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Gabriel Wild

Bio: Gabriel Wild is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Mass transfer & Bubble. The author has an hindex of 29, co-authored 78 publications receiving 3022 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, an overview of multiphase flow metering techniques for gas/liquid analysis can be found, including nonintrusive techniques that deliver global, cross-section-averaged or local data.

325 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of liquid phase properties and gas distribution on bubble and hydrodynamic characteristics in bubble columns is investigated, with various measuring techniques used, systematic measurements of bubble size, velocity and frequency and gas hold-up are also available.
Abstract: This experimental study is aimed at investigating the effect of liquid phase properties and gas distribution on bubble and hydrodynamic characteristics in bubble columns. With the various measuring techniques used, systematic measurements of bubble size, velocity and frequency and gas hold-up are possible. Bubble size distribution and shape factors which are rarely found in literature, are also available. Water–alcohol solutions are used to simulate the behaviour of industrial non-coalescing organic mixtures. The experimental results obtained with three different spargers in the coalescence inhibiting solutions are compared with data on standard coalescing air–water system. Evolutions of bubble characteristics and gas hold-up have been interpreted successfully by considering the simultaneous influence of the hydrodynamic regime of the gas–liquid flow and of the operating regime of the distributor. It has also been put into evidence that bubble frequency measurements are good tools to evaluate distributor efficiency. The influence of the distributor has been shown to be enhanced in non-coalescing media. Bubble shape and bubble size distributions are dramatically modified by addition of minute quantities of alcohol in water. Bimodal distributions can be observed even in the homogeneous regime with orifice nozzle spargers.

295 citations

Journal ArticleDOI
TL;DR: In this paper, population balance equations have been combined to a classical hydrodynamic Euler/Euler simulation to investigate the operation of a cylindrical bubble column, showing that two domains of superficial gas velocities can be distinguished.

201 citations

Journal ArticleDOI
TL;DR: In this article, the effect of pressure on the hydrodynamics of trickle-bed reactors is investigated, and two new correlations for the pressure drop and the liquid hold-up for non-foaming liquids are proposed; they are based on 1500 experimental results.

190 citations

Journal ArticleDOI
TL;DR: In this article, a new method based on the auto-correlation function is proposed, which provides quantitative information about the characteristic time and the axial dimension of the flow structure in the prevailing regime.

164 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors present a review of bubble columns and their application, description, design and operation, application areas, fluid dynamics and regime analysis encountered and parameters characterizing the operation.

948 citations

Journal ArticleDOI
TL;DR: The most commonly used static mixers are described and compared in this article, and the key parameters needed for the selection of a suitable mixer are highlighted, as well as their respective advantages and limitations.
Abstract: This paper summarizes the field of static mixers including recent improvements and applications to industrial processes. The most commonly used static mixers are described and compared. Their respective advantages and limitations are emphasized. Efficiencies of static mixers are compared based both on theory and experimental results from the literature. The operations, which can benefit from the use of static mixers, are explored, namely, mixing of miscible fluids, liquid–liquid and gas–liquid interface generation, liquid–solid dispersion and heat transfer. Design parameters governing the performance of the various mixers in these applications are reported. The key parameters needed for the selection of a suitable mixer are highlighted.

468 citations

01 Aug 1962
TL;DR: In this article, the authors describe the first year of their first year in English language arts course, where they studied Calculus I, Chemistry I, and Expository Writing.
Abstract: First Year – Fall ......................... .............................................................................................. Credits MAT 210 ..................................... Calculus I ............................................................................. 4.0 ENG 110...................................... Expository Writing ............................................................. 3.0 CHE 210 ...................................... Chemistry I .......................................................................... 4.0 HUM 100 OR SOC 101 OR PSY 101 ........................................................................................ 6.0 Subtotal ...................................... .............................................................................................. 17

436 citations

Book ChapterDOI
01 Jan 1996
TL;DR: In this paper, the authors introduce the concept of circulating fluidized beds (CFB) and discuss the design and scale-up of CFB catalytic reactors, as well as their application in CFB boilers.
Abstract: Introduction to circulating fluidized beds. Hydrodynamics of circulating fluidized beds. Gas mixing. Solids motion and mixing. Hydrodynamic modelling. Cyclones and separation devices. Standpipes and return systems. Heat transfer. Instrumentation. CFB combustion performance. Design considerations for CFB boilers. Other gas-solid reactions. Catalytic cracking. Design and scale-up of CFB catalytic reactors. Reactor modelling. Novel configurations and variants. Future prospects. References. Index.

381 citations

Journal ArticleDOI
TL;DR: For example, the authors showed that very refractory chalcopyrite can be successfully bio-leached using both heap and stirred-tank reactors and showed that this method can be extended to the commercial extraction and recovery of cobalt.

372 citations