dependence of the probability of adiabaticity transitions from an exponential to a stretched exponential behavior. For large average work, the distribution becomes universal, dependent only on temperature and mean work. Our findings suggest that work statistics can be described by a Markovian energy-space diffusion process, starting from a thermal initial state. The validity of our results can be verified through measurements on nanoscale circuits or single qubit interferometry.
Article
Physics, Fluids & Plasmas
Manhyung Han, Jeonghyeok Park, Taewoong Lee, Jung Hoon Han
Summary: The segment discusses the description of the dynamics of systems subject to both dissipative and stochastic forces through the fluctuation-dissipation theorem (FDT), as well as the application and validation of FDT in the linear learning dynamics.
Article
Physics, Multidisciplinary
Eddy Collin, Ilya Golokolenov, Olivier Maillet, Laurent Saminadayar, Olivier Bourgeois
Summary: This study reports on the theoretical derivation of macroscopic thermal properties of an electrically insulating rod connected to two reservoirs. The theory predicts the temperature gradient and energy transport by linking motion amplitude cross-correlations between nearby mechanical modes. The theory relates the macroscopic clamping region where mixing occurs to the microscopic phonon mean-free-path.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Fluids & Plasmas
Lee Jinwoo
Summary: When a system is in equilibrium, external perturbations result in nonequilibrium distributions. Recent experiments have shown that these nonequilibrium data can contain critical information. Jinwoo and Tanaka mathematically prove that the nonequilibrium free energy profile of a process is connected to Jarzynski's work, which dissipates while molecules perform their tasks. We verify this fact numerically and provide an example of RNA translocation analysis using a computer simulation, confirming the efficiency of the process.
Article
Chemistry, Physical
Hossein Falinejad, Maryam Akhgar
Summary: This paper develops the formalism describing the spontaneous emission rate of an excited molecule near a perfect conductive wall and calculates the emission rate for different dipole moment orientations, finding consistent results. The agreement with previous studies is shown, and the variations of the spontaneous emission rate for different dipole moment orientations are demonstrated.
Article
Physics, Fluids & Plasmas
Dong Jae Chun, Younghoon Oh, Bong June Sung
Summary: The dynamic heterogeneity and translation-rotation decoupling in glasses and supercooled liquids are closely related to the local structure development, with significant differences observed between 2D polydisperse colloids and 2D binary colloids. Tracers in 2D polydisperse colloids exhibit a shape-dependency parameter of the decoupling that grows with the dynamic correlation length, while tracers in 2D binary colloids do not show a similar correlation, highlighting the relationship between dynamic heterogeneity, translation-rotation decoupling, and local structure development in glasses.
Article
Physics, Fluids & Plasmas
Rogelma M. S. Ferreira
Summary: Scaling methods play an important role in studying diffusion processes in physics. By introducing a time scale factor lambda(t), an analytical expression for the diffusion coefficient can be obtained, which allows us to describe the diffusion process. The results of this study demonstrate that this method is applicable to various types of stochastic problems and produces good results.
Article
Chemistry, Physical
Alireza Shakerpoor, Elijah Flenner, Grzegorz Szamel
Summary: Researchers derived a distribution function for the position of a tagged active particle in a system of interacting active particles, revealing a new effective temperature that is determined by the ratio of self-diffusion and tagged particle mobility coefficients.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Cheng Guo, Bo Zhao, Shanhui Fan
Summary: This study investigates the relationship between angular spectral absorptivity and emissivity for thermal emitters with various properties. By establishing an adjoint Kirchhoff's law and considering the symmetries of the system characterized by Shubnikov point groups, the relations between absorptivity and emissivity are derived. The theory is numerically verified for different types of point groups and structures.
Article
Chemistry, Multidisciplinary
Junghyun Park, Donghyun Kim, Hyunsik Kim, Junghoon Lee, Wonsub Chung
Summary: In this study, the heat dissipation of a copper heat sink was enhanced by surface modifications to increase its thermal emissivity, allowing an LED module to operate at a lower temperature. The nanoporous oxide layer formed through heat treatment acted as a thermal barrier for heat transfer, and optimization between oxide thickness and thermal emissivity is necessary for efficient heat dissipation. An oxide layer with an emissivity of 0.857 and slightly lower thermal diffusivity than copper showed the best performance in lowering the LED operating temperature.
Article
Materials Science, Multidisciplinary
Yanwei Zhao, Dan Pang, Meijie Chen, Zhuo Chen, Hongjie Yan
Summary: Passive daytime radiative cooling(PDRC) is an electricity-free cooling technology with environmental benefits, and a new scalable aqueous-based processing method utilizing hollow dielectric microspheres can create dielectric PDRC coatings with broadband emittance spectra for outdoor devices heat dissipation. This method does not require harmful organic solvents, and the resulting coatings have great stability, water repellence, and excellent flexibility.
APPLIED MATERIALS TODAY
(2022)
Article
Thermodynamics
Mehrdad Karimzadehkhouei, Abdolali Khalili Sadaghiani, Ahmad Reza Motezakker, Sarp Akgonul, Arzu Ozbey, Kuersat Sendur, M. Pinar Menguc, Ali Kosar
HEAT TRANSFER ENGINEERING
(2019)
Article
Optics
Cem Dogan Sahin, M. Pinar Menguc
Article
Thermodynamics
Cem Keskin, M. Pinar Menguc
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2020)
Article
Optics
Dilan Avsar, Hakan Erturk, M. Pinar Menguc
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2020)
Article
Optics
Muhammed Ali Kecebas, M. Pinar Menguc, Ali Kosar, Kursat Sendur
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2020)
Article
Physics, Multidisciplinary
Raaid Rashad Jassem Al Doury, Saadet Ozkan, M. Pinar Menguc
Article
Thermodynamics
Roxana Family, Serdar Celik, M. Pinar Menguc
HEAT AND MASS TRANSFER
(2020)
Article
Optics
Ersin Yildiz, Altug Melik Basol, M. Pinar Menguc
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2020)
Editorial Material
Optics
Denis Lemonnier, Brent W. Webb, M. Pinar Menguc
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2021)
Article
Energy & Fuels
Niloufar Pirouzfam, M. Pinar Menguc, Kursat Sendur
Summary: Passive radiative cooling is an important concept for building and industrial energy efficiency. The development of color-coordinated paints and coatings is necessary to attract more users. The proposed colored radiative cooling devices have acceptable cooling power and the ability to control color, making them suitable for various applications.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Green & Sustainable Science & Technology
Tufan Akba, Derek Baker, M. Pinar Menguc
Summary: This study optimizes the design of a micro-scale pressurized volumetric receiver by changing geometry and flow rate, while considering volume, outlet air temperature, and outer surface temperature constraints. The model is replicated and restructured using OpenMDAO framework with efficient derivative calculation. Verification and analysis of optimization performance, selection of optimizers, domain size impact, and radiative methods are discussed. A solution methodology is suggested for future design optimizations of macro-scale pressurized volumetric receivers.
Article
Nanoscience & Nanotechnology
Moein Talebian Gevari, Soroush Niazi, Mehrdad Karimzadehkhouei, Kursat Sendur, M. Pinar Menguc, Morteza Ghorbani, Ali Kosar
Review
Thermodynamics
Layth Al-Gebory, M. Pinar Menguc
JOURNAL OF ENHANCED HEAT TRANSFER
(2020)
Article
Thermodynamics
Serdar Celik, M. Pinar Menguc
HEAT TRANSFER RESEARCH
(2020)
Correction
Multidisciplinary Sciences
Azadeh Didari, M. Pinar Menguc
SCIENTIFIC REPORTS
(2019)
Article
Optics
Jianbao Zhao, Brant E. Billinghurst, Paul L. Raston
Summary: The far-infrared spectrum of room temperature formic acid labeled with 13C has been recorded and analyzed, leading to the determination of accurate line positions and predictions relevant to Earth's atmosphere and interstellar sources.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Semen Vasilchenko, Alexander Solodov, Oleg Egorov, Vladimir Tyuterev
Summary: Ozone plays a crucial role in atmospheric chemistry and radiative processes, and it may serve as a potential biosignature species in exoplanetary observations. This study utilized a continuous-wave cavity-ring-down spectrometer to accurately measure the absorption cross-sections of ozone in the near-infrared range. The results provide more precise data and have potential applications in atmospheric research.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Baorui Huang, Bo Peng, Qifeng Ren, Sheng Liao
Summary: This study utilizes the polarization bidirectional reflectance distribution function (p-BRDF) model derived from the microfacet theory to analyze the spectral p-BRDF of a brass surface. The results show that factors such as polarization state, wavelength, surface roughness, and permittivity have a significant impact on the distribution of BRDF on the object surface.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Qingwei Duan, Jiajie Wang, Qiwei Li, Xiang'e Han, Kuan Fang Ren
Summary: This paper introduces the applications of the generalized Lorenz-Mie theory (GLMT) and the vectorial complex ray model (VCRM) in the interaction between beams and particles. By comparing the experimental results, it is found that VCRM performs well in Gaussian beam scattering problems, providing a new method for studying the scattering of shaped beams by large particles/objects of any shape.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Yuefan Du, Xiaoping Li, Lei Shi, Fangyan Li, Shurong Yuan
Summary: This study proposes a physics-constrained model that utilizes the distribution characteristics of gas spectral parameters to predict spectral parameters for unknown wavelengths. Experimental results show that the model improves prediction accuracy and increases the data volume of gas spectral parameters by 4-5 times.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Laurentius Windholz, Imran Siddiqui, Shamim Khan, Syed Tanweer Iqbal
Summary: In this study, we report the discovery of two energy levels of the Pr atom that exhibit strong J-mixing, as well as the observed hyperfine structure patterns. The composition of wave functions, in addition to J-values, plays a crucial role in determining the appearance of these patterns.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Matthias Germann, Adrian Hjalten, Jonathan Tennyson, Sergei N. Yurchenko, Iouli E. Gordon, Christian Pett, Isak Silander, Karol Krzempek, Arkadiusz Hudzikowski, Aleksander Gluszek, Grzegorz Sobon, Aleksandra Foltynowicz
Summary: In this study, optical frequency comb Fourier transform spectroscopy was used to record the spectroscopic data of formaldehyde in a specific frequency range. The line positions and intensities of rovibrational transitions were obtained through line-by-line fitting. By incorporating these accurate line positions into the analysis, more energy levels and rovibrational transitions were predicted with reduced uncertainties in the H2CO spectrum.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Leonardo A. Ambrosio, Jhonas O. de Sarro, Gerard Gouesbet
Summary: This study derives a polychromatic version of the generalized Lorenz-Mie theory stricto sensu (GLMT) by expanding arbitrary time-dependent fields into partial waves using Bromwich scalar potentials. The new formalism introduces field shape spectra (FSSs) which are intrinsically frequency-dependent, modifying and redefining the physical quantities expressed in the monochromatic GLMT.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Patrick C. Chaumet
Summary: The paper proposes two new methods (IDR(s) and GPBiCGstab(L)) for computing the electromagnetic diffraction of objects larger than the wavelength. It is found that IDR(s) can reduce computation time but may not converge in some cases, while GPBiCGstab(L) always converges and also reduces computation time compared to QMR, GPBiCG, and BiCGstab.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Antigoni Kleanthous, Anthony J. Baran, Timo Betcke, David P. Hewett, Christopher D. Westbrook
Summary: To improve weather and climate models, it is important to accurately calculate the single-scattering properties of randomly oriented complex atmospheric ice crystals. This study applies Boundary Element Method (BEM) to calculate these properties in the microwave and sub-millimeter region of the electromagnetic spectrum for all-sky data assimilation. The results show that BEM can accurately compute the scattering properties of complex ice aggregates, which is crucial for weather and climate models.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Ben Niu, Yanting Li, Gang Xiong, Jihui Chen, Zhimin Hu, Yunqing Fu, Yaming Zou, Chongyang Chen, Ke Yao
Summary: This study presents both experimental and theoretical analysis of the 4d 2D5/2 -> 2D3/2 magnetic dipole transition in Rb-like ions. The correlation between the theoretical and experimental findings is observed, and it is illustrated that the contribution of the core-valence correlation is pivotal for the fine structure splittings.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
James A. Lock, Gunther P. Konnen, Philip Laven
Summary: Researchers have derived an analytical generalization of Airy theory that provides a more accurate approximation for the primary rainbow, but still has limitations for the second-order rainbow and beyond.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Shixiong Wu, Xuebang Gao, Xuqiang Dou, Li Xie
Summary: In this paper, an indoor experimental study was conducted to investigate the optical attenuation caused by sand/dust storms at different relative humidity levels. It was found that the hygroscopic growth of sand/dust particles has a significant effect on optical attenuation when the relative humidity is above 60%. Based on the double-parameter Kasten model, a proposed optical attenuation model takes into account visibility, particle size, relative humidity, and optical wavelength. Numerical calculations considering the hygroscopicity effect were also performed, and the results were in agreement with the experimental data.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Zhimin Yang, Jaeman Song, Bong Jae Lee
Summary: In this study, we analyze TPX cells operating in the self-sustaining circuit and examine the effects of different bandgaps on their performance. The results show that the bandgap energy of the LED must exceed that of the PV cell for the TPX cell to function in a self-sustaining parallel circuit. Additionally, a narrower bandgap energy for the PV cell and a wider bandgap energy for the LED can improve the performance of the TPX cell in the self-sustaining circuit.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)