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Journal articles on the topic 'Phenomenological Velocity'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Zekry, Abdelhalim. "Phenomenological parameters of the spreading velocity in thyristors." Archiv für Elektrotechnik 75, no. 5 (1992): 351–57. http://dx.doi.org/10.1007/bf01576105.

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2

Maruejouls, T., P. A. Vanrolleghem, G. Pelletier, and P. Lessard. "A phenomenological retention tank model using settling velocity distributions." Water Research 46, no. 20 (2012): 6857–67. http://dx.doi.org/10.1016/j.watres.2011.11.067.

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3

Song, TaeKwon, and SangMo Yang. "Phenomenological Calculation of the Domain-size-dependentFerroelectric Domain-wall Velocity." Journal of the Korean Physical Society 55, no. 2 (2009): 618–21. http://dx.doi.org/10.3938/jkps.55.618.

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4

Lee, Chul-Hee, and Andreas A. Polycarpou. "A phenomenological friction model of tripod constant velocity (CV) joints." Tribology International 43, no. 4 (2010): 844–58. http://dx.doi.org/10.1016/j.triboint.2009.12.004.

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5

Dorovskii, V. N., and Yu V. Perepechko. "Phenomenological description of two-velocity media with relaxing tangential stresses." Journal of Applied Mechanics and Technical Physics 33, no. 3 (1992): 403–9. http://dx.doi.org/10.1007/bf00851737.

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6

Vil’chinskiĭ, S. I., and P. I. Fomin. "Phenomenological relativistic theory of superfluidity for systems with two types of condensates." Low Temperature Physics 21, no. 7 (1995): 566–69. https://doi.org/10.1063/10.0033844.

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Equations are derived phenomenologically for the relativistic theory of superfluidity with two types of condensates in the nondissipative approximation. Three-velocity relativistic thermodynamics and hydrodynamics are deduced from the conditions of consistency of the conservation laws for energy–momentum, generalized charge, and entropy with the superfluid velocity equations.

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7

Skakauskas, Vladas, Pranas Katauskis, Remigijus Šimkus, and Feliksas Ivanauskas. "Phenomenological model of bacterial aerotaxis with a negative feedback." Nonlinear Analysis: Modelling and Control 18, no. 2 (2013): 227–49. http://dx.doi.org/10.15388/na.18.2.14024.

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A phenomenological model for the suspension of the aerotactic swimming microorganisms placed in a chamber with its upper surface open to air is presented. The model was constructed to embody some complexity of the aerotaxis phenomenon, especially, changes in the average bacteria drift velocity under changing environmental conditions. It was assumed that effective forces applied to the cell (gravitational, drag, and thrust) should be essential for the overall system dynamics; and that bacterial propulsion force, but not their swimming velocity, is proportional to the gradient of the oxygen conc

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8

Rand, Omri. "Technical Note: A Phenomenological Modification for Glauert's Classical Induced Velocity Equation." Journal of the American Helicopter Society 51, no. 3 (2006): 279. http://dx.doi.org/10.4050/1.3092889.

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9

Kinzelin, E., and D. Hubert. "Ion velocity distribution function in the upper auroralFregion: 1. Phenomenological approach." Journal of Geophysical Research 97, A4 (1992): 4061. http://dx.doi.org/10.1029/91ja02830.

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10

Standnes, Dag Chun. "A phenomenological description of the transient single-phase pore velocity period using the resistance force-velocity relationship." Advances in Geo-Energy Research 6, no. 2 (2022): 104–10. http://dx.doi.org/10.46690/ager.2022.02.03.

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11

Yushchenko, O. V., and D. S. Trotskaya. "The Phenomenological Description of Plastic Flow in Solids." Journal of Solid State Physics 2013 (September 17, 2013): 1–6. http://dx.doi.org/10.1155/2013/604714.

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In the framework of the phenomenological scheme a self-consistent description of the transition from the solid state to the plastic flow was presented taking into account the point defects such as interstitials and vacancies. On the basis of the system of synergistic equations the dependencies of the internal stresses and curvature of the velocity profile of the shear displacement on the order parameter as well as the stationary distribution of the concentration of vacancies were found.

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12

Bresee, Randall R., and Wen-Chien Ko. "Fiber Formation during Melt Blowing." International Nonwovens Journal os-12, no. 2 (2003): 1558925003os—12. http://dx.doi.org/10.1177/1558925003os-1200209.

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Experimental measurements are presented to provide phenomenological insight into the commercial melt blowing process. In particular, we discuss the following experimental measurements obtained at various die-collector locations: fiber diameter, fiber velocity, air velocity, fiber acceleration, fiber entanglement, fiber temperature, birefringence, wide-angle x-ray diffraction and small-angle x-ray scattering. Our discussion focuses on how these measurements provide insight into fiber formation during melt blowing.

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13

Ciudad, Aleix, and J. M. Sancho. "A unified phenomenological analysis of the experimental velocity curves in molecular motors." Journal of Chemical Physics 128, no. 22 (2008): 225107. http://dx.doi.org/10.1063/1.2937452.

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14

Chevillard, Laurent, Bernard Castaing, Alain Arneodo, Emmanuel Lévêque, Jean-François Pinton, and Stéphane G. Roux. "A phenomenological theory of Eulerian and Lagrangian velocity fluctuations in turbulent flows." Comptes Rendus Physique 13, no. 9-10 (2012): 899–928. http://dx.doi.org/10.1016/j.crhy.2012.09.002.

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15

CAPOZZIELLO, SALVATORE, SALVATORE DE MARTINO, SILVIO DE SIENA, and FABRIZIO ILLUMINATI. "MECHANISMS OF AGGREGATION OF PHYSICAL SYSTEMS: POSSIBLE UNIVERSAL LAWS." International Journal of Modern Physics B 18, no. 04n05 (2004): 541–48. http://dx.doi.org/10.1142/s021797920402415x.

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In this paper we deduce, by general hypotheses, phenomenological relations which allow to compute in order of magnitude, but with sensible accuracy, the sizes of all the observed astrophysical and cosmological structures in terms of two microscopic quantities (the radius and the mass of a nucleon), and of two fundamental constants (the gravitational constant and the velocity of the light). Moreover, we show that similar phenomenological relations could rule the mechanisms of aggregations of a large class of physical systems.

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16

Tlili, Sham, Estelle Gauquelin, Brigitte Li, et al. "Collective cell migration without proliferation: density determines cell velocity and wave velocity." Royal Society Open Science 5, no. 5 (2018): 172421. http://dx.doi.org/10.1098/rsos.172421.

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Collective cell migration contributes to embryogenesis, wound healing and tumour metastasis. Cell monolayer migration experiments help in understanding what determines the movement of cells far from the leading edge. Inhibiting cell proliferation limits cell density increase and prevents jamming; we observe long-duration migration and quantify space–time characteristics of the velocity profile over large length scales and time scales. Velocity waves propagate backwards and their frequency depends only on cell density at the moving front. Both cell average velocity and wave velocity increase li

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17

Ga, Bui Van, Phung Xuan Tho, Nhan Hong Quang, and Nguyen Huu Huong. "Phenomenological model for determining velocity field of LPG jet in combustion chamber of direct injection S.I. engine." Vietnam Journal of Mechanics 26, no. 2 (2004): 83–92. http://dx.doi.org/10.15625/0866-7136/26/2/5692.

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A phenomenological model has been established to predict the velocity distribution of LPG (Liquefied Petroleum Gas) jet in combustion chamber of spark ignition (SI) engine. A shaped coefficient \(\beta\) governing the similarity of velocity profiles of LPG jets has been defined based on the theoretical and experimental analyses of turbulent diffusion jets. The results show that \(\beta\) is constant for steady jet but it is not the case for unsteady one. The model will enable us to calculate the velocity profiles of LPG jet after ending injection. This is necessary for research of stratified c

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18

Ignatenko, Evgenii, and Yuliya Bryanskaya. "Velocity distribution in a turbulent flow." E3S Web of Conferences 263 (2021): 04047. http://dx.doi.org/10.1051/e3sconf/202126304047.

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The article considers the issue of velocity distribution in a turbulent flow. The logarithmic velocity profile obtained on the basis of semiempirical theory of turbulence by L. Prandtl is given. A comparison of the calculations of the velocity distribution for various dependencies with the measurement data is performed. It is shown that the calculated dependencies show discrepancy with each other and experimental data. The study of the hydraulic characteristics of water flows is required to solve problems of water supply and water disposal, engineering problems of hydraulic construction, regul

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19

Zocher, Marvin A., and Tariq D. Aslam. "Numerical Considerations in the Modeling of a High Explosive Cylinder Experiment Using an ALE Continuum Mechanics Code." Materials 13, no. 19 (2020): 4448. http://dx.doi.org/10.3390/ma13194448.

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A series of experiments involving the detonation of PBX 9501 encased in a copper cylinder are modeled with the objective of evaluating a proposed set of phenomenological parameters for the Wescott–Stewart–Davis reactive burn model. The numerical analysis is conducted using the Los Alamos continuum mechanics code FLAG. Numerical considerations pertaining to various aspects of modeling the experiments using FLAG are discussed. It is shown that use of the proposed set of phenomenological parameters results in predictions of free-surface velocity that match empirically measured velocities reasonab

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20

Alatas, Husin, Dyo D. Prayuda, Achmad Syafiuddin, May Parlindungan, Nurjaman O. Suhendra, and Hidayat Pawitan. "Simple Model for Simulating Characteristics of River Flow Velocity in Large Scale." International Journal of Geophysics 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/520893.

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We propose a simple computer based phenomenological model to simulate the characteristics of river flow velocity in large scale. We use shuttle radar tomography mission based digital elevation model in grid form to define the terrain of catchment area. The model relies on mass-momentum conservation law and modified equation of motion of falling body in inclined plane. We assume inelastic collision occurs at every junction of two river branches to describe the dynamics of merged flow velocity.

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21

Biasi, Niccoló, and Alessandro Tognetti. "A computationally efficient dynamic model of human epicardial tissue." PLOS ONE 16, no. 10 (2021): e0259066. http://dx.doi.org/10.1371/journal.pone.0259066.

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We present a new phenomenological model of human ventricular epicardial cells and we test its reentry dynamics. The model is derived from the Rogers-McCulloch formulation of the FitzHugh-Nagumo equations and represents the total ionic current divided into three contributions corresponding to the excitatory, recovery and transient outward currents. Our model reproduces the main characteristics of human epicardial tissue, including action potential amplitude and morphology, upstroke velocity, and action potential duration and conduction velocity restitution curves. The reentry dynamics is stable

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22

Higuchi, R., T. Okabe, A. Yoshimura, and T. E. Tay. "Progressive failure under high-velocity impact on composite laminates: Experiment and phenomenological mesomodeling." Engineering Fracture Mechanics 178 (June 2017): 346–61. http://dx.doi.org/10.1016/j.engfracmech.2017.03.019.

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23

Liu, Zhao Cun, and Wei Jia Fan. "Approach to some Properties near the Wall of Parallel to Wall Shear Flow." Applied Mechanics and Materials 197 (September 2012): 396–400. http://dx.doi.org/10.4028/www.scientific.net/amm.197.396.

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From the viewpoint of vortex dynamics, the flowing properties and the characters of transition from laminar flow to turbulent flow were analyzed, the concept of the Reynolds number was reviewed and studied. The different form of the Reynolds number was presented to relate it with fluctuating and breaking down processes to show its dynamical mechanism. On the basis of phenomenological properties, the velocity distribution near the wall was studied to show that the profile connects with the flowing structure which is different from the linear form what usually considered to be, thus the velocity

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24

Schuler, Gerhard A. "Quarkonium Production: Velocity-Scaling Rules and Long-Distance Matrix Elements." International Journal of Modern Physics A 12, no. 22 (1997): 3951–63. http://dx.doi.org/10.1142/s0217751x97002103.

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The hierarchy of long-distance matrix elements (MEs) for quarkonium production depends on their scaling with the velocity v of the heavy quark in the bound state. Ranges for the velocities in various bound states and uncertainties of colour-singlet MEs are estimated in a quark-potential model. Different possibilities for the scaling with v of the MEs are discussed; they depend on the actual values of v and the QCD scale. As an application, J/ψ polarization in e+e- annihilation is discussed. The first non-perturbative estimates of colour-octet MEs are presented and compared with phenomenologica

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25

Peeters, J. W. R. "Modelling turbulent heat transfer in rough channels using phenomenological theory." Journal of Physics: Conference Series 2116, no. 1 (2021): 012025. http://dx.doi.org/10.1088/1742-6596/2116/1/012025.

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Abstract Rough walls are often encountered in industrial heat transfer equipment. Even though it is well known that a rough wall affects velocity fields and thermal fields differently (and therefore also skin friction factors and Stanton or Nusselt numbers), predicting the effect of rough walls on turbulent heat transfer remains difficult. A relation between the scalar spectrum and the Stanton number is derived for channels with both smooth and rough walls. It is shown that the new relation agrees reasonably well with recent DNS experiments for wall roughness sizes of k + < 150 and when Pr

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26

Guglielmi, A. V., and A. S. Potapov. "Note on the dependence of Pc3-4 activity on the solar wind velocity." Annales Geophysicae 12, no. 12 (1994): 1192–96. http://dx.doi.org/10.1007/s00585-994-1192-z.

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Abstract. Various models that describe the dependence of pulsation amplitude A on the solar wind velocity V are discussed. Phenomenological considerations and experimental data count in favour of a model of the form A/A0=(V/V0) exp (-V0/V). The linear model A=a+bV which is common in the literature gives negative values of amplitude as V->0, which is strange from the physical point of view. The possibility of modifying the linear model by including critical phenomena is discussed.

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27

Zhu, Zhi Gang, Zhi Liang Wang, and Yong Chi Li. "Experimental and Numerical Investigation into Dynamic Spall Damage of Porous Phenolic Composites." Advanced Materials Research 160-162 (November 2010): 106–12. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.106.

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A damage evolution law for porous phenolic composites is developed by using phenomenological point, which along with the improved Johnson-Cook model is then implemented into a finite difference code for one-dimensional strain wave problem. The velocity history of free-face particle is recorded and correlated with the simulated result to evaluate the damage parameters. Good agreement shows that the proposed damage evolution law and spall rule are feasible. Besides, the relationships between the striking velocity of flyer and the spall thickness as well as spall time are investigated. This study

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28

Danielewski, Marek, and Bartek Wierzba. "Bi-Velocity Method and Linear Nonreversible Thermodynamics, Interdiffusion in R2." Defect and Diffusion Forum 297-301 (April 2010): 1461–68. http://dx.doi.org/10.4028/www.scientific.net/ddf.297-301.1461.

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Kirkendall and Darken findings of the drift velocity since 1948 have stimulated progress in transport phenomenological models. The convection velocity (the Darken drift in solids), , and velocity of diffusion, , require definition and the method how the diffusion displacement is defined, computed and measured. The equation of volume continuity allowed the extension of the Darken method and avoids the rigid assumption of the constant molar concentration. In this work, we use the bi-velocity approach, i.e., the generalized Darken method, to model interdiffusion in two-dimensional diffusion multi

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29

ALISEDA, A., A. CARTELLIER, F. HAINAUX, and J. C. LASHERAS. "Effect of preferential concentration on the settling velocity of heavy particles in homogeneous isotropic turbulence." Journal of Fluid Mechanics 468 (October 8, 2002): 77–105. http://dx.doi.org/10.1017/s0022112002001593.

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The behaviour of heavy particles in isotropic, homogeneous, decaying turbulence has been experimentally studied. The settling velocity of the particles has been found to be much larger than in a quiescent fluid. It has been determined that the enhancement of the settling velocity depends on the particle loading, increasing as the volume fraction of particles in the flow increases. The spatial and temporal distribution of the particle concentration field is shown to exhibit large inhomogeneities. As the particles interact with the underlying turbulence they concentrate preferentially in certain

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30

Raineri, Fernando O., and Ernesto O. Timmermann. "Velocity correlation functions in different reference frames. Their relation with phenomenological and empirical transport coefficients." Journal of the Chemical Society, Faraday Transactions 2 82, no. 9 (1986): 1339. http://dx.doi.org/10.1039/f29868201339.

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31

Zhang, Zhi Yong, Cai Xia Huang, Xin Liu, and Xiang Hong Wang. "A Novel Simplified and High-Precision Inverse Dynamics Model for Magneto-Rheological Damper." Applied Mechanics and Materials 117-119 (October 2011): 273–78. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.273.

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Due to the virtue in energy consumption, response time and work reliability, the magneto-rheological (MR) damper is a new promising devices for vibration control, in which the controller input expected control force and piston velocity to justify MR damper input voltage, so that desired damper force is achieved. It follows that the functional relationship between input voltage, expected control force and piston velocity is important for MR damper application. In this paper, a novel simplified and high-precision inverse dynamics model is derived based on MR damper Bouc-Wen phenomenological mode

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32

SIMJI, P., and VISHNU M. BANNUR. "PHENOMENOLOGICAL MODELS OF GLUON PLASMA IN THE LARGE TEMPERATURE RANGE." International Journal of Modern Physics A 28, no. 25 (2013): 1350121. http://dx.doi.org/10.1142/s0217751x13501212.

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Quasiparticle quark–gluon plasma (qQGP) model and strongly coupled quark–gluon plasma (SCQGP) are two different phenomenological models of quark–gluon plasma (QGP) that try to explain the nonideal behavior seen in lattice simulation of QCD and in relativistic heavy ion collisions. These models almost successfully explain the existing lattice data up to 5Tc. Here, we investigate how better these models fit the recent lattice data results of precision SU(3) thermodynamics for a large temperature range (up to 1000Tc) by studying the statistical mechanics and thermodynamics of gluon plasma and hen

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33

Roque-Bernard, Amande, Antoine Lucas, Eric Gayer, Pascal Allemand, Céline Dessert, and Eric Lajeunesse. "Phenomenological model of suspended sediment transport in a small catchment." Earth Surface Dynamics 11, no. 3 (2023): 363–81. http://dx.doi.org/10.5194/esurf-11-363-2023.

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Abstract. We develop a phenomenological model of suspended sediment transport on the basis of data acquired in the Capesterre river, which drains a small tropical catchment in Guadeloupe. The model correctly represents the concentration of suspended sediment during floods, provided that the relation between concentration and water level forms a counterclockwise loop. In the model, the properties of the sediment and of the river are all lumped into four parameters: a settling velocity related to the size of the suspended sediment, a threshold water level which acts as a proxy for the threshold

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34

Balakin, Alexander, and Gleb Kiselev. "Spontaneous Color Polarization as A Modus Originis of the Dynamic Aether." Universe 6, no. 7 (2020): 95. http://dx.doi.org/10.3390/universe6070095.

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We suggest the phenomenological model of emergence of the dynamic aether as a result of decay of the SU(N) symmetric field configuration containing the multiplet of vector fields. The scenario of the transition to the dynamic aether, which is characterized by one unit timelike vector field that is associated with the aether velocity, is based on the idea of spontaneous color polarization analogous to the spontaneous electric polarization in ferroelectric materials. The mechanism of spontaneous color polarization is described in the framework of anisotropic cosmological model of the Bianchi-I t

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35

Hanford, A. J., and D. E. Wilson. "The Effect of a Turbulent Wake on the Stagnation Point: Part II—Heat Transfer Results." Journal of Turbomachinery 116, no. 1 (1994): 46–56. http://dx.doi.org/10.1115/1.2928277.

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A phenomenological model is proposed that relates the effect of free-stream turbulence to the increase in stagnation point heat transfer. The model requires both turbulence intensity and energy spectra as inputs to the unsteady velocity at the edge of the boundary layer. The form of the edge velocity contains both a pulsation of the incoming flow and an oscillation of the streamlines. The incompressible unsteady and time-averaged boundary layer response is determined by solving the momentum and energy equations. The model allows for arbitrary two-dimensional geometry; however, results are give

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36

TAKEUCHI, YOSHIHIRO, YUICHI TAZAKI, S. Y. TSAI, and TAKASHI YAMAZAKI. "WAVE PACKET APPROACH TO THE EQUAL-ENERGY/MOMENTUM/VELOCITY PRESCRIPTIONS OF NEUTRINO OSCILLATION." Modern Physics Letters A 14, no. 33 (1999): 2329–39. http://dx.doi.org/10.1142/s0217732399002418.

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Neutrino oscillation is discussed with emphasis placed more on its conceptual aspects. After reviewing the two conventional formulations, referred to as the equal-energy prescription and the equal-momentum prescription, wave packet treatments are developed for each of these two prescriptions. Both wave packets localized in space and those localized in time are considered, and, by invoking relativistic kinematics as well, the necessary conditions for oscillation to occur are derived, which appear to have a form more well-defined and quantitative than what have been noted before. Some phenomenol

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37

Liu, Long, Yan Peng, Xiuzhen Ma, Naoto Horibe, and Takuji Ishiyama. "Phenomenological modeling of diesel spray with varying injection profile." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 11 (2018): 2780–90. http://dx.doi.org/10.1177/0954407018807021.

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Accurate and quick prediction of spray characteristics such as spray penetration is paramount for the understanding and quantitative analysis of the combustion process in diesel engines, in order to perform parametric study on advanced combustion process in diesel engines, zero-dimensional diesel spray model is often used for the prediction of the spray evolution. In this study, a previous zero-dimensional diesel spray model applied for the spray penetration prediction including the part after the end of injection with a constant injection rate was extended to the cases with varying injection

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38

Aguilar Domínguez, Pedro Pablo, Fátima Reyes López, María A. Contreras Vera, et al. "Development and Validation of a Phenomenological Model for Scalable Size-Exclusion Chromatography in TNF-Blocking Peptide Purification." Bionatura Journal 2, no. 2 (2025): 1–19. https://doi.org/10.70099/bj/2025.02.02.2.

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A recombinant peptide as a TNF-blocking agent was obtained using fermentation in E. coli. The strategy was based on the expression of a multimeric tandem protein comprising 15 repeated copies of the r-CBB288 peptide, and the monomeric unit was released with a hydroxylamine-assisted proteolysis step. At this point, size exclusion chromatography was used to separate the monomer unit from unreacted polymer forms. Therefore, the main theme of this study was to develop a phenomenological General Rate Model to describe the elution profile of SEC and to ensure the required purity levels for the menti

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39

Harutyunyan, Arus, and Armen Sedrakian. "Phenomenological Relativistic Second-Order Hydrodynamics for Multiflavor Fluids." Symmetry 15, no. 2 (2023): 494. http://dx.doi.org/10.3390/sym15020494.

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In this work, we perform a phenomenological derivation of the first- and second-order relativistic hydrodynamics of dissipative fluids. To set the stage, we start with a review of the ideal relativistic hydrodynamics from energy–momentum and particle number conservation equations. We then go on to discuss the matching conditions to local thermodynamical equilibrium, symmetries of the energy–momentum tensor, decomposition of dissipative processes according to their Lorentz structure, and, finally, the definition of the fluid velocity in the Landau and Eckart frames. With this preparatory work,

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40

ROIG, V., and A. LARUE DE TOURNEMINE. "Measurement of interstitial velocity of homogeneous bubbly flows at low to moderate void fraction." Journal of Fluid Mechanics 572 (January 23, 2007): 87–110. http://dx.doi.org/10.1017/s0022112006003600.

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We develop a new methodology to examine the conditional and unconditional vertical velocity induced by high-Reynolds-number bubbles rising in a uniform flow, at low to moderate void fraction α (up to 15%). These statistics provide a local description of the perturbation of the liquid velocity around a test bubble in the swarm. In particular, the attenuation of the length of the wakes with increasing void fraction is measured for a large range of void fraction. The strong attenuation of the wakes is related to wake intermingling mechanisms. The methodology also enables a definition of the inter

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41

Rauter, Matthias, Jan-Thomas Fischer, Wolfgang Fellin, and Andreas Kofler. "Snow avalanche friction relation based on extended kinetic theory." Natural Hazards and Earth System Sciences 16, no. 11 (2016): 2325–45. http://dx.doi.org/10.5194/nhess-16-2325-2016.

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Abstract. Rheological models for granular materials play an important role in the numerical simulation of dry dense snow avalanches. This article describes the application of a physically based model from the field of kinetic theory to snow avalanche simulations. The fundamental structure of the so-called extended kinetic theory is outlined and the decisive model behavior for avalanches is identified. A simplified relation, covering the basic features of the extended kinetic theory, is developed and implemented into an operational avalanche simulation software. To test the obtained friction re

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42

Wilson, D. E., and A. J. Hanford. "An Unsteady Velocity Formulation for the Edge of the Near-Wall Region." Journal of Turbomachinery 120, no. 2 (1998): 351–61. http://dx.doi.org/10.1115/1.2841413.

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A phenomenological model is presented that relates free-stream turbulence to the augmentation of stagnation-point surface flux quantities. The model requires the turbulence intensity, the longitudinal scale of the turbulence, and the energy spectra as inputs for the unsteady velocity at the edge of the near-wall viscous region. The form of the edge velocity contains both pulsations of the incoming flow and oscillations of the streamline. Incompressible results using a single fluctuating component are presented within the stagnation region of a two-dimensional cylinder. The time-averaged Froess

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43

Potapov, Igor Ivanovich, and Olga Vladimirovna Reshetnikova. "On Modeling the Grain Settling through Viscous Incompressible Fluid Problem using Smoothed Particle Hydrodynamics Method." Proceedings of the Institute for System Programming of the RAS 36, no. 4 (2024): 191–202. http://dx.doi.org/10.15514/ispras-2024-36(4)-15.

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In this paper was formulates the settling velocity determining problem for a single particle. To solve it, an original version of the smoothed particle method (SPH) is proposed where settling particle affects on surrounding fluid particles movement. Herewith the calculation of forces acting on particle (except for inertial forces which takes attached mass effect) is performed according by analytical mechanics formulas for a material point. This mathematical formulation and calculation algorithm was verificated by using open source code «SPH_Lab2d». Dependences for the particle settling velocit

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44

Yan, Fuyong, and Lev Vernik. "Phenomenological models for estimating and constraining c13 for transversely isotropic hydrocarbon source rocks." GEOPHYSICS 86, no. 5 (2021): MR255—MR260. http://dx.doi.org/10.1190/geo2020-0546.1.

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Hydrocarbon source rocks can be adequately approximated as transversely isotropic (TI) media. The elastic properties of a TI medium are defined by five stiffness parameters: [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text]. The laboratory estimation of [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text] is straightforward, with each of the stiffness parameters determined by a single velocity measurement in an orthogonal direction. For [Formula: see text], we need the information of [Formula: see text]

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Corr, David T., Ray Vanderby, and Thomas M. Best. "A Nonlinear Rheological Model for Active and Passive Skeletal Muscle." Journal of Applied Biomechanics 19, no. 3 (2003): 255–63. http://dx.doi.org/10.1123/jab.19.3.255.

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An existing rheological model of skeletal muscle (Forcinito et al., 1998) was modified with a nonlinear Maxwell fluid element to provide a phenomenological model capable of analyzing the strain-stiffening behavior typically found in passive, and occasionally observed in active, skeletal muscle. This new model describes both active and passive muscular behavior as a combination of the behavior of each model component, without requiring prior knowledge of the force-length or force-velocity characteristics of the muscle.

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Li, Haijing, Herman J. H. Clercx, and Federico Toschi. "Lattice Boltzmann method investigation of a reactive electro-kinetic flow in porous media: towards a phenomenological model." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2208 (2021): 20200398. http://dx.doi.org/10.1098/rsta.2020.0398.

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A model based on the Lattice Boltzmann method is developed to study the flow of reactive electro-kinetic fluids in porous media. The momentum, concentration and electric/potential fields are simulated via the Navier–Stokes, advection–diffusion/Nernst–Planck and Poisson equations, respectively. With this model, the total density and velocity fields, the concentration of reactants and reaction products, including neutral and ionized species, the electric potential and the interaction forces between the fields can be studied, and thus we provide an insight into the interplay between chemistry, fl

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Saiko, A. P., and S. A. Markevich. "Phenomenological description of a giant temperature hysteresis of ultrasound velocity and internal friction in lanthanum manganite." Journal of Experimental and Theoretical Physics Letters 78, no. 5 (2003): 332–35. http://dx.doi.org/10.1134/1.1625736.

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Sujar-Garrido, P., M. Becerra, and R. Örlü. "Efficiency assessment of a single surface dielectric barrier discharge plasma actuator with an optimized Suzen–Huang model." Physics of Fluids 34, no. 4 (2022): 047110. http://dx.doi.org/10.1063/5.0087395.

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Spatial and time-resolved characteristics of a single surface dielectric barrier discharge (sDBD) actuator are experimentally and numerically investigated. The paper also focuses on the efficiency of sDBD actuators used as flow-control devices. The motivation is the need for developing a cost-effective way to optimize the balance between control performance and actuator power consumption. The study considers the steady state as often employed in experiments as well as the transient regime. Experimental methods to obtain the active power are revisited, and for the first time, the commonly used

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Bentz, Misty C., Madison Markham, Sara Rosborough, et al. "Velocity-resolved Reverberation Mapping of NGC 3227." Astrophysical Journal 959, no. 1 (2023): 25. http://dx.doi.org/10.3847/1538-4357/ad08b8.

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Abstract We describe the results of a new reverberation mapping program focused on the nearby Seyfert galaxy NGC 3227. Photometric and spectroscopic monitoring was carried out from 2022 December to 2023 June with the Las Cumbres Observatory network of telescopes. We detected time delays in several optical broad emission lines, with Hβ having the longest delay at τ cent = 4.0 − 0.9 + 0.9 days and He ii having the shortest delay with τ cent = 0.9 − 0.8 + 1.1 days. We also detect velocity-resolved behavior of the Hβ emission line, with different line-of-sight velocities corresponding to different

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Mantilla, J. M., D. A. Garzón, and C. H. Galeano. "COMBUSTION MODEL FOR SPARK IGNITION ENGINES OPERATING ON GASOLINE-ETHANOL BLENDS." Revista de Engenharia Térmica 9, no. 1-2 (2010): 89. http://dx.doi.org/10.5380/reterm.v9i1-2.61938.

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This article presents a phenomenological combustion model using turbulent flame propagation theory developed by Keck and coworkers, 1974. The model was adapted to work with gasoline-ethanol blends, following correlations presented by Bayraktar,2005. New sub-models were introduced for intake valve velocity and combustion efficiency. These allow simulating the effect of compression ratio, spark timing and fuel change. Results show good agreement with the ones in the original work as well as with experimental results in a Cooperative Fuels Research (CFR) engine.

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