Academic literature on the topic 'Solid particle accumulation'

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Journal articles on the topic "Solid particle accumulation"

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Hou, Jinghui, Yifei Ma, Zihan Zhang, Xuanhe Yang, Muhua Huang, and Chunpeng Chai. "The Relationship between Solid Content and Particle Size Ratio of Waterborne Polyurethane." Coatings 9, no. 6 (2019): 401. http://dx.doi.org/10.3390/coatings9060401.

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A series of high solid content carboxylic acid/sulfonic acid waterborne polyurethanes was prepared by the emulsion dispersion method. The particle size and solid content were measured. By changing the particle size of the large particles to achieve different particle size ratios, high solid content waterborne polyurethanes were obtained at specific particle size ratios. When the particle size ratio was >7, 4–5 or 2–3, the aqueous polyurethane could reach a higher solid content (more than 56%). This indicated that solid content is related to particle size distribution in high solid content w
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Henriquez, Lira Santiago, Maria Josefina Torres, Silva Rafael Guerra, and Viñuela Jorge Zahr. "Numerical Characterization of the Solid Particle Accumulation in a Turbulent Flow through Curved Pipes by Means of Stokes Numbers." Applied Sciences 11, no. 16 (2021): 7381. https://doi.org/10.3390/app11167381.

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Introduction: The numerical study of particle-laden turbulent flows in curved pipes is crucial for various industrial processes.  However, there are few reports using numerical methods to analyze the influence of flow conditions and geometry on particle accumulation.  This work proposes a methodology to predict the accumulation of solid particles in a 90° bend using Stokes numbers specifically formulated for this configuration. Physical and Numerical Modeling Methodology: A turbulent air flow with monodispersed solid particles in a 90° bend was simulated using
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Chen, An, and Yonggang Yu. "Investigation of the Transient Gas-solid Flow in Launching System Charged with a Complex Propellant Bed." Journal of Physics: Conference Series 2920, no. 1 (2024): 012021. https://doi.org/10.1088/1742-6596/2920/1/012021.

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Abstract This work focuses on the characteristics of the particle distribution in the transient gas-solid flow during the ignition process of the modular charge (MC). A three-dimensional (3D) unsteady two-phase flow model is developed by the gas-particle coupled method for the module rupture and the particle motion. The effect of the initial loading position of the module (MILP) on the particle distribution characteristics is numerically simulated. The results show that particles distribute in the area between the module bottom and the right end face of the chamber under four conditions. The p
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Yerlepessov, Murat U., Oleg I. Zaitsev, Abay A. Yermekov, Sain K. Amirov, and Zhuginis S. Urbisinov. "Testing the functionality of OLGA software for determining optimal oil transport modes to prevent solid particle deposition." Kazakhstan journal for oil & gas industry 6, no. 3 (2024): 82–93. http://dx.doi.org/10.54859/kjogi108728.

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Background: During operation, all mechanical impurities entering the collector through the flow lines settle at the bottom due to a decrease in flow velocity. This leads to a reduction in the capacity of the pipeline network, increased pressure, and premature equipment wear. To address this issue it is essential to understand the dynamics and intensity of sludge formation at the bottom of the pipeline. Aim: Evaluate the functionality and efficiency of the dynamic multiphase flow simulator in addressing challenges related to the transport of borehole fluid containing solid particles. Materials
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Chen, An, and Yonggang Yu. "Motion Characteristics and Distribution Laws of Particles in the Launching System with a Sequence-Change Structure." Processes 12, no. 7 (2024): 1454. http://dx.doi.org/10.3390/pr12071454.

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There is a fundamental issue in the launching system with the modular charge technology, which is an unsteady gas–solid flow in the sequence-change space within a short period of time. It leads to complex particle behavior, causing the strong pulsation of particle energy released during the combustion process. As a result, a large initial pressure wave is generated, which damages the launching stability. In this work, a 3D gas–solid flow model is developed based on the computational fluid dynamics–discrete element method (CFD-DEM) model to analyze the particle behavior in the launching system
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Hernandez-Duenas, Gerardo, Ulises Velasco-García, and Jorge X. Velasco-Hernández. "A positivity-preserving central-upwind scheme for isentropic two-phase flows through deviated pipes." ESAIM: Mathematical Modelling and Numerical Analysis 53, no. 5 (2019): 1433–57. http://dx.doi.org/10.1051/m2an/2019003.

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Directional drilling in oil and gas extraction can encounter difficulties such as accumulation of solids in deviated pipes. Motivated by such phenomenon, we consider a model for isentropic two-phase flows through deviated pipes. The system of partial differential equations is aimed at simulating the dynamics between a particle bed and a gas phase. The pipe can be either horizontal or vertically deviated where the effects of gravity are incorporated. Furthermore, the acceleration or deceleration due to friction between phases is investigated and spectral properties of the hyperbolic system of b
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Ntziachristos, L., P. Pistikopoulos, and Z. Samaras. "Particle characterization from two-stroke powered two-wheelers." International Journal of Engine Research 6, no. 3 (2005): 263–75. http://dx.doi.org/10.1243/146808705x7455.

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This paper presents the physical characterization of particle emissions from small two-stroke gasoline two-wheelers. Particle samples were drawn with a dedicated partial dilution system. They were analysed with various aerosol measurement instruments, including a scanning mobility particle sizer (SMPS), an electrical low-pressure impactor (ELPI), and a diffusion charger. Solid particles were discriminated by using a thermodenuder. Results suggest that small two-wheeled vehicles are significant emitters of both solid and volatile particles with the volatile fraction being the dominant one. The
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Muniz, Gustavo Lopes, Antonio Pires de Camargo, Nassim Ait-Mouheb, and Nicolás Duarte Cano. "Geometric Characteristics of Dripper Labyrinths and Accumulation of Solid Particles: Simulation and Experimentation." AgriEngineering 7, no. 7 (2025): 217. https://doi.org/10.3390/agriengineering7070217.

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Emitter clogging in drip irrigation systems is a recurring issue, affecting water application uniformity and system lifespan. This study investigated the anti-clogging performance of emitters and the accumulation patterns of solid particles in dripper labyrinths with varied geometric configurations, combining laboratory experimentation and computational fluid dynamics simulations. Fifteen labyrinth models were tested, divided into two groups: (Model A) emitters with well-defined vortexes and (Model B) emitters with uniform flow. The tests were conducted with solid particle concentrations of 12
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Chen, Xiong, Hai Feng Xue, and Yong Luo. "Numerical Research about Two-Phase Flow under Different Acceleration in SRM with Embedded Nozzle." Applied Mechanics and Materials 365-366 (August 2013): 233–36. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.233.

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The complex gas-solid two-phase flow in a full-sized solid rocket motor with embedded nozzle under different acceleration condition was simulated with Euler-Lagrange model. Influences of different particle diameters and acceleration conditions on particle trajectories were analyzed. Simulation results show that the difference between gas flow field and two-phase flow field is significant. The particle accumulation zone above inner wall of chamber and nozzle is mainly concentrated in two regions. The accretion of the particle diameter will cause the following property worse, and the particles c
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Gao, Feng, and Zhongyun Fan. "Effect of Nucleant Particle Agglomeration on Grain Size." Metallurgical and Materials Transactions A 53, no. 3 (2022): 810–22. http://dx.doi.org/10.1007/s11661-021-06549-2.

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AbstractSolute accumulation/depletion in the liquid around a growing solid particle during the solidification of metallic melts creates a constitutionally supercooled (CS) zone that has a significant effect on the final solidified grain structure. In this paper, we introduce two mechanisms related to the CS zone that affect grain size: one is the grain initiation free zone (GIFZ) that describes the inability of nucleant particles located in the CS zone for grain initiation and the other is re-melting (RM) of solid particles due to overlap of CS zones. Based on these two mechanisms, we have sys
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Dissertations / Theses on the topic "Solid particle accumulation"

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Tóth, Balázs. "Two-phase flow investigation in a cold-gas solid rocket motor model through the study of the slag accumulation process." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210575.

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The present research project is carried out at the von Karman Institute for Fluid Dynamics (Rhode-Saint-Genèse, Belgium) with the financial support of the European Space Agency.<p><p>The first stage of spacecrafts (e.g. Ariane 5, Vega, Shuttle) generally consists of large solid propellant rocket motors (SRM), which often consist of segmented structure and incorporate a submerged nozzle. During the combustion, the regression of the solid propellant surrounding the nozzle integration part leads to the formation of a cavity around the nozzle lip. The propellant combustion generates liquefied alum
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Book chapters on the topic "Solid particle accumulation"

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Umamaheswari, Appavoo, Ayarivan Puratchikody, Sakthivel Lakshmana Prabu, and Rathinasabapathy Thirumurugan. "Advanced Strategy and Future Perspectives in Drug Delivery System." In Dosage Forms - Emerging Trends and Prospective Drug-Delivery Systems [Working Title]. IntechOpen, 2025. https://doi.org/10.5772/intechopen.1008498.

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One of the main issues with the drug delivery system is delivering the drug to specific target site with anticipated concentration to produce a desired therapeutic potential of the drug. The major drawbacks in the conventional dosage forms are lack of targeted drug delivery, selectivity, non-specific distribution, poor bioavailability, frequent dosage regimen, side effects, first-pass metabolism, solubility for poorly soluble drugs, inability to cross biological barriers, gastrointestinal irritation, drug interaction, and effectiveness. Recent advancements in molecular pharmacology and the dru
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Brezonik, Patrick L., and William A. Arnold. "Surface Chemistry and Sorption." In Water Chemistry, 2nd ed. Oxford University PressNew York, 2022. http://dx.doi.org/10.1093/oso/9780197604700.003.0012.

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Abstract This chapter focuses on how surfaces on suspended particles, nanoparticles, and sediments affect solute behavior and concentrations. The molecular structures of solids that yield various kinds of surfaces and interfaces are described, along with features of surfaces themselves. Forces that attract/repel solutes to/from surfaces are described with emphasis on electrical charge and excess surface energy, called surface tension. A major focus is on sorption, i.e., the accumulation of solutes onto surfaces. The Freundlich and Langmuir models that quantify this process are described along
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Valyaev, A. N. "THE ENERGY ACCUMULATION IN SOLIDS IRRADIATED BY HIGH POWER BEAMS OP CHARGED PARTICLES." In EPM ’89: 3rd International Conference on Energy Pulse and Particle Beam Modification of Materials, September 4.–8. 1989, Dresden, GDR. De Gruyter, 1989. http://dx.doi.org/10.1515/9783112575666-154.

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Golubev, I. A., and O. I. Ivanova. "Characteristics of Suspended Sediment Runoff in the Arable Land of the Northern Forest-Steppe of Central Siberia." In Advances in Transdisciplinary Engineering. IOS Press, 2024. https://doi.org/10.3233/atde241051.

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The study of erosion-accumulative processes on agricultural lands is of great importance for further combating their consequences in the form of degradation, thinning of the valuable humus horizon of soils and loss of soil fertility. The problem is complicated by the small number of direct field studies of soil flushing during snowmelt. The physical meaning of the processes of water erosion lies in the processes of separation, transportation and re-deposition of soil particles in the form of suspended and entrained sediments in a microrail network on the soil surface (trickle washouts). This a
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Babasaheb, Jige Sandipan. "CHEMICAL CONTAMINANTS OF ENVIRONMENT AND ITS EFFECT ON HEALTH." In Futuristic Trends in Chemical, Material Sciences & Nano Technology Volume 2 Book 12. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2023. http://dx.doi.org/10.58532/v2bs12p2ch3.

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The chemical has wide range in the environment which has contaminate our earth’s land, water and air. This chemical also shows impact environment and human health. Among this containments many comes from the industry and commercial area like roads, parking, oil and chemical spills and storm drains like non point sources. The waste water treatment plants and sewage system also produces chemical containments in the environment. In the ecosystem food chain some containment entered by breakdown and accumulating. The containment accumulated by fish or any other wildlife has been eaten by human and
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H. Leeds, Brice. "On the Feasibility of the Closed Cycle Local Economy Based on Pyrolysis." In Recent Perspectives in Pyrolysis Research. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.100230.

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Modern technologies allow much higher rate of prosperity than normally seen around the globe. The development can be achieved based on the local resources. Pyrolysis should play the central role on the initial stage of the processing of the biomass. The practical experience made by the development engineers allow to make solid conclusion about the current problems faced during the introduction of the technology. The introduction of pyrolysis technologies, especially in developing countries, faces non-engineering problems. The assessment of the economic viability of the introduced technological
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He, Jibin, Yujun Zhao, Jianyue Feng, Wei Xie, and Xiaojie Li. "Experimental Study on Permeability Damage Induced by Multi-Cycle Alternative Injection and Production in Porous Sandstone Geothermal Reservoirs." In Advances in Transdisciplinary Engineering. IOS Press, 2024. https://doi.org/10.3233/atde241142.

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For the mid-to-deep porous sandstone geothermal reservoirs, where geothermal pressures are relatively high and artificial recharge-induced blockage is severe, the accumulation of particulate materials can easily lead to a reduction in reservoir permeability, also known as permeability damage. Most of the deep porous geothermal fields have experienced internal blockage in their recharge wells, eventually resulting in their decommissioning. This paper conducts a series of indoor simulations of recharge displacement in geothermal wells targeting sandstone reservoirs with different porosities usin
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Conference papers on the topic "Solid particle accumulation"

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Garcia, Alfonso, Trevor Place, and Fabio Rodriguez Corredor. "Applicability of the Shields Number for Prediction of Particle Movements in Oil Transmission Pipelines." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-10996.

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Abstract Corrosive conditions can develop where pipeline sediments accumulate in crude transmission pipelines. The accumulation of sediment at pipeline over bends occurs when inertial forces in the pipe flow cause a thickening in the boundary layer at the pipe floor, which decreases the shear stresses responsible of mobilizing solids. The Shields method has been proposed to predict the accumulation of solid particles taking into account the critical role that shear stress plays in transportation of solids. The Shields method was originally developed as a river model, a simple dimensionless dia
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Manayil Santhosh, Balagopal, Ali Anwar, and Marcello Lappa. "On the Various Numerical Methods for the Simulation and Validation of Thermovibrationally-Driven Solid Particle Accumulation Phenomena in Microgravity Conditions." In 52nd IAF Student Conference, Held at the 75th International Astronautical Congress (IAC 2024). International Astronautical Federation (IAF), 2024. https://doi.org/10.52202/078379-0012.

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Diep, Daniel V. "Chemical Treatment Additives to Minimize High-Temperature Corrosion and Deposits in Liquid and Solid-Fired Boilers." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88137.

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Abstract Fuel impurities such as sulfur, alkalies (Na, K), vanadium, and chlorine can play an important role in the formation of liquid phase deposits and are considered the main sources of fireside corrosion. Liquid phase deposits not only promote the accumulation of fly ash particles on heat transfer surfaces, but also provide electrolytes for electrochemical attack of metal tubes. Many efforts have been made to minimize or control deposits and corrosion. These include boiler and burner designs, combustion control, fuel selection, mechanical cleaning using highly resistant alloys, and applyi
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Teh, Lay Seong, Faisal M. Al-Abbas, Nayef M. Al-Anazi, and Qasim Saleem. "Novel Hybrid Model for under Deposit Corrosion Risk Assessment of Crude Pipeline in Sand Producing Field." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17744.

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Abstract Oil and gas production pipelines are susceptible to internal corrosion at locations where flow conditions promote water accumulation and solid particles settlement (precipitation). These deposits form diffusion barrier between the produced fluids and underlying substrate, which results in water chemistry near the steel surface different from that in the bulk fluids. This can potentially lead to an accelerated localized corrosion through under deposit corrosion (UDC). Successful corrosion management of UDC is based on risk assessment, mitigation and monitoring. As a normal practice, me
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Al-Mithin, Abdul Wahab, Shabbir Safri, Surya Prakash, Patrick Teevens, Zhenjin Zhu, and Ashish Khera. "Liquid Petroleum - Internal Corrosion Direct Assessment (LP-ICDA) of a “Piggable” Kuwaiti Crude Oil Pipeline Using NACE International SP0208-2008." In CORROSION 2012. NACE International, 2012. https://doi.org/10.5006/c2012-01268.

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Abstract This paper describes an Internal Corrosion Direct Assessment (ICDA) protocol carried out for a “piggable” Kuwaiti crude oil pipeline in compliance with NACE SP0208-2008. A 914.4 mm (36 in) × 25 km pipeline (CR088) transports Ratawi/Burgan crude oil a distance of 25 kilometers. It consists of three pipeline regions as defined within SP0208-2008 (with two of the three pipeline regions containing three pipeline subregions), where the three regions were operated with a different flow rate and/or pipeline diameter and BS&amp;W amount under two discrete time eras. The pipeline was commissio
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Palencsár, Attila, and Conchita Mendez. "Under Deposit Corrosion Testing under Inhibited and pH-stabilized Conditions." In CORROSION 2020. NACE International, 2020. https://doi.org/10.5006/c2020-14941.

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Abstract The risk of under deposit corrosion (UDC) in oil and gas pipelines where accumulation of solids can be expected is of key importance when CO2 corrosion mitigation strategies are assessed and qualified. In this work the authors present the results of a laboratory study aimed at evaluating the susceptibility for UDC when using either corrosion inhibitor (CI) or pH stabilization under field-relevant conditions, including a basic assessment of inhibitor adsorption on sand. The tests were performed at ambient pressure in jacketed glass cells with a specially designed specimen holder and li
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Xiao, Yumin, R. S. Amano, Timin Cai, Jiang Li, and Guoqiang He. "Particle Tracking in Combustion Chamber of Solid Rocket Motor." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/cie-21760.

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Abstract It has been a challenge to investigate how to trace particles in a solid rocket motor (SRM) using aluminized composite solid propellant and submerged nozzle. In using CFD simulations, the boundary conditions for the ejecting particles constrain their trajectories, hence these affect the two-phase flow calculations, and thus significantly affect the evaluation of the slag accumulation. The RTR (X-ray Real-time Radiography) technique is a new method to detect the particles in a firing SRM. A method was developed to simulate the particle ejection from the propellant surface. The moving t
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Muttenthaler, Lukas, and Bernhard Manhartsgruber. "Prediction of Particle Resuspension and Particle Accumulation in Hydraulic Reservoirs Using Three-Phase CFD Simulations." In ASME/BATH 2019 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/fpmc2019-1617.

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Abstract The reduction of hydraulic oil contamination in gaseous (air), liquid (water) and solid (particles) form is highly relevant for hydraulic systems. It minimizes machine downtime, avoids technical failures, and reduces wear of mechanical components and fluid degradation. Particle and water separation are achieved by hydraulic filters. The separation of air bubbles must be undertaken by the reservoir, furthermore the reservoir can support the separation of (free) water and particles. In this paper, stationary results over a wide range of oil flow rates were determined using Eulerian CFD
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Purwandari, Sartika D., Bjørnar Lund, and Sigve Hovda. "Physic Based Approach for Solid Transport in Deviated and Horizontal Well." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-78532.

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Abstract Cuttings transport is one significant challenge during drilling especially in high deviated and horizontal wellbores. At high degree of inclination, cutting particles may settle to the low side of the wellbore. Below a threshold flow rate, the fluid forces on a particle at the wall will be insufficient to re-entrain the particle and a moving bed of particles will accumulate. The removal of cuttings bed could be difficult once it is formed. Cuttings bed accumulation can create operational problems with respect to drill time and drill cost. Therefore, a good strategy is needed to combin
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Ahmadi, Goodarz, Hojjat Nasr, and John B. McLaughlin. "Direct Numerical Simulation of Four Way-Coupled Gas-Solid Flow and Deposition in a Turbulent Channel Flow." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78249.

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This study was concerned with the effects of particle-particle collisions and two-way coupling on the dispersed and carrier phase turbulence fluctuations in a channel flow. The time history of the instantaneous turbulent velocity vector was generated by the two-way coupled direct numerical simulation (DNS) of the Navier-Stokes equation via a pseudospectral method. The particle equation of motion included the drag and the shear induced lift forces. The effect of particles on the flow was included in the analysis via a feedback force that acted on the computational grid points. Several simulatio
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Reports on the topic "Solid particle accumulation"

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Svedeman. L51729 Gas Scrubber Performance Evaluation - Measurement Methods. Pipeline Research Council International, Inc. (PRCI), 1995. http://dx.doi.org/10.55274/r0010420.

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Scrubbers and separators are used in natural gas pipelines to remove solid and liquid materials from the gas stream. Failure to remove the entrained materials from the gas can result in equipment damage, increased pressure drop due to liquid accumulation, flow measurement errors, and corrosion. The performance of separators is rarely tested after a separator is installed because there is a lack of test instrumentation and it is difficult to conduct tests at the high pressures. The only indicators of poor separator performance are recurring problems in downstream equipment or the detection of a
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