Results 51 to 60 of about 3,733,185 (287)

A possible theory for the interaction between convective activities and vortical flows [PDF]

Nonlinear Processes in Geophysics, 2011
Theoretical studies usually attribute convections to the developments of instabilities such as the static or symmetric instabilities of the basic flows. However, the following three facts make the validities of these basic theories unconvincing.
N. Zhao, X. Y. Shen, Y. H. Ding, M. Takahashi   +3 more
doaj   +1 more source

Thermal vibrational convection in near-critical fluids. Part 1. Non-uniform heating [PDF]

, 2006
A theoretical model describing the response of a single-phase near-critical fluid to small-amplitude, high-frequency translational vibrations is developed on the basis of the multiple-scale and averaging methods.
Vorobev, Anatoliy, Lyubimov, Dimitry, Mojtabi, Abdelkader, Zappoli, Bernard, Lyubimova, T., Vorobev, A., Lyubimov, D., Lyubimova, Tanya, Mojtabi, A., Zappoli, B.   +9 more
core   +1 more source

Critical Coupling in Semi‐Trasparent Fano Resonators for Photothermal Converters

Advanced Functional Materials, EarlyView.
An ultrathin metal–insulator multilayer architecture is engineered to exploit Fano‐resonant critical coupling, completely suppressing optical reflectance while achieving a balanced 50:50 trade‐off between absorbance and transmittance. Upon laser excitation at resonance, the metamaterial generates intense localized heat (ΔT≈550∘C$\Delta T {\approx }550^\
Giuseppe Emanuele Lio, Giuseppe Nicoletta, Roberto Caputo, Antonio Ferraro   +3 more
wiley   +1 more source

Cooling photovoltaic panels with air convection – Parametric environmental and economic analysis with case studies

e-Prime: Advances in Electrical Engineering, Electronics and Energy
Photovoltaic (PV) panels generate electricity due to photoelectric effect, harvesting solar radiation from the sun. However, the hit of photons on the upper surface of the PV panel increases its temperature, and as a result, decreases its efficiency. The
Tarek Ibrahim, Jalal Faraj, Khalid Kisswani, Georges El Achkar, Rabih Murr, Mahmoud Khaled   +5 more
doaj   +1 more source

Modelling the effect of free convection on permafrost melting rates in frozen rock clefts [PDF]

The Cryosphere
This research develops a conceptual model of a karst system subject to mountain permafrost. The transient thermal response of a frozen rock cleft after the rise in the atmospheric temperature above the melting temperature of water is investigated using ...
A. Sedaghatkish, A. Sedaghatkish, F. Doumenc, F. Doumenc, P.-Y. Jeannin, M. Luetscher   +5 more
doaj   +1 more source

A Miniaturized Autonomous Thermomagnetic Generator

Advanced Functional Materials, EarlyView.
Micro, autonomous and high power thermomagnetic generator operating between a heat dissipator and a processor. ABSTRACT Thermomagnetic generators (TMG) are promising devices for converting low‐grade waste heat into electricity. Self‐actuation using permanent magnets is the key to autonomy.
Morgan Almanza, Doan Nguyen Ba, Nesrine Belkadi, Erika Fontana, Jean‐Eudes Duvauchelle, Sukhendu Sadhukhan, Loïc Becerra, Thibaut Devillers, Massimiliano Marangolo, Fabien Parrain, Nora M. Dempsey, Martino LoBue   +11 more
wiley   +1 more source

How the Porous Transport Layer Dictates Membrane Electrode Assembly Performance of IrO2 Catalysts

Advanced Functional Materials, EarlyView.
The Schottky barrier formed at the catalyst | PTL interface critically governs both the initial performance and long‐term durability of the PEMWE, and its magnitude is dictated by the catalyst's work function. This limitation can be resolved by combining a rutile IrO2 core for efficient electron transfer with an amorphous IrOx shell for high surface ...
Hyeseong Jeon, Seunghee Han, Jonghyeon Park, Sujin Park, Wonjae Lee, Jihan Kim, Hyunjoo Lee   +6 more
wiley   +1 more source

Novel perspectives on multiple-peak diurnal convection over a tropical mountainous island from idealized large-eddy simulations

npj Climate and Atmospheric Science
Two robust peaks in the diurnal evolution of orographically-locked precipitation are simulated in large-eddy simulations with an idealized ocean-plain-mountain topography.
Yu-Hsiu Wang, Wei-Ting Chen, Chien-Ming Wu   +2 more
doaj   +1 more source

Limits to the Hall Effect and Other Nonreciprocal Effects in Three‐Dimensional Metamaterials

Advanced Materials, EarlyView.
Comprehensive and fundamental bounds on nonreciprocal effects in three‐dimensional metamaterials are derived. They reveal that the effective Hall mobility cannot exceed the largest constituent mobility, that, under certain conditions, the Verdet constant cannot be enhanced, and that, for constituents with Hall coefficients of the same sign, the largest
Christian Kern, Graeme W. Milton
wiley   +1 more source

Transition of thermally induced flow in a square cavity using Spectral Method [PDF]

E3S Web of Conferences
This study presents a novel mesh-free method for simulating natural convection in a square cavity filled with Newtonian fluid. The proposed algorithm integrates mesh-free Spectral methods with the Moving Collocation Element (MCOE) technique and employs a
Laasl Boutayna, Hilali Youssef, Mesmoudi Said, Askour Omar, Bourihane Oussama   +4 more
doaj   +1 more source