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We report pore-scale statistical properties of temperature and thermal energy dissipation rate in a two-dimensional porous Rayleigh-B\'enard (RB) cell. High-resolution direct numerical simulations were carried out for the fixed Rayleigh…

Fluid Dynamics · Physics 2023-09-20 Ao Xu , Ben-Rui Xu , Heng-Dong Xi

We present a study of phase separation from supersaturated 3He-4He liquid mixtures at low temperatures addressing both the degree of critical supersaturation Dx and the thermal-to-quantum crossover temperature T* for the nucleation process.…

Condensed Matter · Physics 2007-05-23 M. Barranco , M. Guilleumas , D. M. Jezek , R. J. Lombard , J. Navarro , M. Pi

As the demand for lithium-ion batteries rapidly increases there is a need to design these cells in a safe manner to mitigate thermal runaway. Thermal runaway in batteries leads to an uncontrollable temperature rise and potentially fires,…

Computational Engineering, Finance, and Science · Computer Science 2024-12-02 Saakaar Bhatnagar , Andrew Comerford , Zelu Xu , Davide Berti Polato , Araz Banaeizadeh , Alessandro Ferraris

The production of $\pi^0$, $\eta$, and $\phi$ in the most central (0%-5%) Xe+Xe collisions at $\sqrt{s_{NN}}$ = 5.44 TeV is investigated in the framework of the perturbative QCD (pQCD) improved parton model at an accuracy of next-to-leading…

High Energy Physics - Phenomenology · Physics 2023-03-22 Qing Zhang , Wei Dai , Lei Wang , Ben-Wei Zhang , Enke Wang

Orbits six through nine of the Parker Solar Probe have been studied to show that solar wind core electrons emerged from 15 solar radii with temperatures that were constant to within ~10% although the solar wind speed varied from 300 to 800…

Solar and Stellar Astrophysics · Physics 2022-05-04 F. S. Mozer , S. D. Bale , C. A. Cattell , J. Halekas , I. Y. Vasko , J. L. Verniero , P. J. Kellogg

Identification of novel materials with enhanced thermoelectric (TE) performance is critical for advancing TE research. In this direction, this is the first report on TE properties of low-cost, nontoxic, and abundant core-shell Cu@Cu2O…

Mesoscale and Nanoscale Physics · Physics 2020-12-02 Vikash Sharma , Gunadhor Singh Okram , Divya Verma , Niranjan Prasad Lalla , Yung-Kang Kuo

We present a spherically symmetric, core-collapse model of SNR RX J1713.7-3946 that includes a hydrodynamic simulation of the remnant evolution coupled to the efficient production of cosmic rays (CRs) by nonlinear diffusive shock…

High Energy Astrophysical Phenomena · Physics 2015-05-30 Donald C. Ellison , Patrick Slane , Daniel J. Patnaude , Andrei M. Bykov

Compressional Alfv\'en eigenmodes (CAE) driven by energetic ions have been observed in magnetic fusion experiments. In this paper, we show that the modes can also be driven by runaway electrons formed in post-disruption plasma, which may…

The rising part of a tidal disruption event light curve provides unique insight into early emission and the onset of accretion. Various mechanisms are proposed to explain the pre-peak emission, including shocks from debris interaction and…

High Energy Astrophysical Phenomena · Physics 2024-04-30 Xiaoshan Huang , Shane W. Davis , Yan-fei Jiang

For inner magnetospheric models of hard X-ray and gamma-ray emission in high-field pulsars and magnetars, resonant Compton upscattering is anticipated to be the most efficient process for generating continuum radiation. This is due in part…

High Energy Astrophysical Phenomena · Physics 2015-05-27 Matthew G. Baring , Zorawar Wadiasingh , Peter L. Gonthier

We investigate the thermal quenching of the multimodal photoluminescence from InAs/InP (001) self-assembled quantum dots. The temperature evolution of the photoluminescence spectra of two samples is followed from 10 K to 300 K. We develop a…

Mesoscale and Nanoscale Physics · Physics 2015-05-14 Guillaume Gélinas , Ali Lanacer , Richard Leonelli , Remo A. Masut , Sylvain Raymond , Philip J. Poole

Emerging dimming occurs in isolated solar active regions (ARs) during the early stages of magnetic flux emergence. Observed by the Atmospheric Imaging Assembly, it features a rapid decrease in extreme-ultraviolet (EUV) emission in the 171…

Solar and Stellar Astrophysics · Physics 2021-05-05 Anna V. Payne , Xudong Sun

We study numerically particle acceleration by the electric field induced near the horizon of a rotating supermassive (M \sim 10^9-10^{10} M_{\odot}) black hole embedded in the magnetic field B. We find that acceleration of protons to energy…

Astrophysics · Physics 2014-10-13 A. Neronov , P. Tinyakov , I. Tkachev

Sudden jets of collimated plasma arise from many locations on the Sun, including active regions. The magnetic field along which a jet emerges is often open to interplanetary space, offering a clear "escape route" for any flare-accelerated…

Solar and Stellar Astrophysics · Physics 2018-11-07 Lindsay Glesener , Gregory D. Fleishman

Quasi-periodic eruptions (QPEs) are recurring soft X-ray transients emerging from the vicinity of supermassive black holes (SMBHs) in nearby, low-mass galaxy nuclei; about ten QPE hosts have been identified thus far. Here we report the…

A hard TeV $\gamma$-ray component excess over the single-zone leptonic model prediction (TeV excess) is observed in the spectral energy distributions (SEDs) of some BL Lacs. Its origin is uncertain. We revisit this issue with four BL Lacs…

High Energy Astrophysical Phenomena · Physics 2022-02-09 Ji-Gui Cheng , Xiao-Li Huang , Ze-Rui Wang , Jian-Kun Huang , En-Wei Liang

Low threshold cryogenic calorimeters are a key technology for the advancement of rare-event searches. However, since a few years their sensitivity reach is challenged by the presence of a rising spectrum at low energies named low-energy…

Instrumentation and Detectors · Physics 2026-05-29 Vanessa Zema , Pasquale Pavone

Solar flares are accompanied by an enhanced emission of electromagnetic waves from the radio up to the gamma-ray range. The associated hard X-ray (HXR) and microwave radiation is generated by energetic electrons, which carry a substantial…

Solar and Stellar Astrophysics · Physics 2024-04-19 G. Mann , A. M. Veronig , F. Schuller

The magnetic and transport properties of Fe-deficient Fe5GeTe2 single crystals (Fe5-xGeTe2 with x~0.3) were studied and the impact of thermal processing was explored. Quenching crystals from the growth temperature has been previously shown…

Materials Science · Physics 2020-04-02 Andrew F. May , Craig A. Bridges , Michael A. McGuire

A recently introduced numerical model to calculate relaxation rates and relaxation time of superconductors is revisited. Relaxation time is needed to reorganise, after a disturbance, the electron system of the superconductor to new dynamic…

Superconductivity · Physics 2023-10-06 Harald Reiss
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