Results 111 to 120 of about 9,183 (293)

Effects of rotation and surface forcing on deep stellar convection zones

Proceedings of the International Astronomical Union, 2023
AbstractThe canonical undestanding of stellar convection has recently been put under doubt due to helioseismic results and global 3D convection simulations. This “convective conundrum” is manifested by much higher velocity amplitudes in simulations at large scales in comparison to helioseismic results, and the difficulty in reproducing the solar ...
openaire   +2 more sources

Monolithic UV‐Laser Programming of Photothermally Meta‐Morphing SMA Structures: Dual‐Encoded Kirigami Mechanics and Photonic Absorbance

Advanced Science, EarlyView.
A monolithic manufacturing strategy is presented for photothermal shape memory alloy (SMA) meta‐morphing structures. Using a single‐step UV‐laser process, the mechanical compliance is programmed via kirigami patterning while optical absorbance is simultaneously tuned through surface oxidation.
Hyunsoo Kim, Manmatha Mahato, Hunpyo Ju, Ryanda Enggar Anugrah Ardhi, Ji‐Seok Kim, Ashhad Kamal Taseer, Myung‐Joon Lee, Hyunjoon Yoo, Il‐Kwon Oh   +8 more
wiley   +1 more source

Asteroseismic Analysis of RY Leporis: The Post-main Sequence HADS in a Binary System

The Astrophysical Journal
We present a comprehensive study of the pulsating primary component of the long-period binary system RY Lep. The spectral energy distribution and the absence of detectable lines indicate that the companion is likely a white dwarf.
Wojciech Niewiadomski, Jadwiga Daszyńska-Daszkiewicz, Przemysław Walczak, Wojciech Szewczuk, Eloy Rodríguez, Piotr Kołaczek-Szymański, Aliz Derekas   +6 more
doaj   +1 more source

Overtures to the pulsational instability of ZZ Ceti variables [PDF]

, 1995
Results of nonradial, nonadiabatic pulsation calculations on hydrogen-rich white dwarf models are presented. In contrast to earlier attempts, the modeling builds on hydrodynamically simulated convective surface layers supplemented with standard interior ...
Freytag, Bernd, Gautschy, Alfred, Ludwig, Hans-Günter   +2 more
core   +1 more source

A Theoretical Study of Acoustic Glitches in Low-Mass Main-Sequence Stars

, 2014
There are regions in stars, such as ionization zones and the interface between radiative and convective regions, that cause a localized sharp variation in the sound speed. These are known as "acoustic glitches".
Antia, H. M., Basu, Sarbani, Mazumdar, Anwesh, Verma, Kuldeep   +3 more
core   +1 more source

Numerical simulations of stellar convective dynamos III. At the base of the convection zone [PDF]

Geophysical & Astrophysical Fluid Dynamics, 1985
We describe numerical simulations of giant-cell solar convection and magnetic field generation. Nonlinear, three-dimensional, time-dependent solutions of the anelastic magnetohydrodynamic equations are presented for a stratified, rotating, spherical shell of ionized gas.
openaire   +1 more source

Multi‐scale Optimization on Interfacial Evaporative Cooling for Photovoltaic Performance Enhancement

Advanced Science, EarlyView.
This study presents a passive siphon‐driven interfacial evaporative cooling technology for photovoltaics. A multiscale multiphysics model is developed and validated experimentally. Results show that optimizing installation parameters reduces operating temperature by up to 22.3 °C and boosts power efficiency by 8.9%, offering a practical pathway for ...
Fuxiang Li, Haosheng Lin, Zengguang Sui, Yunren Sui, Zhixiong Ding, Wei Wu   +5 more
wiley   +1 more source

3D Hydrodynamic Simulations of Massive Main-sequence Stars. III. The Effect of Radiation Pressure and Diffusion Leading to a 1D Equilibrium Model

The Astrophysical Journal
We present 3D hydrodynamical simulations of core convection with a stably stratified envelope of a 25 M _⊙ star in the early phase of the main sequence.
Huaqing Mao, Paul Woodward, Falk Herwig, Pavel A. Denissenkov, Simon Blouin, William Thompson, Benjamin McDermott   +6 more
doaj   +1 more source

New Methods in Modeling of Hot Stellar Atmospheres

Open Astronomy, 2013
In the present study we had three main aims. First to study the possibility of reducing the initial model atmosphere data to short analytical polynomials.
Sapar A., Poolamäe R., Sapar L.
doaj   +1 more source

Self‐Heating and Thermal Gradient in Solid‐State Batteries: Friend or Foe?

Advanced Energy Materials, EarlyView.
This work investigates the role of self‐heating and thermal gradients derived from the kinetics/transport interactions within the cathode microstructure, electrode architecture, and operating regimes, thus encouraging a mechanism‐centric design of anode‐free solid‐state batteries for next‐generation high‐power applications.
Abhinand Ayyaswamy, Bairav S. Vishnugopi, Partha P. Mukherjee   +2 more
wiley   +1 more source