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Journal articles on the topic 'Flame Particle Tracking'

Author: Grafiati

Published: 6 September 2023

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1

Xie, Qing, Siheng Yang, Hao Cheng, Chi Zhang, and Zhuyin Ren. "Predicting the ignition sequences in a separated stratified swirling spray flame with stochastic flame particle tracking." Journal of the Global Power and Propulsion Society 6 (October 12, 2022): 279–89. http://dx.doi.org/10.33737/jgpps/153495.

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Stochastic flame particle tracking in conjunction with non-reacting combustor simulations can offer insights into the ignition processes and facilitate the combustor optimization. In this study, this approach is employed to simulate the ignition sequences in a separated dual-swirl spray flame, in which the newly proposed pairwise mixing-reaction model is used to account for the mass and energy transfer between the flame particle and the surrounding shell layer. Based on the flame particle temperature, the particle state can be classified in to burnt, hot gas, and extinguished. The additional s

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2

Echekki, T., and M. G. Mungal. "Particle Tracking in a Laminar Premixed Flame." Physics of Fluids A: Fluid Dynamics 2, no. 9 (1990): 1523. http://dx.doi.org/10.1063/1.4738844.

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3

Uranakara, Harshavardhana A., Swetaprovo Chaudhuri, Himanshu L. Dave, Paul G. Arias, and Hong G. Im. "A flame particle tracking analysis of turbulence–chemistry interaction in hydrogen–air premixed flames." Combustion and Flame 163 (January 2016): 220–40. http://dx.doi.org/10.1016/j.combustflame.2015.09.033.

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4

Weber, R., A. A. F. Peters, P. P. Breithaupt, and B. M. Visser. "Mathematical Modeling of Swirling Flames of Pulverized Coal: What Can Combustion Engineers Expect From Modeling?" Journal of Fluids Engineering 117, no. 2 (1995): 289–97. http://dx.doi.org/10.1115/1.2817143.

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The present study is concerned with mathematical modeling of swirling pulverized coal flames. The attention is focused on the near burner zone properties of high-and low-NOx flames issued from an Aerodynamically Air Staged Burner of 3.4 MW thermal input. The swirling combusting flows are calculated using the k–ε model and second-order models of turbulence. The Eulerian balance equations for enthalpy and mass fractions of oxygen, volatiles, carbon monoxide and final combustion products (CO2 + H2O) are solved. The Lagrangian particle tracking is accompanied by appropriate models of coal devolati

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5

XIE, Qing, Zhuyin REN, and Ke WANG. "Modelling ignition probability with pairwise mixing-reaction model for flame particle tracking." Chinese Journal of Aeronautics 34, no. 5 (2021): 523–34. http://dx.doi.org/10.1016/j.cja.2020.12.031.

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6

Lee, K. H., and C. S. Lee. "Effects of tumble and swirl flows on turbulence scale near top dead centre in a four-valve spark ignition engine." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 217, no. 7 (2003): 607–15. http://dx.doi.org/10.1243/095440703322114988.

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The in-cylinder flowfield and the turbulence scale at the ignition timing play an important role in enhancing the propagation speed of the initial flame and the engine combustion. The aim of this work is to investigate the effect of tumble and swirl flows on the turbulence scale near the top dead centre in a four-valve spark ignition (SI) engine by an experimental method. In this study, various flowfields such as tumble and swirl flows were generated by intake flow control valves. For investigation of the flowfields, the single-frame particle tracking velocimeter (PTV) and the twocolour partic

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7

Lewis, G. S., and B. J. Cantwell. "Instantaneous Two-Dimensional Velocity Field Measurements in a Periodic Flame Using Particle Tracking Velocimetry." Physics of Fluids 31, no. 9 (1988): 2388. http://dx.doi.org/10.1063/1.4738823.

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8

Liu, Kan, and David Liu. "Particle tracking velocimetry and flame front detection techniques on commercial aircraft debris striking events." Journal of Visualization 22, no. 4 (2019): 783–94. http://dx.doi.org/10.1007/s12650-019-00571-8.

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9

Rezk, Hegazy, Magdy M. Zaky, Mohemmed Alhaider, and Mohamed A. Tolba. "Robust Fractional MPPT-Based Moth-Flame Optimization Algorithm for Thermoelectric Generation Applications." Energies 15, no. 23 (2022): 8836. http://dx.doi.org/10.3390/en15238836.

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Depending on the temperature difference between the hot and cold sides of the thermoelectric generator (TEG), the output performance of the TEG can be produced. This means that it is necessary to force a TEG based on robust maximum power point tracking (MPPT) to operate close to its MPP at any given temperature or load. In this paper, an improved fractional MPPT (IFMPPT) is proposed in order to increase the amount of energy that can be harvested from TEGs. According to the suggested method, fractional order control is used. A moth-flame optimizer (MFO) was used to determine IFMPPT’s optimal pa

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10

Fuyuto, Takayuki, Yoshiaki Hattori, Hayato Yamashita, Naoki Toda, and Makoto Mashida. "Set-off length reduction by backward flow of hot burned gas surrounding high-pressure diesel spray flame from multi-hole nozzle." International Journal of Engine Research 18, no. 3 (2016): 173–94. http://dx.doi.org/10.1177/1468087416640429.

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The backward flow of the hot burned gas surrounding a diesel flame was found to be one of the factors reducing the set-off length (also called the lift-off length), that is, the distance from a nozzle exit into which a diffusion flame cannot intrude. In the combustion chamber of an actual diesel engine, the entrainment of the surrounding gas into a spray jet injected from a multi-hole nozzle is restricted by the combustion chamber walls and the adjacent spray jets, thus inducing the backward flow of the surrounding gas toward the nozzle exit. The emergence of this backward flow was measured by

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11

Yang, J., S. Kook, K. Kim, and C. Kweon. "In-Flame And In-Cylinder Flow/Turbulence Measurements Near The Glow Plug Using Flame Image Velocimetry And Particle Image Velocimetry In An Optical Compression-Ignition Engine." Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics 20 (July 11, 2022): 1–19. http://dx.doi.org/10.55037/lxlaser.20th.94.

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The present study implements two diagnostic methods based on tracking of seeded olive oil droplets (PIV: particle image velocimetry) and pattern changes detected in high-speed flame movies (FIV: flame image velocimetry) in a small-bore optical diesel engine. For each measurement, a total of 100 engine cycles are recorded and processed to address the inherent cyclic variations. The ensemble-averaged flow fields and turbulence intensity distribution extracted from individual cycles via the spatial filtering method are discussed with a particular interest in the influence of glow plug on flow and

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12

GUO, Chen, Shengli CHANG, Wenjie ZHANG, Guangyi XIAO, Fei WANG, and Tong BAO. "Research on velocity measurement method of rocket engine tail flame particle based on quantum filter and tracking algorithm." Optics and Precision Engineering 31, no. 16 (2023): 2352–61. http://dx.doi.org/10.37188/ope.20233116.2352.

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13

Guerra, Juan F., Ramon Garcia-Hernandez, Miguel A. Llama, and Victor Santibañez. "A Comparative Study of Swarm Intelligence Metaheuristics in UKF-Based Neural Training Applied to the Identification and Control of Robotic Manipulator." Algorithms 16, no. 8 (2023): 393. http://dx.doi.org/10.3390/a16080393.

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This work presents a comprehensive comparative analysis of four prominent swarm intelligence (SI) optimization algorithms: Ant Lion Optimizer (ALO), Bat Algorithm (BA), Grey Wolf Optimizer (GWO), and Moth Flame Optimization (MFO). When compared under the same conditions with other SI algorithms, the Particle Swarm Optimization (PSO) stands out. First, the Unscented Kalman Filter (UKF) parameters to be optimized are selected, and then each SI optimization algorithm is executed within an off-line simulation. Once the UKF initialization parameters P0, Q0, and R0 are obtained, they are applied in

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14

Qin, Dingyi, Qianyun Chen, Jing Li, and Zhaohui Liu. "Effects of Pressure and Coal Rank on the Oxy-Fuel Combustion of Pulverized Coal." Energies 15, no. 1 (2021): 265. http://dx.doi.org/10.3390/en15010265.

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Pressurized oxy-fuel combustion technology is the second generation of oxy-fuel combustion technology and has low energy consumption and low cost. In this research, a visual pressurized flat-flame reaction system was designed. A particle-tracking image pyrometer (PTIP) system based on a high-speed camera and an SLR camera was proposed. Combining the experimental system and data-processing method developed, the ignition and combustion characteristics of a single coal particle between 69 and 133 μm in size were investigated. The results indicated that at atmospheric pressure, the ignition delay

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15

Ma, H., S. Marshall, R. Stevens, and R. Stone. "Full-bore crank-angle resolved imaging of combustion in a four-stroke gasoline direct injection engine." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 221, no. 10 (2007): 1305–20. http://dx.doi.org/10.1243/09544070jauto542.

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The conventional Bowditch piston arrangement in an optical access engine limits the field of view to about half the bore area. By using a transparent crown (with a flat top) and incorporating a concave surface into the underside of the piston, then the piston crown acts as a diverging lens. Appropriate choice of the radius of curvature and the piston crown thickness provides an image of the full bore. There is of course optical distortion in the image but, since the piston position is known for each image, then it is comparatively simple to reconstruct undistorted images and videos. As an illu

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16

Brunel, Marc, Lila Ouldarbi, Alexandre Fahy, and Gaële Perret. "3D-Tracking of Sand Particles in a Wave Flume Using Interferometric Imaging." Optics 3, no. 3 (2022): 254–67. http://dx.doi.org/10.3390/opt3030025.

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We report the 3D-tracking of irregular sand particles in a wave flume using a cylindrical interferometric particle imaging set-up. The longitudinal position of each particle is deduced from the ellipticity of its speckle-like interferometric image. The size of a particle is determined from the analysis of the 2D Fourier transform of its defocused image. It is further possible to identify some rotation of the particles. Simulations accurately confirm the experimental determination of the different parameters (3D position and size of each particle).

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17

Tolpadi, A. K., I. Z. Hu, S. M. Correa, and D. L. Burrus. "Coupled Lagrangian Monte Carlo PDF–CFD Computation of Gas Turbine Combustor Flowfields With Finite-Rate Chemistry." Journal of Engineering for Gas Turbines and Power 119, no. 3 (1997): 519–26. http://dx.doi.org/10.1115/1.2817015.

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A coupled Lagrangian Monte Carlo Probability Density Function (PDF)-Eulerian Computational Fluid Dynamics (CFD) technique is presented for calculating steady three-dimensional turbulent reacting flow in a gas turbine combustor. PDF transport methods model turbulence-combustion interactions more accurately than conventional turbulence models with an assumed shape PDF. The PDF transport equation was solved using a Lagrangian particle tracking Monte Carlo (MC) method. The PDF modeled was over composition only. This MC module has been coupled with CONCERT, which is a fully elliptic three-dimension

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18

Magnuson, Matthew, Terry Stilman, Shannon Serre, et al. "Part 2: Stabilization/Containment of Radiological Particle Contamination to Enhance First Responder, Early Phase Worker, and Public Safety." Applied Sciences 12, no. 8 (2022): 3861. http://dx.doi.org/10.3390/app12083861.

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The application of stabilization technologies to a radiologically contaminated surface has the potential for reducing the spread of contamination and, as a result, decreasing worker exposure to radiation. Three stabilization technologies, calcium chloride (CaCl2), flame retardant Phos-Chek® MVP-Fx, and Soil2OTM were investigated to evaluate their ability to reduce the resuspension and tracking of radiological contamination during response activities such as vehicle and foot traffic. Concrete pavers, asphalt pavers, and sandy soil walking paths were used as test surfaces, along with simulated f

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19

Abidalla, Wisam Abdulabbas, Ahmed Sami Naser, and Mohsin J. Nasir. "Finding of Suitable Transportation Rate Formula by Using "Velocity - Height - Distance" for Bed Material Load." Mathematical Modelling of Engineering Problems 9, no. 2 (2022): 463–67. http://dx.doi.org/10.18280/mmep.090223.

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This research aims to find a suitable transportation rate formula for bed load. Laboratory experiments were conducted in a flume for monitoring and measuring the transportation of sediment particles (bed load) which move by jumping, rolling, or sliding within the flume. This study included two parts. The first part is experimenting using a flume and tracking the particles' movement by analysing the images taken by the camera. The measurements that have been taken are the amount of accumulated bed load particles at the end of the flume, which are distributed along a certain distance during a sp

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20

van den Bremer, T. S., C. Whittaker, R. Calvert, A. Raby, and P. H. Taylor. "Experimental study of particle trajectories below deep-water surface gravity wave groups." Journal of Fluid Mechanics 879 (September 20, 2019): 168–86. http://dx.doi.org/10.1017/jfm.2019.584.

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Owing to the interplay between the forward Stokes drift and the backward wave-induced Eulerian return flow, Lagrangian particles underneath surface gravity wave groups can follow different trajectories depending on their initial depth below the surface. The motion of particles near the free surface is dominated by the waves and their Stokes drift, whereas particles at large depths follow horseshoe-shaped trajectories dominated by the Eulerian return flow. For unidirectional wave groups, a small net displacement in the direction of travel of the group results near the surface, and is accompanie

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21

Alhusban, Zaid, and Manousos Valyrakis. "Assessing and Modelling the Interactions of Instrumented Particles with Bed Surface at Low Transport Conditions." Applied Sciences 11, no. 16 (2021): 7306. http://dx.doi.org/10.3390/app11167306.

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Sediment transport at near threshold to low transport stages (below the continuous transport) can still be affected by flow turbulence and its dynamics can benefit from further comprehensive studies. This study uses an instrumented particle embedded with micro electromechanical sensors (MEMS) to allow tracking the motions and forces acting on it, leading to and during its transport. Instrumented particle transport experiments were carried out at laboratory flume under a range of flow conditions. The probability distributions functions (PDFs) of bed load particle instantaneous velocities, hop d

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22

Wang, Dudou, Hongfu Qiang, and Chao Shi. "A multiphase SPH framework for solving the evaporation and combustion process of droplets." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 3 (2019): 1547–75. http://dx.doi.org/10.1108/hff-08-2019-0666.

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Purpose This paper aims to introduce a two-dimensional smoothed particle hydrodynamics (SPH) framework for simulating the evaporation and combustion process of fuel droplets. Design/methodology/approach To solve the gas–liquid two-phase flow problem, a multiphase SPH method capable of handling high density-ratio problems is established. Based on the Fourier heat conduction equation and Fick’s law of diffusion, the SPH discrete equations are derived. To effectively characterize the phase transition problem, inspired by volume of fluid method, the concept of liquid phase mass fraction of the SPH

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23

Pouransari, H., H. Kolla, J. H. Chen, and A. Mani. "Spectral analysis of energy transfer in turbulent flows laden with heated particles." Journal of Fluid Mechanics 813 (January 27, 2017): 1156–75. http://dx.doi.org/10.1017/jfm.2017.2.

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In this study we consider particle-laden turbulent flows with significant heat transfer between the two phases due to sustained heating of the particle phase. The sustained heat source can be due to particle heating via an external radiation source as in the particle-based solar receivers or an exothermic reaction in the particles. Our objective is to investigate the effects of fluid heating by a dispersed phase on the turbulence evolution. An important feature in such settings is the preferential clustering phenomenon which is responsible for non-uniform distribution of particles in the fluid

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24

OHIWA, Norio, Yojiro ISHINO, Takanori TOMATSU, and Ryuji YAMAKITA. "Magnifying and Tracking Observation of Micro PET Particles Passing through a Plane Premixed Flame Front." Journal of Thermal Science and Technology 2, no. 2 (2007): 212–23. http://dx.doi.org/10.1299/jtst.2.212.

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25

Park, Yong Sung, Philip L. F. Liu, and I.-Chi Chan. "Contact line dynamics and boundary layer flow during reflection of a solitary wave." Journal of Fluid Mechanics 707 (July 13, 2012): 307–30. http://dx.doi.org/10.1017/jfm.2012.280.

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AbstractIn this paper we present a set of wave flume experiments for a solitary wave reflecting off a vertical wall. A particle tracking velocimetry (PTV) technique is used to measure free-surface velocity and the velocity field in the vicinity of the moving contact line. We observe that the free surface undergoes the so-called rolling motion as the contact line moves up and down the vertical wall, and fluid particles on the free surface almost always flow toward the wall except at the end of the reflection process. As the contact line descends along the wall, wall boundary layer flows move in

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26

Krista, Larisza D., and Matthew Chih. "A DEFT Way to Forecast Solar Flares." Astrophysical Journal 922, no. 2 (2021): 218. http://dx.doi.org/10.3847/1538-4357/ac2840.

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Abstract Solar flares have been linked to some of the most significant space weather hazards at Earth. These hazards, including radio blackouts and energetic particle events, can start just minutes after the flare onset. Therefore, it is of great importance to identify and predict flare events. In this paper we introduce the Detection and EUV Flare Tracking (DEFT) tool, which allows us to identify flare signatures and their precursors using high spatial and temporal resolution extreme-ultraviolet (EUV) solar observations. The unique advantage of DEFT is its ability to identify small but signif

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27

Zepeda Mondragon, Hilda, Juan Antonio Garcia Aragon, Humberto Salinas Tapia, and Bommanna G. Krishnappan. "Estimation of Fractal Dimension of Suspended Sediments from Two Mexican Rivers." Water 14, no. 18 (2022): 2774. http://dx.doi.org/10.3390/w14182774.

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Sampling programs for suspended sediment were carried out in the Usumacinta River and its tributary Grijalva River in Mexico during the years 2016 and 2017. Suspended sediment samples collected during these sampling programs were analyzed in the laboratory using a Rotating Annular Flume (RAF) fitted with a Particle Tracking Velocimetry (PTV) to obtain the 2D images of the suspended sediment particles as they were undergoing floc reconstruction, and subsequently using a glass settling column fitted with inline digital holography set up to obtain 3D holograms of the fully flocculated sediment pa

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28

Bartos, Daniel, Matthew Dunn, Mariano Sirignano, Andrea D'Anna, and Assaad R. Masri. "Tracking the evolution of soot particles and precursors in turbulent flames using laser-induced emission." Proceedings of the Combustion Institute 36, no. 2 (2017): 1869–76. http://dx.doi.org/10.1016/j.proci.2016.07.092.

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29

Lin, Yen-Cheng, Hao-Che Ho, Tzu-An Lee, and Hsin-Yu Chen. "Application of Image Technique to Obtain Surface Velocity and Bed Elevation in Open-Channel Flow." Water 14, no. 12 (2022): 1895. http://dx.doi.org/10.3390/w14121895.

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The frequency of droughts and floods is increasing due to the extreme climate. Therefore, water resource planning, allocation, and disaster prevention have become increasingly important. One of the most important kinds of hydrological data in water resources planning and management is discharge. The general way to measure the water depth and discharge is to use the Acoustic Doppler Current Profiler (ADCP), a semi-intrusive instrument. This method would involve many human resources and pose severe hazards by floods and extreme events. In recent years, it has become mainstream to measure hydrolo

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30

Azevedo, Sidney Gomes, Ana Luisa Farias Rocha, Ronald Zico de Aguiar Nunes, et al. "Pulsatile Controlled Release and Stability Evaluation of Polymeric Particles Containing Piper nigrum Essential Oil and Preservatives." Materials 15, no. 15 (2022): 5415. http://dx.doi.org/10.3390/ma15155415.

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Considerable efforts have been spent on environmentally friendly particles for the encapsulation of essential oils. Polymeric particles were developed to encapsulate the essential oil from Piper nigrum based on gelatin and poly–ε–caprolactone (PCL) carriers. Gas Chromatography ((Flame Ionization Detection (GC/FID) and Mass Spectrometry (GC/MS)), Atomic Force Microscopy (AFM), Nanoparticle Tracking Analysis (NTA), Confocal Laser Scanning Microscopy (CLSM), Attenuated Total Reflectance–Fourier-transform Infrared Spectroscopy (ATR–FTIR), and Ultraviolet–Visible (UV–VIS) spectroscopy were used for

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31

Itay, Uri, and Dan Liberzon. "Lagrangian Kinematic Criterion for the Breaking of Shoaling Waves." Journal of Physical Oceanography 47, no. 4 (2017): 827–33. http://dx.doi.org/10.1175/jpo-d-16-0289.1.

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AbstractAn experimental study was conducted with the aim of validating the Lagrangian kinematic criterion (LKC) for the case of breaking of shoaling waves. Monochromatic wave trains were generated in a large wave flume and allowed to shoal and break naturally on an artificial inclination changeable shore, thus allowing inspection of a range of slopes. Instantaneous horizontal Lagrangian water surface velocity was measured by particle tracking velocimetry and compared to the instantaneous propagation speed of the crest on a verge of breaking, the latter calculated using time series produced by

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32

Levenstein, Mark A., Daniel J. Gysbers, Kristen L. Marhaver, et al. "Millimeter-scale topography facilitates coral larval settlement in wave-driven oscillatory flow." PLOS ONE 17, no. 9 (2022): e0274088. http://dx.doi.org/10.1371/journal.pone.0274088.

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Larval settlement in wave-dominated, nearshore environments is the most critical life stage for a vast array of marine invertebrates, yet it is poorly understood and virtually impossible to observe in situ. Using a custom-built flume tank that mimics the oscillatory fluid flow over a shallow coral reef, we isolated the effect of millimeter-scale benthic topography and showed that it increases the settlement of slow-swimming coral larvae by an order of magnitude relative to flat substrates. Particle tracking velocimetry of flow fields revealed that millimeter-scale ridges introduced regions of

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33

Lin, Chang, Ming-Jer Kao, James Yang, Juan-Ming Yuan, and Shih-Chun Hsieh. "Effects of Nonlinearity on Velocity, Acceleration and Pressure Gradient in Free-Stream Zone of Solitary Wave over Horizontal Bed—An Experimental Study." Water 14, no. 22 (2022): 3609. http://dx.doi.org/10.3390/w14223609.

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For solitary waves on a horizontal bed, the study deals experimentally with the high ratio of wave height (H0) to still water depth (h0) that amplifies the wave nonlinearity. The value of H0/h0 tested in a wave flume ranges from 0.050 to 0.550, indicating the shift from a quasi-linear solitary wave to a highly nonlinear one. A high-speed particle image velocimetry (HSPIV) and a flow visualization technique of particle-trajectory tracking method are utilized to measure velocity fields and identify near-bed flow structures. The unsteady free-stream velocities with equal magnitude take place in a

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34

LIBERZON, DAN, and LEV SHEMER. "Experimental study of the initial stages of wind waves' spatial evolution." Journal of Fluid Mechanics 681 (June 24, 2011): 462–98. http://dx.doi.org/10.1017/jfm.2011.208.

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Despite a significant progress and numerous publications over the last few decades a comprehensive understanding of the process of waves' excitation by wind still has not been achieved. The main goal of the present work was to provide as comprehensive as possible set of experimental data that can be quantitatively compared with theoretical models. Measurements at various air flow rates and at numerous fetches were carried out in a small scale, closed-loop, 5 m long wind wave flume. Mean airflow velocity and fluctuations of the static pressure were measured at 38 vertical locations above the me

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Modak, Abhijit, Karthik Puduppakkam, Chitralkumar Naik, and Ellen Meeks. "Simulation of Particle Synthesis by Premixed Laminar Stagnation Flames." MRS Proceedings 1506 (2013). http://dx.doi.org/10.1557/opl.2013.1049.

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ABSTRACTA sectional method for determining particle size distributions has been implemented within the particle tracking module included with CHEMKIN-PRO. The module is available for use with many types of reactor models, ranging from 0-D batch reactors to laminar flame simulations. Coupled with the Burner-stabilized Stagnation Flame (BSSF) Model, the sectional model offers a high-fidelity, robust, and efficient computational framework for simulating flame synthesis of particles in a laminar, premixed stagnation flame environment. The CHEMKIN-PRO coupling allows inclusion of detailed gas-phase

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"Particle tracking in a pre-mixed flame." Physics World 4, no. 1 (1991): 25. http://dx.doi.org/10.1088/2058-7058/4/1/24.

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37

Zirwes, Thorsten, Feichi Zhang, Yiqing Wang, et al. "In-situ flame particle tracking based on barycentric coordinates for studying local flame dynamics in pulsating Bunsen flames." Proceedings of the Combustion Institute, September 2020. http://dx.doi.org/10.1016/j.proci.2020.07.033.

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38

Versailles, Philippe, Antoine Durocher, Gilles Bourque, and Jeffrey M. Bergthorson. "Measurements of the reactivity of premixed, stagnation, methane-air flames at gas turbine relevant pressures." Journal of Engineering for Gas Turbines and Power 141, no. 1 (2018). http://dx.doi.org/10.1115/1.4041125.

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The adiabatic, unstrained, laminar flame speed, SL, is a fundamental combustion property, and a premier target for the development and validation of thermochemical mechanisms. It is one of the leading parameters determining the turbulent flame speed, the flame position in burners and combustors, and the occurrence of transient phenomena, such as flashback and blowout. At pressures relevant to gas turbine engines, SL is generally extracted from the continuous expansion of a spherical reaction front in a combustion bomb. However, independent measurements obtained in different types of apparatuse

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XIE, Qing, Zhuyin REN, Ke WANG, Hongjun LIN, Shoutang SHANG, and Wei XIAO. "A forced ignition probability analysis method using kernel formation analysis with turbulent transport and Lagrangian flame particle tracking." Chinese Journal of Aeronautics, September 2020. http://dx.doi.org/10.1016/j.cja.2020.08.023.

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Cassel, Mathieu, Jérôme Lavé, Alain Recking, Jean-René Malavoi, and Hervé Piégay. "Bedload transport in rivers, size matters but so does shape." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-020-79930-7.

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AbstractBedload transport modelling in rivers takes into account the size and density of pebbles to estimate particle mobility, but does not formally consider particle shape. To address this issue and to compare the relative roles of the density and shape of particles, we performed original sediment transport experiments in an annular flume using molded artificial pebbles equipped with a radio frequency identification tracking system. The particles were designed with four distinct shapes and four different densities while having the same volume, and their speeds and distances traveled under co

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Jiang, Xiao, and Tat Leung Chan. "Lagrangian particle tracking with new weighted fraction Monte Carlo method for studying the soot particle size distributions in premixed flames." International Journal of Numerical Methods for Heat & Fluid Flow ahead-of-print, ahead-of-print (2021). http://dx.doi.org/10.1108/hff-04-2021-0247.

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Purpose The purpose of this paper is to study the soot formation and evolution by using this newly developed Lagrangian particle tracking with weighted fraction Monte Carlo (LPT-WFMC) method. Design/methodology/approach The weighted soot particles are used in this MC framework and is tracked using Lagrangian approach. A detailed soot model based on the LPT-WFMC method is used to study the soot formation and evolution in ethylene laminar premixed flames. Findings The LPT-WFMC method is validated by both experimental and numerical results of the direct simulation Monte Carlo (DSMC) and Multi-Mon

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Ragessi, I. Matias, Carlos Marcelo García, Santiago Marquez Damian, Leticia Tarrab, Antoine Patalano, and Andres Rodriguez. "Detailed experimental and numerical analysis of hydrodynamics in the outflow measurement channel of a sewage treatment plant." Journal of Hydroinformatics, June 15, 2022. http://dx.doi.org/10.2166/hydro.2022.168.

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Abstract The ‘Bajo Grande’ Wastewater Treatment Plant has a design capacity of 2.78 m3/s, and discharges into the Suquia River (Córdoba, Argentina). The river has an average flow rate of 10 m3/s, with lower values during the summer. Currently, the treatment plant does not have an accurate discharge-measurement system prior to the discharge into the river, which makes it difficult to evaluate the dosing of the disinfection treatment. The outflow rate is measured in a straight flume. However, at the inlet section of the flume, a 180° sharp bend induces a complex turbulent flow with instabilities

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Sanjou, Michio, and Yuji Sugihara. "Experimental study on characteristics of turbulence and sediment transport produced by wind-induced water waves." Physics of Fluids, February 2, 2023. http://dx.doi.org/10.1063/5.0138538.

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Many researchers and engineers have shown great interest in mass transfer processes produced by wind-induced waves. Such waves contribute significantly to the transfer of environmental materials such as marine debris and sediment, and the turbulence occurring beneath the waves further complicates wave-induced mass transport. The phase cycle of wave motion is generally considered to be a key determinant of mean flow and turbulence. In aqueous environmental engineering, this relationship is a crucial one to investigate, since turbulence is also related to mass transport. To address this question

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