Results 51 to 60 of about 41,996 (315)

Vertical natural convection: application of the unifying theory of thermal convection [PDF]

Journal of Fluid Mechanics, 2015
AbstractResults from direct numerical simulations of vertical natural convection at Rayleigh numbers $1.0\times 10^{5}$–$1.0\times 10^{9}$ and Prandtl number $0.709$ support a generalised applicability of the Grossmann–Lohse (GL) theory, which was originally developed for horizontal natural (Rayleigh–Bénard) convection. In accordance with the GL theory,
Chong Shen Ng, Andrew Ooi, Detlef Lohse, Daniel Chung   +3 more
openaire   +4 more sources

Longer Acting Injectable: Continuous, Linear Release of a Progestin Contraceptive From an Oxidized Porous Silicon Host

Advanced Healthcare Materials, EarlyView.
Progestin drugs are loaded into a mesoporous silicon dioxide host by melt‐infiltration. Drugs that decompose at or close to their melting point can be loaded by the addition of cholesterol, which acts as a melting point suppressor. High mass loading of the drug is achieved, and dissolution of the composite is controlled by the nanoscale properties of ...
Geoffrey Hollett, Ruhan Fan, Tushar Kumeria, Heidi Leonard, Byungji Kim, Taylor R. Martin, Irmak Ipekci, Joanna Wang, Jiuk Byun, Nicole A. Chan, Amber Pierron, Curtis E. Moore, Jennifer Ayres, Michael J. Sailor   +13 more
wiley   +1 more source

Topology optimisation for natural convection problems [PDF]

International Journal for Numerical Methods in Fluids, 2014
SummaryThis paper demonstrates the application of the density‐based topology optimisation approach for the design of heat sinks and micropumps based on natural convection effects. The problems are modelled under the assumptions of steady‐state laminar flow using the incompressible Navier–Stokes equations coupled to the convection‐diffusion equation ...
Joe Alexandersen, Niels Aage, Casper Schousboe Andreasen, Ole Sigmund   +3 more
openaire   +4 more sources

Impact of Fiber Orientation in Electrospun PLA Scaffolds on Fluid Dynamics in a Custom Microfluidic Device

Advanced Healthcare Materials, EarlyView.
Fiber orientation in electrospun scaffolds affects permeability and fluid dynamics in microfluidic devices. Combining experimental data with computational fluid dynamic simulations, we show that aligned fibers enhance flow uniformity, reduce pressure and shear stress variability.
Elisa Capuana, Maria Testa, Chiara Di Marco, Francesco Lopresti, Vincenzo La Carrubba   +4 more
wiley   +1 more source

Discussion: “Integral Methods in Natural-Convection Flow” (Levy, Salomon, 1955, ASME J. Appl. Mech., 22, pp. 515–522) [PDF]

, 1956
Carl Wagner
openalex   +2 more sources

The effects of transient heat flux on the tube in contact with the natural convection, on enthalpy and entropy generation, for developed laminar flow of fluid with high Prandtl number [PDF]

Chemical Review and Letters, 2019
Heat flux is passed through the tube wall with natural convection in a tube wall of developed laminar flow. Tubes are used to find the best case with the minimum enthalpy and entropy generation.
Reza Kakulvand
doaj   +1 more source

Hierarchically MOF‐Based Porous Monolith Composites for Atmospheric Water Harvesting

Advanced Materials, EarlyView.
This review explores the design of hierarchical porous materials for atmospheric water harvesting, focusing on metal‐organic frameworks (MOFs) and porous monoliths. Emphasis is placed on integrating MOF nanoscale porosity with the microscale channels of monolithic scaffolds to enhance sorption‐desorption performance.
Mahyar Panahi‐Sarmad, Tianyu Guo, Seyyed Alireza Hashemi, Ahmadreza Ghaffarkhah, Stefan Wuttke, Mohammad Arjmand, Orlando J. Rojas, Feng Jiang   +7 more
wiley   +1 more source

Numerical Analysis of Turbulent Mixed Convection in Vertical Annular Channel

Yuanzineng kexue jishu, 2023
Reactor cavity cooling system (RCCS) is a competitive residual heat removal scheme for small modular reactors. In this paper, the RCCS has been simplified to a scenario that ascending air flow is got heated in vertical annular channels and driven by ...
HU Xiangjie;WEN Jiming;GAO Puzhen;TIAN Ruifeng
doaj  

Ultrafast Laser Synthesis of Zeolites

Advanced Materials, EarlyView.
The study presents a novel ultrafast laser‐driven synthesis technique for zeolites directly in liquid. Laser pulses create a microscopic reactor that controls reaction kinetics at femto‐ and picosecond timescales. Nonlinear light‐matter interactions drive nucleation and growth, allowing the process to be paused at any stage of self‐assembly.
Sezin Galioglu, Mehdi Hagverdiyev, Meryem M. Doğan, Özgün Yavuz, Ü. Seleme Nizam, Ghaith Makey, Aladin Şura, Mesut Laçin, Burcu Akata Kurç, Parviz Elahi, F. Ömer Ilday, Serim Ilday   +11 more
wiley   +1 more source

Engineering Magnetotactic Bacteria as Medical Microrobots

Advanced Materials, EarlyView.
Magnetotactic bacteria (MTB) are living microorganisms that produce magnetosomes for navigation using the Earth's geomagnetic field. Their built‐in magnetic components, along with their intrinsic and/or modified biological functions, make them one of the most promising platforms for making future living and programmable microrobots.
Jiaqi Wang, Yi Xing, Michael Ngatio, Paulina Bies, Lu Lucy Xu, Liuxi Xing, Ahmed Zarea, Ashley V. Makela, Christopher H. Contag, Jinxing Li   +9 more
wiley   +1 more source