Letteratura scientifica selezionata sul tema "Poudres – Dynamique des fluides"
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Articoli di riviste sul tema "Poudres – Dynamique des fluides":
Isabey, Daniel, Redouane Fodil e Bruno Louis. "Dynamique des Fluides Biologiques". La Houille Blanche, n. 4 (luglio 2005): 36–42. http://dx.doi.org/10.1051/lhb:200504005.
DARQUEY, P., J. P. ROMAIN, M. HALLOUIN e F. COTTET. "COMPACTION DYNAMIQUE DE POUDRES METALLIQUES PAR CHOC LASER". Le Journal de Physique Colloques 49, n. C3 (settembre 1988): C3–425—C3–429. http://dx.doi.org/10.1051/jphyscol:1988361.
Youcef, Ahmed, e Rachid Saim. "Simulation numérique du comportement dynamique et thermique de deux fluides en contre courant". Journal of Renewable Energies 20, n. 1 (12 ottobre 2023): 69–80. http://dx.doi.org/10.54966/jreen.v20i1.610.
Oswatitsch, K. "Rhyming, I. L., Dynamique des Fluides, Presses Polytechniques romandes 1985". ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik 66, n. 11 (1986): 524. http://dx.doi.org/10.1002/zamm.19860661103.
Jacquet-Richardet, G. "Comportement dynamique des ensembles tournants de turbomachines couplés aux fluides environnants". La Houille Blanche, n. 3-4 (giugno 1998): 93–98. http://dx.doi.org/10.1051/lhb/1998044.
Cambron, Micheline, e André G. Roy. "Vie culturelle : la turbulence comme métaphore". Globe 15, n. 1-2 (6 marzo 2013): 201–29. http://dx.doi.org/10.7202/1014632ar.
Plutniak, Sébastien, e Dimitri Aguéra. "Reliquats en devenir : une approche dynamique de l’écologie documentaire d’un laboratoire de mécanique des fluides". Sciences de la société, n. 89 (1 ottobre 2013): 54–73. http://dx.doi.org/10.4000/sds.241.
Dequeker, Édouard. "L’interaction public-privé dans le Grand Paris et le Grand Londres au prisme des écosystèmes de promotion économique". Transversalités 168, n. 1 (18 gennaio 2024): 33–53. http://dx.doi.org/10.3917/trans.168.0033.
Hunt, J. C. R. "Dynamique des Fluides. By I. L. RYHMING. Press Polytechniques Romandes, Lausaune, 1985. 448 pp. SF 130.00." Journal of Fluid Mechanics 197 (dicembre 1988): 595–97. http://dx.doi.org/10.1017/s0022112088213386.
CHATELLIER, Vincent. "Le commerce international, européen et français des produits laitiers : évolutions tendancielles et dynamiques concurrentielles". INRA Productions Animales 29, n. 3 (12 dicembre 2019): 143–62. http://dx.doi.org/10.20870/productions-animales.2016.29.3.2957.
Tesi sul tema "Poudres – Dynamique des fluides":
Marikh, Khadija. "Mélange des poudres en continu : dynamique et modélisation". Vandoeuvre-les-Nancy, INPL, 2003. http://www.theses.fr/2003INPL093N.
Jiménez, Garavito Maria Camila. "Influence of flowability improvement of powders on its dust generation capacity". Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0138.
Granular matter is ubiquitous in daily life and industry. After water, it is the second most frequently manipulated material form. However, even today, handling grains entails some sloppy and/or dangerous operations, due to poor flowability and dust emission. Although flow additives such as silica nanoparticles (S-NP) are commonly used to improve flow behaviour, dust emission is often overlooked from a formulation perspective. Therefore, this thesis aims to develop a methodology for powder product conception that preserves good flowability while minimizing dust emissions, leading to safer and less complicated processes for workers and facilities. To achieve this goal, experimental tests were carried out to improve the flowability of four industrial powders using S-NP with varying surface coverage (SC). The results indicated that S-NP main action mechanism on flow improvement is related to surface modification, which was quantified by surface energy measurements. However, dustiness results showed that increasing flowability resulted in increased dust emissions. Moreover, the propensity of a powder to release dust appears to be related to its adhesive interaction with S-NP, which was associated with surface energy and specific surface modifications. Based on the experimental characterization of the samples' flowability, dustiness, and physicochemical properties, a model was developed that predicts dustiness from flowability measurements. Furthermore, the specific surface of the samples was found to be an influential parameter for both end-use properties, allowing their prediction. These results allow the development of three formulation methodologies that could reduce S-NP use while still granting a performing and safer product conception transposable to different industries. By optimizing the formulation of powders, industries can improve their processes' safety and efficiency, reducing the potential risks and costs associated with handling granular materials. This thesis provides a useful approach to developing a systematic methodology for powder product conception that can be implemented in various industrial applications
Saker, Assia. "Étude critique de quelques techniques expérimentales d’évaluation de la coulabilité des poudres". Electronic Thesis or Diss., Université de Lorraine, 2018. http://www.theses.fr/2018LORR0314.
In industrial sectors, such as chemical, pharmaceutical or food industries, poor flowability of powders is often the causes of process malfunction. Poor flowability can lead to the blocking of powders in a silo, dosing and filling problems, or even bad quality on final product. To ensure proper process operation, it is therefore necessary and essential to evaluate the flowability of powders used. For this purpose, several experimental techniques such as angle of repose devices, shear cells or powder packing devices can be used. Flowability indices can then be defined in order to classify the powders according to the flow quality. Experimental tests have been carried out on several types of powders and the first results have shown that the transition from one technique to another can modify or even reverse the classification of the powder flowability. Indeed, according to the techniques studied, powders are subjected to different mechanical stresses and therefore the choice of the technique must be adapted to the real case of study. In this work, we were particularly interested to the evaluation of powders flowability from compaction devices. The work carried out has shown that the dynamic parameters (amplitude and frequency of taps) greatly influence the classification of powders flowability. From an energy approach, it has been shown that the evaluation of the flowability from Hausner ratio can be given by a compaction technique only if it achieves a value of energy required to obtain a maximal compaction of the particles. Finally, an implementation study of flowability evaluation techniques was carried out in the field of formulation by focusing on the quantitative evaluation of the influence of a glidant
Enferad, Shirin. "Compactage et vieillissement des poudres : influence de la formulation". Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0214.
This study is conducted in the framework of the “PowderReg” project, funded by the European program Interreg VA GR within the priority axis 4 “Strengthen the competitiveness and the attractiveness of the Grande Région Groβregion”. Understanding the link between microscopic organization and powders flow behavior is a major step forward in establishing criteria for optimizing their transport, storage and processing properties. Whereby, better understating of powder flow behavior saves the industries from huge economic loss. Therefore, it is essential to evaluate their flowability. This work consists in experimentally studying the influence of powder formulation, particle size, as well as influence of environmental condition such as humidity on flow behaviors of powders. Five types of formulations have been analyzed: control glass bead has been used as reference powder and three types of surface formulations consisting of hydrophilic, hydrophobic and lactose coating as well as agglomerated lactose powder have been prepared. First, influence of two different sizes 100 and 500 µm on flow behavior of powders has been analyzed. Then, the powders flow behavior has been considered with different experimental equipements: FT4, Granutools and Rheometer Discover HR3. Including different techniques, such as shear cell, compressibility, rotating angle of repose, etc. The objective was to figure out the behavior of powders under different processing conditions. The, results reported that the transition from one technique to another can modify the classification of the powder flowability. Since the powders were experiencing different mechanical stresses. At the last part of this thesis, we observed the impressive influence of humidity after 80 % on flow behavior of two different size of control glass beads (40 and 100 µm). Small diameter glass bead showed lower flowability which is due to the more surface contacts of these particles. Furthermore, the comparison of flow behavior of control and hydrophobic glass beads with 100 µm size at high shear rate reported the same flowability for both samples. While at low shear rate measurements by vibrational rheology revealed higher flowability in control glass bead. The flowability of control glass bead decreased dramatically after 80 % of humid control, however hydrophobic formulated glass bead kept its flow behavior like as before with very low sensitivity to humidity. Finally, influence of addition of small quantity of water on flow behavior of control glass bead has been investigated
Ansart, Renaud Dodds John Ryck Alain de. "Émission de poussières lors de la manipulation de poudre interaction entre les particules en mouvement et l'air ambiant /". Toulouse : INP Toulouse, 2008. http://ethesis.inp-toulouse.fr/archive/00000594.
Saker, Assia. "Étude critique de quelques techniques expérimentales d’évaluation de la coulabilité des poudres". Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0314.
In industrial sectors, such as chemical, pharmaceutical or food industries, poor flowability of powders is often the causes of process malfunction. Poor flowability can lead to the blocking of powders in a silo, dosing and filling problems, or even bad quality on final product. To ensure proper process operation, it is therefore necessary and essential to evaluate the flowability of powders used. For this purpose, several experimental techniques such as angle of repose devices, shear cells or powder packing devices can be used. Flowability indices can then be defined in order to classify the powders according to the flow quality. Experimental tests have been carried out on several types of powders and the first results have shown that the transition from one technique to another can modify or even reverse the classification of the powder flowability. Indeed, according to the techniques studied, powders are subjected to different mechanical stresses and therefore the choice of the technique must be adapted to the real case of study. In this work, we were particularly interested to the evaluation of powders flowability from compaction devices. The work carried out has shown that the dynamic parameters (amplitude and frequency of taps) greatly influence the classification of powders flowability. From an energy approach, it has been shown that the evaluation of the flowability from Hausner ratio can be given by a compaction technique only if it achieves a value of energy required to obtain a maximal compaction of the particles. Finally, an implementation study of flowability evaluation techniques was carried out in the field of formulation by focusing on the quantitative evaluation of the influence of a glidant
Madian, Ahmed. "Étude de l’influence des caractéristiques physiques des poudres UO2 sur leurs propriétés rhéologiques". Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2461/document.
The nuclear fuel for the fourth generation sodium-cooled fast neutron reactors presents characteristics which differentiate it from that used in Pressurized Water Reactors: a homogeneous structure (U,Pu)O2, an annular geometry and a high content of PuO2. The manufacturing process of the fuel pellets starts with the realization of a UO2/PuO2 mixture by co-grinding followed by forming by pressing. However, the UO2/PuO2 mixture does not exhibit the suitable properties for a reproducible filling of annular press moulds. An intermediate operation, between the co-grinding and the shaping, is necessary to facilitate the filling of the moulds. To direct the choice of this operation, a separate effects study was carried out on UO2 granules, considered as representative of the crushed powder in a first approach. The investigated target physical characteristics are the powder size distribution and morphology. Therefore, mixtures of granules of various sizes were characterized to evaluate the influence of the quantity of fines (particles with a size lower than 100 μm) on the rheological properties. In parallel an intercomparison study between shear cells of different volumes and types (Schulze cell and FT4) was carried out in order to have a good compromise between the quantity of powder used and the quality of the results. A first objective was to determine the proportion of fines acceptable. Then to evaluate the effect of the surface quality of the granules, an operation of spheroidization was carried out. This resulted in modifying the granules roughness. It has been shown that both the fines ratio and the surface roughness are influential parameters that make it possible to modify the rheological properties. In particular within the framework of this study, the presence of fines with a size lower than 100 μm does not seem to have a negative impact on incipient flow up to about 10 w%. On the contrary, other properties such as permeability are sensitive to the fines amount, even below 10 w%. A spheroidization stage enables to improve incipient flow properties of the powder even above 10 w% of fines. These results lead to two possible action modes, which are the grain size selection and the spheroidization, the latter being the most adapted for our application
Boumehdi, Leïla. "Hydrodynamique et transfert thermique d’un contre-courant gaz-solides à travers un faisceau tubulaire". Compiègne, 1985. http://www.theses.fr/1985COMPI191.
Li, Ming. "Study of the FT4 powder rheometer : comparison of the test methods and optimization of the protocols". Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2327/document.
This research has been dedicated to evaluate the reliability of the FT4 and to improve the current tests for a better and convenient powder characterization. Firstly, efforts are made to explore the differences between the compaction test provided by the FT4 and the traditional tapped density measurement. Results indicate that the FT4 compaction test has good repetability but it may underestimate powder compressibility. This method can be optimized by improving its initialization procedure to give consistent results as the tapped density measurement. Secondly, the shear tests provided by the FT4 are evaluated by comparing with the methodologies provided by Schulze Ring Shear Tester and Evolution Powder Tester. This comparison indicates that the FT4 shear cell test may underestimate powder strength, especially when a cohesive powder sample is measured, which may cause blockage when using the FT4 method to design a silo. To overcome this shortage, the dimensions of the shear accessories should be optimized. Most importantly, a new characterization technique has been developed. ln this method, powder materials present periodic motions and the cycle time of the periodic flow can be linked to the powder flow properties. This method has very good capability to identify and classify powder flow properties under low stress conditions
Ansart, Renaud. "Émission de poussières lors de la manipulation de poudre : interaction entre les particules en mouvement et l'air ambiant". Toulouse, INPT, 2007. http://ethesis.inp-toulouse.fr/archive/00000594/.
In all cases where powders are handled there is the risk of particles becoming dispersed in the atmosphere leading to suspension in air and eventually deposits on surfaces. Suspension in air means loss of product and more seriously risks to health when operators come into contact with powders by ingestion, or inhalation. Thiscan lead to health problems such as lung cancer or even poisoning if the powders are toxic. This work has been carried out to an experimental set up characterising the mechanisms of dust emission from a falling stream of powders. The aim of this thesis is to design and build an experimental set-up to study the mechanisms by which particles become suspened in air from a stream of particles falling from a silo. The characteristics of the falling stream are observed and measured by optical methods involving, PIV, image analysis and laser diffraction particle size analysis. Mass balances on solids and induced air are determined and compared with a numerical model
Libri sul tema "Poudres – Dynamique des fluides":
Ecole d'été de physique théorique (Les Houches, Haute-Savoie, France) (47th 1987). Dynamique des fluides astrophysiques =: Astrophysical fluid dynamics. Amsterdam: North-Holland, 1993.
ISIN, Lefebvre Jean ingénieur. Mesure des débits et des vitesses des fluides. Paris: Masson, 1986.
Ryhming, Inge L. Dynamique des fluides: Un cours de base du deuxième cycle universitaire. Lausanne: Presses Polytechniques Romandes, 1985.
Kelly, Ryan T. Advances in microfluidics. Rijeka, Croatie: In Tech, 2012.
Dixon, S. L. Fluid mechanics and thermodynamics of turbomachinery. 4a ed. Boston: Butterworth-Heinemann, 1998.
Dixon, S. L. Fluid mechanics, thermodynamics of turbomachinery. 5a ed. Amsterdam: Elsevier-Butterworth-Heinemann, 2005.
Dixon, S. L. Fluid mechanics, thermodynamics of turbomachinery. 3a ed. Oxford: Butterworth Heinemann, 1995.
Giuseppe, Toscani, Boffi Vinicio, Rionero Salvatore e International Workshop on Mathematical Aspects of Fluid and Plasma Dynamics (3rd : 1988 : Salice Terme, Italy), a cura di. Mathematical aspects of fluid and plasma dynamics: Proceedings of an international workshop held in Salice Terme, Italy, 26-30 September 1988. Berlin: Springer-Verlag, 1991.
Toro, E. F. Riemann solvers and numerical methods for fluid dynamics: A practical introduction. Berlin: Springer, 1997.
Abbott, Michael B. Computational fluid dynamics: An introduction for engineers. Harlow, Essex, England: Longman Scientific & Technical, 1989.
Capitoli di libri sul tema "Poudres – Dynamique des fluides":
Caltagirone, Jean-Paul. "Dynamique des fluides parfaits - $$ Re \rightarrow \infty $$". In Physique des Écoulements Continus, 107–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39510-9_5.
"4 Dynamique des fluides visqueux, rhéologie, écoulements parallèles". In Hydrodynamique physique, 125–90. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0893-9-006.
"4 Dynamique des fluides visqueux, rhéologie, écoulements parallèles". In Hydrodynamique physique, 125–90. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0893-9.c006.
"2 Mécanique des fluides adaptée à l’océan". In Une introduction à la dynamique des océans et du climat, 43–90. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2388-8-005.
"2 Mécanique des fluides adaptée à l’océan". In Une introduction à la dynamique des océans et du climat, 43–90. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2388-8.c005.
"Chapitre 4. Dynamique des fluides visqueux, rhéologie, écoulements parallèles". In Hydrodynamique physique, 159–256. EDP Sciences, 2001. http://dx.doi.org/10.1051/978-2-7598-0274-6.c006.
PERNOD, Laëtitia. "Calcul d’interaction fluide-structure par co-simulation". In Interactions fluide-structure, 221–63. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9078.ch8.
FIGUEIREDO, Cristina. "« Éteri ». Liens de parenté, humeurs et sentiments chez les Touaregs Kel Adagh". In Les butoirs de la pensée, 43–60. Editions des archives contemporaines, 2021. http://dx.doi.org/10.17184/eac.5461.
GAILLER, Lydie, Jean-François LÉNAT e Philippe LABAZUY. "Surveillance électrique et électromagnétique des volcans". In Aléas et surveillance de l’activité volcanique 3, 263–83. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9046.ch5.