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Marie Debacq

Bio: Marie Debacq is an academic researcher from Conservatoire national des arts et métiers. The author has contributed to research in topics: Kiln & Rotary kiln. The author has an hindex of 12, co-authored 30 publications receiving 409 citations. Previous affiliations of Marie Debacq include École nationale supérieure des industries chimiques & Université Paris-Saclay.

Papers
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Journal ArticleDOI
TL;DR: In this article, a pre-treatment process of olive mill wastewaters based on ozonation was studied, where an ejector was chosen as gas/liquid contactor.

85 citations

Journal ArticleDOI
TL;DR: The influence of the density contrast (characterized by the Atwood number At) on gravity-induced mixing between two miscible fluids in a long vertical tube has been studied experimentally.
Abstract: The influence of the density contrast (characterized by the Atwood number At) on gravity-induced mixing between two miscible fluids in a long vertical tube has been studied experimentally. Cross-section averaged fluid concentration profiles along the tube are measured optically: for large enough At values, they display a self-similar dependence in a broad range of times and distances and verify a diffusion law with an effective diffusivity 105 times higher than for molecular diffusion. At lower At values, this diffusive domain is limited by a sharp front moving at a velocity increasing with At. Below a threshold At value the diffusive behavior disappears.

55 citations

Journal ArticleDOI
TL;DR: In this paper, the Atwood number is used to measure the mixing of two fluids in long vertical tubes, and the mean concentration profile C(x,t) follows a diffusive spreading law characterized by a diffusivity D.
Abstract: Gravity-induced mixing of two fluids in long vertical tubes is studied experimentally as a function of the density contrast characterized by the Atwood number At (10−5 to 0.2), the fluid viscosity ν (1 to 16×10−6 m2 s−1) and the tube diameter d (2 to 44 mm). At low density contrasts, a stable counterflow is observed over a large fraction of the tube and its region of existence increases at high viscosities and small tube diameters. For larger density contrasts, the flow is either convective or turbulent and the mean concentration profile C(x,t) follows a diffusive spreading law characterized by a diffusivity D. An unexpected increase of D and of the characteristic velocity Vf of random fluid motions is observed when ν increases. This results from the coarser mixing in more viscous fluids which increases local density contrasts and buoyancy forces. Dimensionless plots of the diffusion coefficient D/ν as a function of the Reynolds number of the flow indicate a transition between two different diffusive reg...

53 citations

Journal ArticleDOI
TL;DR: In this article, the axial dispersion coefficient of the solid particles within a rotary kiln at room temperature and equipped with lifters has been analyzed for the continuous flow of sand and broken rice.

51 citations

Journal ArticleDOI
TL;DR: In this article, the effects of the kiln slope, rotational speed, mass flow rate of materials, and exit dam height on the hold-up and the mean residence time (MRT) were determined from the residence time distribution measurements.

38 citations


Cited by
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Journal ArticleDOI
01 Jul 1968-Nature
TL;DR: The Thermophysical Properties Research Literature Retrieval Guide as discussed by the authors was published by Y. S. Touloukian, J. K. Gerritsen and N. Y. Moore.
Abstract: Thermophysical Properties Research Literature Retrieval Guide Edited by Y. S. Touloukian, J. K. Gerritsen and N. Y. Moore Second edition, revised and expanded. Book 1: Pp. xxi + 819. Book 2: Pp.621. Book 3: Pp. ix + 1315. (New York: Plenum Press, 1967.) n.p.

1,240 citations

Journal ArticleDOI
TL;DR: The available technologies for the abatement of phenol from water and gaseous streams are briefly reviewed, and the recent advancements summarized.

1,175 citations

Journal ArticleDOI
TL;DR: In this article, Zhou et al. presented the initial condition dependence of Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) mixing layers, and introduced parameters that are used to evaluate the level of mixedness and mixed mass within the layers.

606 citations

Book ChapterDOI
15 Mar 2017
TL;DR: In this paper, the sources and reactivity of phenolic compounds in water, their toxic effects on humans, and methods of their removal from water are discussed with attention on both conventional and advanced methods.
Abstract: Phenolic compounds exist in water bodies due to the discharge of polluted wastewater from industrial, agricultural and domestic activities into water bodies. They also occur as a result of natural phenomena. These compounds are known to be toxic and inflict both severe and long‐lasting effects on both humans and animals. They act as carcino‐ gens and cause damage to the red blood cells and the liver, even at low concentrations. Interaction of these compounds with microorganisms, inorganic and other organic com‐ pounds in water can produce substituted compounds or other moieties, which may be as toxic as the original phenolic compounds. This chapter dwells on the sources and reactivity of phenolic compounds in water, their toxic effects on humans, and methods of their removal from water. Specific emphasis is placed on the techniques of their removal from water with attention on both conventional and advanced methods. Among these methods are ozonation, adsorption, extraction, photocatalytic degradation, biological, electro‐Fenton, adsorption and ion exchange and membrane‐based separation.

237 citations