Results 101 to 110 of about 9,183 (293)
3D Simulations of Semiconvection in Spheres: Turbulent Mixing and Layer Formation
The Astrophysical JournalSemiconvection occurs in regions of stars and planets that are unstable to overturning convection according to the Schwarzschild criterion, but stable according to the Ledoux criterion.
J. R. Fuentes
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Beyond Mixing-length Theory: a step toward 321D
, 2015 We examine the physical basis for algorithms to replace mixing-length theory (MLT) in stellar evolutionary computations. Our 321D procedure is based on numerical solutions of the Navier-Stokes equations.
Arnett, W. David +5 more
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Advanced Science, EarlyView.Graphene‐skinned alumina fiber (GAF) is a new composite with graphene conformally grown on individual alumina fibers via chemical vapor deposition (CVD). GAF's dynamic, continuous and scalable production is achieved by using a home‐made roll‐to‐roll (RTR) CVD system featuring integrated degumming and growth chambers. GAF possesses tunable conductivity,
Xiaobai Wang +13 more
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The Effects of Radially Varying Diffusivities on Stellar Convection Zone Dynamics
The Astrophysical JournalConvection is ubiquitous in stellar and planetary interiors, where it likely plays an integral role in the generation of magnetic fields. As the interiors of these objects remain hidden from direct observation, numerical models of convection are an ...
Brandon J. Lazard +2 more
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Structure and Evolution of Internally Heated Hot Jupiters
, 2017 Hot Jupiters receive strong stellar irradiation, producing equilibrium temperatures of $1000 - 2500 \ \mathrm{Kelvin}$. Incoming irradiation directly heats just their thin outer layer, down to pressures of $\sim 0.1 \ \mathrm{bars}$.
Komacek, Thaddeus D., Youdin, Andrew N.
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Advanced Science, EarlyView.A volcano‐inspired dual‐carbon aerogel featuring hierarchical conduits and an outer carbon‐fiber shell directs rapid water transport, confines heat, and enables directional salt migration. Radial temperature gradients in the conical structure trigger Marangoni‐driven edge‐localized salt crystallization while maintaining an unobstructed photothermal ...
Shuyue Feng +8 more
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Fluid Mixing during Phase Separation in Crystallizing White Dwarfs
The Astrophysical JournalAccurate models of cooling white dwarfs must treat the energy released as their cores crystallize. This phase transition slows the cooling by releasing latent heat and also gravitational energy, which results from phase separation: liquid C is released ...
M. H. Montgomery, Bart H. Dunlap
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Anelastic Magnetohydrodynamic Equations for Modeling Solar and Stellar Convection Zones
The Astrophysical Journal Supplement Series, 1999 The anelastic approximation has strong advantages for numerical simulations of stellar and solar convection zones. The chief and generally known one is that it suppresses acoustic modes, permitting larger simulated time steps to be taken than would be possible in a fully compressible model.
S. R. Lantz, Y. Fan
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Advanced Science, EarlyView.The barrier layer is designed comprehensively by thermal expansion coefficient and interfacial reaction energy to yield a controlled interfacial reaction. Ultimately, the Co25Fe50Ni25/half‐Heusler joint simultaneously achieves low contact resistivity and high bonding strength.
Jian Liang +11 more
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On the Temporal Variability in the Magnetic Dichotomy of Late M Dwarf Stars
The Astrophysical JournalRapidly rotating late M dwarfs are observed in two different branches of magnetic activity, although they operate in the same stellar parameter range. Current empirical evidence indicates that M dwarfs with spectral types ranging from M3/M4 to late-type ...
Giuseppina Nigro +6 more
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