Relevant bibliographies by topics / Particle feeding techniques

Academic literature on the topic 'Particle feeding techniques'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Particle feeding techniques.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Particle feeding techniques"

1

Riisgård, Hans Ulrik, and Poul S. Larsen. "A comment on experimental techniques for studying particle capture in filter-feeding bivalves." Limnology and Oceanography 45, no. 5 (July 2000): 1192–95. http://dx.doi.org/10.4319/lo.2000.45.5.1192.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Wang-Li, Lingjuan, Zihan Cao, Michael Buser, Derek Whitelock, Calvin B. Parnell, and Yuanhui Zhang. "Techniques for measuring particle size distribution of particulate matter emitted from animal feeding operations." Atmospheric Environment 66 (February 2013): 25–32. http://dx.doi.org/10.1016/j.atmosenv.2012.08.051.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Klump, J. Val, John R. Krezoski, Michael E. Smith, and Jerry L. Kaster. "Dual Tracer Studies of the Assimilation of an Organic Contaminant from Sediments by Deposit Feeding Oligochaetes." Canadian Journal of Fisheries and Aquatic Sciences 44, no. 9 (September 1, 1987): 1574–83. http://dx.doi.org/10.1139/f87-190.

Full text
Abstract:
The assimilation of [14C]2,4,5,2′,4′,5′-hexachlorobiphenyl (HCBP) from Lake Michigan sediments by oligochaete worms was determined in laboratory microcosms using dual tracer techniques. Particle size selective feeding by oligochaetes makes single tracer calculations of assimilation from bulk feces subject to errors resulting from the changing distribution coefficients of adsorbed constituents as a function of particle size. 51Cr3+ adsorbed to sediments passes through the guts of worms without being assimilated and serves as a conservative tracer of ingestion. Assimilation efficiencies for HCBP decreased from 36 to 15% over the initial 10 d of active feeding and was inversely related to average defecation rate which increased from 0.05 to 0.25 mg sediment∙mg worm−1∙h−1 over the same period. In combination with measured defecation rates, assimilation efficiencies were used to estimate HCBP uptake rates of 3.9–8.1 pmol∙mg worm−1∙h−1. Assimilation efficiencies appear to be dependent upon gut clearing times which are a function of both gut volume and feeding rate and which are estimated to vary from <1 to >5 h.
APA, Harvard, Vancouver, ISO, and other styles
4

Janssen, Pauline H. M., Sébastien Depaifve, Aurélien Neveu, Filip Francqui, and Bastiaan H. J. Dickhoff. "Impact of Powder Properties on the Rheological Behavior of Excipients." Pharmaceutics 13, no. 8 (August 4, 2021): 1198. http://dx.doi.org/10.3390/pharmaceutics13081198.

Full text
Abstract:
With the emergence of quality by design in the pharmaceutical industry, it becomes imperative to gain a deeper mechanistic understanding of factors impacting the flow of a formulation into tableting dies. Many flow characterization techniques are present, but so far only a few have shown to mimic the die filling process successfully. One of the challenges in mimicking the die filling process is the impact of rheological powder behavior as a result of differences in flow field in the feeding frame. In the current study, the rheological behavior was investigated for a wide range of excipients with a wide range of material properties. A new parameter for rheological behavior was introduced, which is a measure for the change in dynamic cohesive index upon changes in flow field. Particle size distribution was identified as a main contributing factor to the rheological behavior of powders. The presence of fines between larger particles turned out to reduce the rheological index, which the authors explain by improved particle separation at more dynamic flow fields. This study also revealed that obtained insights on rheological behavior can be used to optimize agitator settings in a tableting machine.
APA, Harvard, Vancouver, ISO, and other styles
5

Beninger, Peter G., and Marcel Le Pennec. "Histochemistry of the Bucco-Oesophageal Glands of Mytilus Edulis: The Importance of Mucus in Ingestion." Journal of the Marine Biological Association of the United Kingdom 73, no. 1 (February 1993): 237–40. http://dx.doi.org/10.1017/s002531540003277x.

Full text
Abstract:
Histochemical techniques were used to investigate the possible role of the buccooesophageal glands in the blue mussel, Mytilus edulis L. (Mollusca: Bivalvia). No activity was observed for any of the eight major digestive enzymes tested; however, the glands contained large amounts of both neutral and acid mucopolysaccharides. These results confirm the importance of mucus in the ingestive process in M. edulis, and do not support the hypothesis of ingestion of particles suspended in water alone.Until recently it was thought that the Bivalvia were the only class of molluscs in which some type of secretory gland of extracellular digestive function in the bucco-oesophageal region was totally absent (Table 1). However, in a study of the mode of particle ingestion in five species of suspension-feeding bivalves, an extensive glandular complex was reported in the bucco-oesophageal region of Mytilus edulis L. only (Beninger et al., 1991). Although these glands were observed to liberate secretions into the oesophageal lumen, it was not known whether they performed any digestive function.
APA, Harvard, Vancouver, ISO, and other styles
6

Radiša, Radomir, Nedeljko Dučić, Srećko Manasijević, Nemanja Marković, and Žarko Ćojbašić. "CASTING IMPROVEMENT BASED ON METAHEURISTIC OPTIMIZATION AND NUMERICAL SIMULATION." Facta Universitatis, Series: Mechanical Engineering 15, no. 3 (December 9, 2017): 397. http://dx.doi.org/10.22190/fume170505022r.

Full text
Abstract:
This paper presents the use of metaheuristic optimization techniques to support the improvement of casting process. Genetic algorithm (GA), Ant Colony Optimization (ACO), Simulated annealing (SA) and Particle Swarm Optimization (PSO) have been considered as optimization tools to define the geometry of the casting part’s feeder. The proposed methodology has been demonstrated in the design of the feeder for casting Pelton turbine bucket. The results of the optimization are dimensional characteristics of the feeder, and the best result from all the implemented optimization processes has been adopted. Numerical simulation has been used to verify the validity of the presented design methodology and the feeding system optimization in the casting system of the Pelton turbine bucket.
APA, Harvard, Vancouver, ISO, and other styles
7

Siljanovska Petreska, Gordana, Christof van Sluijs, Clemens Auschra, and Maria Paulis. "Design of Waterborne Asymmetric Block Copolymers as Thermoresponsive Materials." Polymers 12, no. 6 (May 30, 2020): 1253. http://dx.doi.org/10.3390/polym12061253.

Full text
Abstract:
AB diblock waterborne copolymers made of styrene (St) and 2-ethylhexyl acrylate (2EHA) were synthesized by means of two-step reversible addition fragmentation chain transfer (RAFT) (mini)emulsion polymerization. Monofunctional asymmetric RAFT agent was used to initiate the polymerization. The hard polystyrene “A” block was synthesized via miniemulsion polymerization followed by 2EHA pre-emulsion feeding to form the soft “B” block. Polymerization kinetics and the evolution of the molecular weight distribution were followed during synthesis of both initial and final block copolymers. DSC measurements of the block copolymers revealed the existence of two glass transition temperatures (Tgs) and thus the occurrence of two-phase systems. Microscopic techniques (atomic force microscopy (AFM) and transmission electron microscopy (TEM)) were used to study the phase separation within the particles in the latex form, after film formation at room temperature cast directly from the latex and after different post-treatments well above the Tg of the hard-polystyrene domains, when complete particle coalescence had occurred. The morphological differences observed after different annealing temperatures were correlated with the mechanical properties analyzed by DMTA measurements. Finally, the differences found in the mechanical properties of the block copolymers annealed at different temperatures were correlated to their heat seal application results.
APA, Harvard, Vancouver, ISO, and other styles
8

Pavageau, M., E. M. Nieto, and C. Rey. "Odour and VOC confining in large enclosures using air curtains." Water Science and Technology 44, no. 9 (November 1, 2001): 165–71. http://dx.doi.org/10.2166/wst.2001.0532.

Full text
Abstract:
Experiments were conducted on a two stream air-curtain prototype designed for VOC and odour confinement in a truck unloading area. The emphasis was placed on the air supply device. Measurements using tracer gas techniques were performed to assess the effectiveness of the system in terms of air tightness. Leakage flow rate was estimated for various feeding arrangements. Flow visualisations and particle image velocimetry measurements were carried out for a better understanding of the flow dynamics. Evidence was given of the improvements brought by the herein referred to, “double flux” configuration in comparison to traditional designs. After a brief description of the experimental facility and the basic principle underlying the approach developed, the main results are reported and discussed and recommendations are drawn. Considerations about where the effort will be directed in future works are provided.
APA, Harvard, Vancouver, ISO, and other styles
9

Zhu, D., N. M. Linke, M. Benedetti, K. A. Landsman, N. H. Nguyen, C. H. Alderete, A. Perdomo-Ortiz, et al. "Training of quantum circuits on a hybrid quantum computer." Science Advances 5, no. 10 (October 2019): eaaw9918. http://dx.doi.org/10.1126/sciadv.aaw9918.

Full text
Abstract:
Generative modeling is a flavor of machine learning with applications ranging from computer vision to chemical design. It is expected to be one of the techniques most suited to take advantage of the additional resources provided by near-term quantum computers. Here, we implement a data-driven quantum circuit training algorithm on the canonical Bars-and-Stripes dataset using a quantum-classical hybrid machine. The training proceeds by running parameterized circuits on a trapped ion quantum computer and feeding the results to a classical optimizer. We apply two separate strategies, Particle Swarm and Bayesian optimization to this task. We show that the convergence of the quantum circuit to the target distribution depends critically on both the quantum hardware and classical optimization strategy. Our study represents the first successful training of a high-dimensional universal quantum circuit and highlights the promise and challenges associated with hybrid learning schemes.
APA, Harvard, Vancouver, ISO, and other styles
10

Kavinkumar Sakthivel, Krishnanand Anilkumar, Jawahar Natarajan, and Senthil Venkatachalam. "A promising method to enhance the solubility of poorly water soluble drug by using hot-melt extrusion technique." International Journal of Research in Pharmaceutical Sciences 11, no. 3 (July 18, 2020): 3657–66. http://dx.doi.org/10.26452/ijrps.v11i3.2526.

Full text
Abstract:
More than 40% of new chemicals are of poor solubility, it causes poor bioavailability. Several techniques are available to increase the solubility of drugs, such as converting the drug into salt form, complexion, co-solvency, particle size reduction, nano-suspension, cryogenic technique, modification of crystal habit etc. Hot melt extrusion has increased wide acknowledgment in the recent past. Over the past recent three decades modern flexibility has permitted hot melt extrusion (HME) is to increase wide acknowledgment and has just settled its place in the wide range of assembling activities and pharmaceutical research advancements. HME has just been exhibited as a vigorous, novel system to cause strong scatterings so as to give time controlled, changed, broadened, and focused on medicate conveyance bringing about improved bioavailability just as taste covering of bitter Active Pharmaceutical Ingredients (APIs). Hot melt extrusion is one of the efficient technique for improving the solubility of hydrophobic drugs by forming solid dispersion. It is a solventfree process and time taken for the production is less. The process involved in this technique include, weighing/feeding, Melting, Mixing, Venting, Extrusion, Cooling, Pelletizing. Solubility of many drugs have improved by utilizing hot melt-extrusion technology. In this review, a detailed overview about Solubility enhancement of drugs by hot-melt extrusion and its applications are discussed. This review summarizes the importance and uses of solid dispersion technique for improving the solubility of poorly soluble drugs
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Particle feeding techniques"

1

Sulmasy, Daniel. The Ethics of Medically Assisted Nutrition and Hydration at the End of Life. Edited by Stuart J. Youngner and Robert M. Arnold. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780199974412.013.14.

Full text
Abstract:
This chapter examines the ethics of medically supplying nutrition and hydration to dying patients. It first considers the available treatment modalities for patients who are unable to eat or drink, including nasogastric tube feeding, percutaneous endoscopic gastrostomy tube feeding, surgical gastrostomy or jejunostomy tube feeding, proctoclysis, intravenous hydration and nutrition, total or partial parenteral nutrition, and hypodermoclysis. Before discussing the ethics of their use in palliative medicine, the medical aspects of these techniques as well as their risks and benefits are outlined. The author then proposes a classification of four critical decisional junctures along the trajectory of disease progression and highlights a number of disabling, chronic, progressive, and eventually fatal diagnoses with differing trajectories toward death. Finally, it looks at a number of ethical controversies surrounding medically assisted nutrition and hydration, including the issue of religion and the moral and psychological aspects of stopping and starting nutritional therapy.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Particle feeding techniques"

1

"emission of dust-borne odourants like volatile fatty acids (VFA) and simple phenols and indoles from piggeries, the impor­ tance of particle-borne odours, and the possibilities of con­ trolling dust-borne odours. 2. ORIGIN, NATURE AND RELEASE OF THE DUST It is estimated that the dust in animal houses originates mainly from the feed (15 ), (16 ), (17 ), the bedding material (18), (19), the manure (20) and the animals themselves (21),(22). Relevant values are rare. Table I shows that feed and bedding, when used, are the predominant sources of dust in pig and hen houses. Dust from animal houses consists mainly of organic matter (23). The preferred technique for investigating both the mate­ rial composition of the dust and feed stuff is the WEENDER An­ alysis Technique (24). Table II shows the composition of dust from pig and hen houses compared to the feed fed. The differ­ ences in the protein content between dust and feed support the opinion that an important part of the dust originates from feathers, hairs, and skin cells of the animals. The release of the dust is caused by the activity of ani­ mals or man or the function of technical equipments in the an­ imal house. Feeding, particularly dry feeding (25), as well as bedding and cleaning activities, the use of different systems of feed distribution, manure removal and ventilation (26) can increase the dust level in the air of animal houses consider­ ably (27). Figure 1 gives an example of the relation between the amount of dust in the air and different activities based on values as reported by CERMAK and ROSS (27) for poultry houses. In the course of a day the dust level in animal houses varies considerably. Mostly feeding increases the dust concen­ tration in the air as demonstrated in Figure 2 (22). However, within 30 to 120 min the "normal" background level is reached again (16),(22). The figure shows that even before the feed is distributed, the activity of the animals increases the dust concentration in the air considerably. Table III shows the influence of rel . humidity, pen vol­ ume, feeding system and air flow on the number of dust parti­ cles and weight of settled dust in an experimental piggery.The essential influence of animal activity on the formation of dust is shown by the fact that self-feeding results in significant­ ly greater atmospheric dust concentration (particles/volume of air) than does floor-feeding. However, a significantly greater amount of settled dust is associated with floor feeding. Prob­ ably, the self-fed pigs spend much more time eating than the floor-fed pigs. The intense activity of the pigs during floor feeding results in a great deal of visible dust for only a pe­ riod of time, while the self-fed pigs may play with the excess feed (28),(17). These studies indicate that the factors deter­ mining the amount of dust in confinements include animal ac­ tivity, temperature, relative humidity, ventilation rate,stock­ ing density and volumetric air-space per animal, feeding method, and nature of feed. This dust originating from various sources can carry gases, vapours and odours (7)." In Odour Prevention and Control of Organic Sludge and Livestock Farming, 336. CRC Press, 1986. http://dx.doi.org/10.1201/9781482286311-130.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Particle feeding techniques"

1

Ray, Sutapa, Soham Kanti Bishnu, Agniva Chatterjee, Hamid Raja, and Malay Gangopadhyaya. "A Study and Optimization of Different Probe Positions for Different Feeding Techniques using Particle Swarm Optimization." In 2021 IEEE International IOT, Electronics and Mechatronics Conference (IEMTRONICS). IEEE, 2021. http://dx.doi.org/10.1109/iemtronics52119.2021.9422489.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Yang, Yong, and Xiaochun Li. "Study on Ultrasonic Cavitation Based Solidification Processing and Nanoparticle Feeding for High Volume Fabrication of Aluminum Matrix Nanocomposites." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81166.

Full text
Abstract:
Lightweight metal matrix nano-composites (MMNCs) (metal matrix with nano-sized ceramic particles) can be of significance for automobile, aerospace and numerous other applications. It would be advantageous to produce low-cost as-cast bulk lightweight components of aluminum based MMNCs. However, it is extremely difficult to disperse nano-sized ceramic particles uniformly in molten aluminum. In this paper, a high power ultrasonic probe is used to disperse nano-size SiC particles in aluminum alloy A356. Experiment results show that the ultrasonic cavitation based dispersion of naoparticles in molten aluminum alloy is effective. The uniform nano particle dispersion resulted in significantly improved mechanical properties. Various nanopartilce feeding techniques were investigated and experimental results are presented.
APA, Harvard, Vancouver, ISO, and other styles
3

Joppich, Andreas, and Hermann Haselbacher. "Pneumatic Fuel Feeding of a Directly Wood Particle Fired Gas Turbine Under Special Consideration of Low Conveying Air Ratio." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-353.

Full text
Abstract:
In order to reduce the production of green house gases, the combustion of biomass has been gaining importance in electricity generation. Especially the direct combustion of biomass in gas turbines of a few MW output would offer a very attractive option because of low investment costs and high operational flexibility. Therefore, since 1991 the Institute of Thermal Turbomachines and Powerplants at the Vienna University of Technology has been working on realising a wood particle fired gas turbine with direct combustion. With reference to earlier studies (c.f. Hamrick (1991), Fredriksson and Kallner (1993)), it had been concluded that the design and the operating characteristics of the fuel feed system would strongly influence the combustion and so would be a very important part of the whole facility. Following an overview of the planned gas turbine test facility including the combustion chamber and the recently installed pneumatic fuel feed system, the paper will deal with three basic requirements of fuel feeding in the case of a directly fired gas turbine: feeding against back pressure, continuous fuel flow rate and a low conveying air ratio, which is the ratio of fuel conveying air to total combustion air of the combustion chamber. While the first two requirements, i.e. feeding against back pressure and continuous feeding, are briefly considered, the minimisation of the conveying air ratio is discussed in detail. For instance, important parameters affecting the conveying air ratio are fuel moisture, combustion air ratio and, in particular, techniques. Following theoretical estimation of the conveying air ratio, results of fuel feeding measurements are presented and conclusions drawn with respect to system integration.
APA, Harvard, Vancouver, ISO, and other styles
4

Hagen, P. A., W. Chon, and R. S. Amano. "Experimental Study of Aerodynamics Around Rotating Blades in a Lawnmower Deck." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31072.

Full text
Abstract:
The objective of this study is to investigate the flow behavior within a triple-blade lawnmower deck by means of experimental techniques. The test section was constructed for velocity measurement with an open bottom and side-discharge. Velocity measurements were collected at several different tangential and axial sections inside the deck. The flow behaviors are observed using both a Laser Doppler Velocimetry (LDV) and a high-speed video camera capturing 2000 frames per second. Several different visualization techniques have been attempted: particle feeding, water vapor injection, tuft method, and others. To further enhance the experimental accuracy, fresh sod was fed into the system simulating normal cutting conditions. Along with the extensive velocity analysis, strain and static pressure were also examined at various surface locations along the blade using linear strain gages and a piezoresistive pressure transducer. It has been observed that the deck and blade configurations share equal significance in the resultant flow profiles.
APA, Harvard, Vancouver, ISO, and other styles
5

Hagen, P. A., W. Chon, and R. S. Amano. "A Study of Aerodynamics Around Rotating Blades in a Lawnmower Deck." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33175.

Full text
Abstract:
The objective of this study is to investigate the flow behavior within a triple-blade lawnmower deck. The test section was constructed for velocity measurement with an open bottom and side-discharge. Velocity measurements were collected at several different tangential and axial sections inside the deck. The flow behaviors are observed using Laser Doppler Velocimetry (LDV) and a high-speed video camera capturing 2000 frames per second. Several different visualization techniques have been attempted: particle feeding, water vapor injection, tuft method, and others. To further enhance the experimental accuracy, fresh sod was fed into the system simulating normal cutting conditions. Along with the extensive velocity analysis, strain and static pressure were also examined at various surface locations along the blade using linear strain gages, piezoresistive pressure transducers, and Finite Element Analysis (FEA) methods. Validation of the above analyses was performed using Computational Fluid Dynamics (CFD) investigation. It has been observed that the deck and blade configurations share equal significance in the resultant flow profiles.
APA, Harvard, Vancouver, ISO, and other styles
6

Houde, Se´bastien, Monica S. Iliescu, Richard Fraser, Se´bastien Lemay, Gabriel D. Ciocan, and Claire Descheˆnes. "Experimental and Numerical Analysis of the Cavitating Part Load Vortex Dynamics of Low-Head Hydraulic Turbines." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-33006.

Full text
Abstract:
The draft tube flow is a two-sided challenge for the operation of a hydraulic turbine. On one side, it is an important component for the performance of low to medium head turbines, where it can provide up to 40% of the extracted energy from the flow. On the other side, being a diffuser with a complex vorticity distribution at the inlet, vortex breakdown instability can occur at part load and generate a corkscrewed precessing vortex that can be associated with cavitation. The cavitating vortex rope, may generate undesired power output fluctuation and/or structural vibration. Therefore, draft tubes are much studied components but hard to tackle both numerically and experimentally. Within the framework of the AxialT project, the flow in the draft tube of a propeller turbine model operating at part load was studied using a combination of two-phase Particle Image Velocimetry (PIV) measurements and Unsteady Reynolds Averaged Navier-Stokes (URANS) simulations. The paper main focus is on the experimental methodology and results. It explains how Particle Image Velocimetry measurements were implemented, validated and post-treated to provide flow measurements in the draft tube cone at part load in the cavitating and non-cavitating regimes. It also describes various image processing techniques used to extract the velocity field around the cavitating vortex rope and to estimate the location of the water-vapour interface of the cavitating region. In the spirit of feeding experimental data to numerical simulations, an analysis of measured velocity profiles just under the runner is presented. Comparison between PIV measurements and preliminary URANS simulations is also illustrated.
APA, Harvard, Vancouver, ISO, and other styles
7

Selvarajan, V., and S. Kumar. "Irregularity Parameter and Sphericity of Plasma Sprayed Nickel Powders." In ITSC2005, edited by E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2005. http://dx.doi.org/10.31399/asm.cp.itsc2005p1156.

Full text
Abstract:
Abstract Thermal spray coatings of surfaces with metal, alloy and ceramic materials for protection against corrosion, erosion and wear is an intense field of research. The technique involves injection of the powder into a plasma flame, melting, acceleration of the powder particles, impact and bonding with the substrate. Feedstock powders of thermal spray applications have to meet several requirements. Particle shape, size and its distribution, powder flow characteristics and density are the important factors to be considered in order to ensure high spray efficiency and better coating properties. For smooth and uniform feeding of powders into the plasma jet, the powder particles have to be spherical in shape. In the present investigation powder particles are fed into the thermal plasma and spheroidized. The plasma was generated in a dc atmospheric plasma spray torch operating in non-transferred mode. Plasma processed powders were allowed to cool in atmospheric air inside a plasma reactor. The particle while free fall and cooling got spheroidized by surface tension forces. The feedstock powders were in the size range from 40 to 100 microns. The processed powders were analyzed through XRD, SEM/ Optical microscopy and irregularity parameter (IP) and roundness factor were determined. The same parameters were determined through theoretical methods and compared with experimental results.
APA, Harvard, Vancouver, ISO, and other styles
8

Liu, Shuang, Fanrong Kong, Shihong Shi, and Radovan Kovacevic. "Numerical Simulation and Experimental Investigation of Gas-Powder Flow in Inner Powder Delivery System." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89573.

Full text
Abstract:
The powder concentration distribution is a key factor which affects the powder catchment efficiency, laser attenuation and, consequently, the molten pool morphology in laser cladding. A cladding technique (via a hollow laser beam with a central powder delivery system), called inner powder feeding, is presented, which can greatly increase the powder utilization. According to the structure of laser head used for inner powder feeding, a three-dimensional numerical model is developed to simulate the gas-powder flow. The influences of the carrier gas flow rate, the shielding gas flow rate, and the geometry of the gas nozzle on powder concentration distribution are investigated. An observation system is developed to capture a particle distribution image. The gray values of the particle images show that their distributions coincide with the numerical results. The model also predicts the powder catchment efficiency. Single track deposition experiments are performed and the results are compared with a four-nozzle coaxial powder feeding system.
APA, Harvard, Vancouver, ISO, and other styles
9

Solimene, R., R. Chirone, A. Marzocchella, and P. Salatino. "A Novel Technique for “In-Situ” Characterization of Devolatilization Rate of Solid Fuels in Fluidized Beds." In 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78044.

Full text
Abstract:
The characterization of volatile matter (VM) emission from solid fuel particles during fluidized bed combustion/gasification is relevant to reactor performance influencing the fate of VM as it results from competing phenomena of release, mixing/segregation and burn-out. The rate and the time-history of volatile matter release strongly affect axial segregation of fuel particles in the bed, favoring the establishment of the stratified combustion regime. On the other hand, the comparison between the devolatilization and radial solids mixing time scales affects the radial distribution of volatile matter across the reactor. Short devolatilization times determine VM release localized near feeding point. The knowledge of devolatilization kinetics, as determined by thermogravimetric analysis, does not take into account key process phenomena such as the effective time-temperature history of the devolatilizing particle. A novel and easy-to-use diagnostic technique for “in-situ” characterization of the devolatilization rate of fuel particles in gas fluidized beds is proposed in the present paper. It is based on the time-resolved measurement of pressure in a bench scale fluidized bed reactor equipped with a calibrated flow restriction at the exhaust. The procedure consists of the injection of a single fuel particle (or small batches of multiple particles) and continuous monitoring of the pressure in the reactor. The bed was kept at a constant temperature by external heating and fluidized with nitrogen. Gas pressure inside the reactor increases during devolatilization as a consequence of the increased flow rate, due to the emission of volatile matter, across the calibrated flow restriction at the exhaust. Experimental data are analyzed in the light of a model of the experiment based on the transient mass balance on the reactor volume referred to the fluidizing gas and to the volatile matter. The comparison between experimental pressure time series and model computations enables the characterization of the kinetic parameters of devolatilization rate for samples of different coals as well as of non-fossil solid fuels.
APA, Harvard, Vancouver, ISO, and other styles
10

Shahien, Mohammed, Masato Suzuki, and Kentaro Shinoda Jun Akedo. "Direct Spraying of Fine Ceramic Particles in Thermal Spray." In ITSC2018, edited by F. Azarmi, K. Balani, H. Li, T. Eden, K. Shinoda, T. Hussain, F. L. Toma, Y. C. Lau, and J. Veilleux. ASM International, 2018. http://dx.doi.org/10.31399/asm.cp.itsc2018p0515.

Full text
Abstract:
Abstract Deposition of ceramic coatings by spraying of fine powder particles is a promising solution to obtain uniform microstructure and improved properties, because it is expected to form small splats with reduced residual stress and pore size. Although direct injection of fine particles has many challenges such as poor rheological properties (e.g., low flow ability and agglomeration), and small momentum to inject and impact, it is still attractive and worth to try. From this point of view, we have improved feeding and injection technique of fine powder particles, which enables us to directly spray fine ceramic particles with a newly developed low power dc plasma torch. Preliminary results obtained with this system will be compared with those by other fine powder spray technology such as suspension plasma spray and hybrid aerosol deposition to show similarity and difference when the injection methods of the fine powder particles are different in this paper.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Particle feeding techniques' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography