Results 31 to 40 of about 29,066 (266)

The Effects of Engineered Aeration on Atmospheric Methane Flux From a Chesapeake Bay Tidal Tributary

Frontiers in Environmental Science, 2022
Engineered aeration is one solution for increasing oxygen concentrations in highly eutrophic estuaries that undergo seasonal hypoxia. Although there are various designs for engineered aeration, all approaches involve either destratification of the water ...
Laura L. Lapham, Edward A. Hobbs, Jeremy M. Testa, Andrew Heyes, Melinda K. Forsyth, Casey Hodgkins, Curtis Szewczyk, Lora A. Harris   +7 more
doaj   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

CFD model simulation of bubble surface area flux in flotation column reactor in presence of minerals

International Journal of Mining Science and Technology, 2018
Bubble surface area flux (Sb) is one of the main design parameter in flotation column that typically employed to describe the gas dispersion properties, and it has a strong correlation with the flotation rate constant.
A.R. Sarhan, J. Naser, G. Brooks
doaj   +1 more source

Modelling of removal of surfactants from liquid solutions in a bubble column

Results in Engineering, 2022
This paper proposes a theoretical model for the separation of a surfactant from water in a bubble column. The proposed model includes both mass balance and adsorption thermodynamics of surfactants on bubble surfaces in the liquid solution (e.i.
Arturo A. García-Figueroa, Boris Albijanic, Mitzi A. Zarazua-Escobar, José L. López-Cervantes, Jesús Gracia-Fadrique   +4 more
doaj   +1 more source

Unified modeling of bubbly flows in pipes, bubble columns, and airlift columns

Chemical Engineering Science, 2017
Abstract Multiphase CFD simulation is a valuable tool in process engineering which is particularly useful to study new reactor concepts and their scale-up from laboratory to production scale. Simulations of bubbly flows up to industrial dimensions are feasible within the Eulerian two-fluid framework of interpenetrating continua.
Rzehak, R., Ziegenhein, T., Kriebitzsch, S., Krepper, E., Lucas, D.   +4 more
openaire   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Effect of pressure on gas holdup in a bubble column and a slurry bubble column.

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 1991
The bubble column is a stainless steel tube with inner diameter of 45 mn and has a cone-shaped bottom. The height of the multiphase contacting section was varied from 0.83 to 1.40 m. The gas was sparged into the column through a single nozzle with inner diameter of 0.59, 1.0, 2.0 or 3.0 mm and with outer diameter of 14 mm.
Kojima, Hiromitsu, Okumura, Bungo, Nakamura, Akira   +2 more
openaire   +2 more sources

Microenvironmental Reprogramming by 3D Anisotropic Cardiac Extracellular Matrix Induces Nuclear Remodeling and Epigenetic Maturation of Chemically Induced Cardiomyocytes

Advanced Functional Materials, EarlyView.
A 3D anisotropic hydrogel derived from heart extracellular matrix guides cytoskeletal alignment and nuclear remodeling in reprogrammed cardiomyocyte‐like cells. This study reveals how matrix alignment modulates nuclear envelope dynamics and chromatin state, triggering transcriptional and functional maturation.
Seung Ju Seo, Mi Jeong Lee, Hyun Wook Kang, Seonhee Byeon, Soo‐Kyoung Choi, Nakwon Choi, Seung‐Woo Cho, Yoonhee Jin   +7 more
wiley   +1 more source

Electrode and Microstructure Dependence of Oxygen Diffusion in Ferroelectric Hafnium Zirconium Oxide Thin Films

Advanced Functional Materials, EarlyView.
Significant nanoscale oxygen diffusion coefficient variations are measured in ferroelectric hafnium zirconium oxide films with grain boundaries and electrode interfaces exhibiting values 104 times larger than the grain cores. Overall coefficients are 10X larger for films prepared with metal nitride electrodes compared to refractory metals. New insights
Liron Shvilberg, Thomas W. Pfeifer, Chuanzhen Zhou, Yong Kyu Choi, Duk‐Hyun Choe, Patrick E. Hopkins, Jon F. Ihlefeld   +6 more
wiley   +1 more source

Hydrodynamic Characteristics of a Gas- Liquid –Solid Fluidized Bed Containing a Binary Mixture of Particles [PDF]

Engineering and Technology Journal, 2009
The present work is an experimental study on the effect of solid loading andsolid properties of both single and binary mixtures on the hydrodynamic parameters(gas holdup and bubble dynamics) of a fluidized bed bubble column. The experimentswere performed
Amer A. Abdul Rahman, Mohammed F. Abed, Adiba A .Mahmod   +2 more
doaj   +1 more source