Results 51 to 60 of about 624,231 (327)

Convection and oscillations [PDF]

Astronomische Nachrichten, 2010
AbstractIn this short review on stellar convection dynamics I address the following, currently very topical, issues: (1) the surface effects of the Reynolds stresses and nonadiabaticity on solar‐like pulsation frequencies, and (2) oscillation mode lifetimes of stochastically excited oscillations in red giants computed with different time‐dependent ...
openaire   +4 more sources

Crystal‐Symmetry‐Driven Build Orientation and its Impact on the {110}<100> Goss Texture Formation and Mechanical Properties of Laser Powder Bed Fused AISI 316L

Advanced Engineering Materials, EarlyView.
This study explores a crystal‐symmetry‐based approach to optimize mechanical properties in laser powder bed fused AISI 316L with predominant {110}<100> Goss textures. By varying the build orientation, the microstructure can be tailored and the tensile properties optimized. The tilted build (T110) achieved the highest strength while preserving ductility,
Daniel Rainer, Jithin James Marattukalam, Dennis Karlsson, Přemysl Beran, Charles Hervoches, Gabriella Andersson, Prabhat Pant, Martin Sahlberg   +7 more
wiley   +1 more source

The core helium flash revisited III. From Pop I to Pop III stars

, 2010
Degenerate ignition of helium in low-mass stars at the end of the red giant branch phase leads to dynamic convection in their helium cores. One-dimensional (1D) stellar modeling of this intrinsically multi-dimensional dynamic event is likely to be ...
Campbell, Simon W., Kifonidis, Konstantinos, Mocak, Miroslav, Mueller, Ewald   +3 more
core   +1 more source

Reactive Interaction and Wetting of Fe‐ and Mn‐Containing, Secondary AlSi Alloys with Manganese Oxide Ceramic Filter Material for Fe Removal

Advanced Engineering Materials, EarlyView.
Fe‐ and Mn‐containing AlSi alloys undergo aluminothermic reaction with Mn oxide in sessile‐drop and crucible experiments forming poor‐wetting Al2O3 while Mn enriches in the alloy. Primary Fe‐containing particles are preferentially attached to the Mn oxide.
Hanka Becker, Simon Waschull, Beate Fankhänel, Claudia Voigt, Alexandros Charitos, Christos G. Aneziris, Andreas Leineweber   +6 more
wiley   +1 more source

Rayleigh-Benard convection with phase changes in a Galerkin model

, 2011
The transition to turbulence in Rayleigh-Benard convection with phase changes and the resulting convective patterns are studied in a three-dimensional Galerkin model.
Pauluis, Olivier, Schumacher, Joerg, Weidauer, Thomas   +2 more
core   +1 more source

A Simulative Evaluation of Triply Periodic Minimal Surface Structures in the Context of Elastocaloric Applications

Advanced Engineering Materials, EarlyView.
A simulative evaluation of triply periodic minimal surface (TPMS) structures for an elastocaloric application under compressive load is performed. For the evaluation of the structure's performance, surface/volume ratio, generated heat and invested mechanical work are taken into account and are compared to a tube as a reference specimen.
Michael Fries, Paul Motzki, Dirk Bähre, Anne Jung   +3 more
wiley   +1 more source

Estudo da variabilidade da cobertura de nuvens altas na Amazônia Central Study of the variability of high cloud covering over Central Amazon region

Acta Amazonica, 2007
Foram estudados os fenômenos meteorológicos que ocorrem na Amazônia Central (Manaus) utilizando-se um conjunto de imagens de satélites, com o objetivo de identificar as oscilações que mais contribuem para a variabilidade da cobertura de nuvens, e ...
Maria Aparecida Senaubar Alves, Luiz Augusto Toledo Machado, Gannabathula Sri Sesha Durga Prasad   +2 more
doaj   +1 more source

Convection in Microemulsions [PDF]

, 1991
The Rayleigh-Benard convection in the microemulsion C4E2 (surfactant)-water-cyclohexane (oil) is presented from the onset of convection to the phase separation of the microemulsion. The travelling waves, steady convection, the transition from the roll pattern to the polygon pattern and the type-I intermittency route to chaos were observed and recorded ...
Lopezquintela, M, Fernandeznovoa, A, Korneta, W   +2 more
openaire   +2 more sources

Study of the Effect of Process Parameters and Heat Treatment on the Formation and Evolution of Directed Energy Deposition of IN718‐CuCrZr Interface

Advanced Engineering Materials, EarlyView.
Bimetallic structures of Inconel 718 and CuCrZr are fabricated using the laser powder directed energy deposition method. The study reveals a strong dependence of interface characteristics such as width and interfusion on processing and heat treatment strategies.
Hamidreza Javidrad, Bahattin Koc
wiley   +1 more source

Mesoscale Convective Systems Modulated by Convectively Coupled Equatorial Waves

Geophysical Research Letters, 2023
Mesoscale convective systems (MCSs) produce over 50% of tropical precipitation and account for the majority of extreme rainfall and flooding events. MCSs are considered the building blocks of larger‐scale convectively coupled equatorial waves (CCEWs ...
Yuan‐Ming Cheng, Juliana Dias, George Kiladis, Zhe Feng, L. Ruby Leung   +4 more
doaj   +1 more source