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Journal articles on the topic 'Physics. Sub-grid Physics'

Author: Grafiati

Published: 22 February 2023

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1

Algoso, Anne Kurtz, Georgia Richardson, and Peter Woods. "Sub-grid Numerical Techniques for First Principles Physics Based Tools." Procedia Engineering 58 (2013): 433–44. http://dx.doi.org/10.1016/j.proeng.2013.05.050.

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2

Gibson, B. K., K. Pilkington, C. B. Brook, G. S. Stinson, and J. Bailin. "Constraining sub-grid physics with high-redshift spatially-resolved metallicity distributions." Astronomy & Astrophysics 554 (June 2013): A47. http://dx.doi.org/10.1051/0004-6361/201321239.

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3

Negri, A., and M. Volonteri. "Black hole feeding and feedback: the physics inside the ‘sub-grid’." Monthly Notices of the Royal Astronomical Society 467, no. 3 (2017): 3475–92. http://dx.doi.org/10.1093/mnras/stx362.

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Nuñez-Castiñeyra, A., E. Nezri, J. Devriendt, and R. Teyssier. "Cosmological simulations of the same spiral galaxy: the impact of baryonic physics." Monthly Notices of the Royal Astronomical Society 501, no. 1 (2020): 62–77. http://dx.doi.org/10.1093/mnras/staa3233.

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ABSTRACT The interplay of star formation (SF) and supernova (SN) feedback in galaxy formation is a key element for understanding galaxy evolution. Since these processes occur at small scales, it is necessary to have sub-grid models that recover their evolution and environmental effects at the scales reached by cosmological simulations. In this work, we present the results of the Mochima simulation, where we simulate the same spiral galaxy inhabiting a Milky Way (MW) size halo in a cosmological environment changing the sub-grid models for SN feedback and SF. We test combinations of the Schmidt

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Bing Deng, Xiao, and Siwei Dong. "Sub-Grid modelling based on vorticity-stretching." Journal of Physics: Conference Series 1522 (April 2020): 012021. http://dx.doi.org/10.1088/1742-6596/1522/1/012021.

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Shutts, Glenn, Thomas Allen, and Judith Berner. "Stochastic parametrization of multiscale processes using a dual-grid approach." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 366, no. 1875 (2008): 2623–39. http://dx.doi.org/10.1098/rsta.2008.0035.

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Some speculative proposals are made for extending current stochastic sub-gridscale parametrization methods using the techniques adopted from the field of computer graphics and flow visualization. The idea is to emulate sub-filter-scale physical process organization and time evolution on a fine grid and couple the implied coarse-grained tendencies with a forecast model. A two-way interaction is envisaged so that fine-grid physics (e.g. deep convective clouds) responds to forecast model fields. The fine-grid model may be as simple as a two-dimensional cellular automaton or as computationally dem

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WU, CHUI-JIE, and HUI GUAN. "LATTICE BOLTZMANN DYNAMICS AND DYNAMICAL SYSTEM SUB-GRID MODELS." Modern Physics Letters B 23, no. 03 (2009): 349–52. http://dx.doi.org/10.1142/s0217984909018370.

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The dynamics sub-grid scale (SGS) models and the dynamical system SGS model are introduced into the lattice Boltzmann method (LBM), and applied to numerical simulation of turbulent cavity flows. The results are compared with those of direct numerical simulation of turbulence and Smagorinsky SGS model. A new average method of eliminating the inherent unphysical oscillation of LBM is also given.

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Labarre, V., B. Dubrulle, and D. Paillard. "Sub-grid modelling for a diffusive lattice gas." Journal of Physics A: Mathematical and Theoretical 53, no. 40 (2020): 405006. http://dx.doi.org/10.1088/1751-8121/aba577.

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Sun, Mengxue, Ruixin Gao, Yuhui Ji, Xin Long, Changzhi Yao, and Fan Wu. "Inside-wind-farm/Wind-farm-grid sub-synchronous oscillation characteristics analysis in grid-connected system of multiple DFIGs." Journal of Physics: Conference Series 2076, no. 1 (2021): 012116. http://dx.doi.org/10.1088/1742-6596/2076/1/012116.

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Abstract Aiming at the sub-synchronous oscillation (SSO) problem of the grid-connected system of multiple DFIGs, most of the existing theoretical studies take the entire wind farm as a single-machine model, the stand-alone model cannot reflect the inside-wind-farm oscillation mode produced by the interactions among DFIGs in the wind farm. Therefore, this paper takes the equivalent value of DFIG-based wind farm to three DFIGs, establishes a mathematical model of the grid-connected system of three DFIGs, and studies the sub-synchronous oscillation modes existing in the system through eigenvalue

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Oliva, G. André, and R. Kuiper. "Modeling disk fragmentation and multiplicity in massive star formation." Astronomy & Astrophysics 644 (November 27, 2020): A41. http://dx.doi.org/10.1051/0004-6361/202038103.

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Context. There is growing evidence that massive stars grow by disk accretion in a similar way to their low-mass counterparts. Early in evolution, these disks can achieve masses that are comparable to the current stellar mass, and therefore the forming disks are highly susceptible to gravitational fragmentation. Aims. We investigate the formation and early evolution of an accretion disk around a forming massive protostar, focussing on its fragmentation physics. To this end, we follow the collapse of a molecular cloud of gas and dust, the formation of a massive protostar, the formation of its ci

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Ghaisas, Niranjan S., Dinesh A. Shetty, and Steven H. Frankel. "Large eddy simulation of thermal driven cavity: Evaluation of sub-grid scale models and flow physics." International Journal of Heat and Mass Transfer 56, no. 1-2 (2013): 606–24. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.09.055.

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12

Pastor-Serrano, Oscar, and Zoltán Perkó. "Learning the Physics of Particle Transport via Transformers." Proceedings of the AAAI Conference on Artificial Intelligence 36, no. 11 (2022): 12071–79. http://dx.doi.org/10.1609/aaai.v36i11.21466.

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Particle physics simulations are the cornerstone of nuclear engineering applications. Among them radiotherapy (RT) is crucial for society, with 50% of cancer patients receiving radiation treatments. For the most precise targeting of tumors, next generation RT treatments aim for real-time correction during radiation delivery, necessitating particle transport algorithms that yield precise dose distributions in sub-second times even in highly heterogeneous patient geometries. This is infeasible with currently available, purely physics based simulations. In this study, we present a data-driven dos

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13

Wright, Ruby J., Claudia del P. Lagos, Chris Power, and Peter D. Mitchell. "The impact of stellar and AGN feedback on halo-scale baryonic and dark matter accretion in the eagle simulations." Monthly Notices of the Royal Astronomical Society 498, no. 2 (2020): 1668–92. http://dx.doi.org/10.1093/mnras/staa2359.

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ABSTRACT We use the eagle suite of hydrodynamical simulations to analyse accretion rates (and the breakdown of their constituent channels) on to haloes over cosmic time, comparing the behaviour of baryons and dark matter (DM). We also investigate the influence of sub-grid baryon physics on halo-scale inflow, specifically the consequences of modelling radiative cooling, as well as feedback from stars and active galactic nuclei (AGNs). We find that variations in halo baryon fractions at fixed mass (particularly their circumgalactic medium gas content) are very well correlated with variations in

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14

CHEN, ZHIHUA, XIAOHANG JIANG, and JUNLI HANG. "LARGE EDDY SIMULATION OF A 3D CHANNEL FLOW WITH WALL-MOUNTED RECTANGULAR CYLINDERS." Modern Physics Letters B 23, no. 03 (2009): 301–4. http://dx.doi.org/10.1142/s0217984909018254.

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Large eddy simulation was applied to simulate the compressible flow past multiple wall-mounted rectangular cylinders in a channel flow. The dynamic sub-grid stress model was employed to approximate the sub-grid scale effects. For flow past single wall-mounted cylinder, our calculated results agree well with the results of both previous experimental and numerical results which showed the formation and diffusion of vortexes around the cylinder. Flow past two wall-mounted cylinders has also been simulated numerically and our numerical results disclosed the formation of the vortex street behind th

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15

Gallerano, F., E. Pasero, and G. Cannata. "A dynamic two-equation Sub Grid Scale model." Continuum Mechanics and Thermodynamics 17, no. 2 (2005): 101–23. http://dx.doi.org/10.1007/s00161-004-0190-4.

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Bappy, Mehedi H., Pablo M. Carrica, Jiajia Li, et al. "A sub-grid scale cavitation inception model." Physics of Fluids 34, no. 3 (2022): 033308. http://dx.doi.org/10.1063/5.0079313.

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Unresolved pressure fluctuations at the sub-grid scale (SGS) level of large eddy simulation (LES) or Reynolds-averaged Navier–Stokes computations affect cavitation inception predictions, as SGS low pressures are simply ignored. We present a framework to take the unresolved SGS flow into account. Representing the SGS flow as canonical turbulence, in this paper, homogeneous isotropic turbulence (HIT), the pressure fluctuations, and transport and cavitating behavior of nuclei in such turbulence can be evaluated from direct numerical simulations (DNS) and used to create a model of cavitation incep

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17

Jung, Jiwon, Moo-Young Lee, Jae-Gu Hwang, et al. "Low-energy electron beam generation in inductively coupled plasma via a DC biased grid." Plasma Sources Science and Technology 31, no. 2 (2022): 025002. http://dx.doi.org/10.1088/1361-6595/ac43c2.

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Abstract Low-energy electron beam generation using a DC biased grid was investigated in an inductively coupled plasma (ICP). The electron beam was measured in argon gas at various pressures, ICP source powers, and substrate voltages (V sub). At a low ICP source power (50 W), an electron beam was generated even at small values of V sub (10 V), however at a high ICP source power (200 W), an electron beam was only generated when a higher voltage (30 V) was applied due to the short sheath thickness on the grid surface. The sheath on the grid surface is an important factor for generating electron b

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18

Bernard, Florian, Angelo Iollo, and Gabriella Puppo. "A Local Velocity Grid Approach for BGK Equation." Communications in Computational Physics 16, no. 4 (2014): 956–82. http://dx.doi.org/10.4208/cicp.291013.240314a.

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AbstractThe solution of complex rarefied flows with the BGK equation and the Discrete Velocity Method (DVM) requires a large number of velocity grid points leading to significant computational costs. We propose an adaptive velocity grid approach exploiting the fact that locally in space, the distribution function is supported only by a sub-set of the global velocity grid. The velocity grid is adapted thanks to criteria based on local temperature, velocity and on the enforcement of mass conservation. Simulations in 1D and 2D are presented for different Knudsen numbers and compared to a global v

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19

SONG, KEE-NAM, SANG-HOON LEE, and SOO-BUM LEE. "IMPACT ANALYSIS AND TEST FOR THE SPACER GRID ASSEMBLY OF A NUCLEAR FUEL ASSEMBLY." International Journal of Modern Physics B 22, no. 09n11 (2008): 1228–34. http://dx.doi.org/10.1142/s021797920804658x.

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A spacer grid assembly is one of the main structural components of the nuclear fuel assembly for a Pressurized light Water Reactor (PWR). The spacer grid assembly supports and aligns the fuel rods, guides the fuel assemblies past each other during a handling and, if needed, sustains lateral seismic loads. The ability of a spacer grid assembly to resist these lateral loads is usually characterized in terms of its dynamic and static crush strengths, which are acquired from tests. In this study, a finite element analysis on the dynamic crush strength of spacer grid assembly specimens is carried o

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20

Liang, Weili, and Jiguang Wu. "Research on additional damping control of sub-synchronous oscillation in series-compensated DFIG system." Journal of Physics: Conference Series 2087, no. 1 (2021): 012053. http://dx.doi.org/10.1088/1742-6596/2087/1/012053.

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Abstract Since series-compensated grid-connected system of doubly fed induction generator (DFIG) may cause sub-synchronous oscillation, with the purpose of improving the system stability, in this paper, the mechanism of sub-synchronous oscillation (SSO) is analyzed from the perspective of system damping, according to the mechanism, an additional damping controller is designed to suppress SSO. The controller uses rotor speed as the input signal and adds it into the d-axis current inner loop of the grid-side converter through filtering and proportional amplification, with the purpose of providin

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21

Navarro-Martinez, Salvador, Giovanni Tretola, Mohammad Reza Yosri, Robert L. Gordon, and Konstantina Vogiatzaki. "An investigation on the impact of small-scale models in gasoline direct injection sprays (ECN Spray G)." International Journal of Engine Research 21, no. 1 (2019): 217–25. http://dx.doi.org/10.1177/1468087419889449.

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The work presents a numerical investigation of gasoline direct injection and the resulting early development of spray plumes from an eight-hole injector (Engine Combustion Network Spray G). The objective is to evaluate the impact on the droplet size distribution (DSD) statistics from the assumed model physics, particularly for the small scales. Two modelling approaches are compared: Eulerian–Lagrangian spray atomisation with adaptive mesh refinement and a stochastic fields transported probability density function method. The two models simulate the small scales and sub-grid droplet physics wit

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22

Akinlabi, Emmanuel O., Marta Wacławczyk, Szymon P. Malinowski, and Juan Pedro Mellado. "Fractal Reconstruction of Sub-Grid Scales for Large Eddy Simulation." Flow, Turbulence and Combustion 103, no. 2 (2019): 293–322. http://dx.doi.org/10.1007/s10494-019-00030-2.

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23

Borrow, Josh, Matthieu Schaller, Richard G. Bower, and Joop Schaye. "Sphenix: smoothed particle hydrodynamics for the next generation of galaxy formation simulations." Monthly Notices of the Royal Astronomical Society 511, no. 2 (2021): 2367–89. http://dx.doi.org/10.1093/mnras/stab3166.

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ABSTRACT Smoothed particle hydrodynamics (SPH) is a ubiquitous numerical method for solving the fluid equations, and is prized for its conservation properties, natural adaptivity, and simplicity. We introduce the Sphenix SPH scheme, which was designed with three key goals in mind: to work well with sub-grid physics modules that inject energy, be highly computationally efficient (both in terms of compute and memory), and to be Lagrangian. sphenix uses a Density-Energy equation of motion, along with a variable artificial viscosity and conduction, including limiters designed to work with common s

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24

Owens, Mathew J., Pete Riley, and Tim Horbury. "The Role of Empirical Space-Weather Models (in a World of Physics-Based Numerical Simulations)." Proceedings of the International Astronomical Union 13, S335 (2017): 254–57. http://dx.doi.org/10.1017/s1743921317007128.

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AbstractAdvanced forecasting of space weather requires prediction of near-Earth solar-wind conditions on the basis of remote solar observations. This is typically achieved using numerical magnetohydrodynamic models initiated by photospheric magnetic field observations. The accuracy of such forecasts is being continually improved through better numerics, better determination of the boundary conditions and better representation of the underlying physical processes. Thus it is not unreasonable to conclude that simple, empirical solar-wind forecasts have been rendered obsolete. However, empirical

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25

Wang, B., A. Kronenburg, and O. T. Stein. "Modelling Sub-Grid Passive Scalar Statistics in Moderately Dense Evaporating Sprays." Flow, Turbulence and Combustion 103, no. 2 (2019): 519–35. http://dx.doi.org/10.1007/s10494-019-00024-0.

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26

Lin, Peifeng, Pu Wang, Yong Zhou, and Xiaojun Li. "Numerical simulation of rotating channel flow based on a modified DES model." Modern Physics Letters B 35, no. 11 (2021): 2150193. http://dx.doi.org/10.1142/s0217984921501931.

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A new type of nonlinear sub-grid scale (SGS) model is adopted based on the helicity analysis and is verified by predicting the internal flow in a rotating channel. A stress term that contains helicity constraint is introduced into the original SGS model to construct a nonlinear sub-grid model. This additional term representing the helicity constraint effect in the momentum equations is shown to give predictions that are in better agreement with the experimental data. In this paper, the Detached-Eddy Simulation (DES) and the nonlinear SGS model are used to further study the turbulence statistic

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27

Maulik, Romit, Omer San, Jamey D. Jacob, and Christopher Crick. "Sub-grid scale model classification and blending through deep learning." Journal of Fluid Mechanics 870 (May 14, 2019): 784–812. http://dx.doi.org/10.1017/jfm.2019.254.

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In this article we detail the use of machine learning for spatio-temporally dynamic turbulence model classification and hybridization for large eddy simulations (LES) of turbulence. Our predictive framework is devised around the determination of local conditional probabilities for turbulence models that have varying underlying hypotheses. As a first deployment of this learning, we classify a point on our computational grid as that which requires the functional hypothesis, the structural hypothesis or no modelling at all. This ensures that the appropriate model is specified froma prioriknowledg

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28

Tang, Qili, Min Hou, Yajie Xiao, and Lina Yin. "Two-Level Finite Element Iterative Algorithm Based on Stabilized Method for the Stationary Incompressible Magnetohydrodynamics." Entropy 24, no. 10 (2022): 1426. http://dx.doi.org/10.3390/e24101426.

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In this paper, based on the stabilization technique, the Oseen iterative method and the two-level finite element algorithm are combined to numerically solve the stationary incompressible magnetohydrodynamic (MHD) equations. For the low regularity of the magnetic field, when dealing with the magnetic field sub-problem, the Lagrange multiplier technique is used. The stabilized method is applied to approximate the flow field sub-problem to circumvent the inf-sup condition restrictions. One- and two-level stabilized finite element algorithms are presented, and their stability and convergence analy

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29

Colín, Pedro, Vladimir Avila-Reese, Enrique Vázquez-Semadeni, Octavio Valenzuela, and Daniel Ceverino. "LOW-MASS GALAXY FORMATION IN COSMOLOGICAL ADAPTIVE MESH REFINEMENT SIMULATIONS: THE EFFECTS OF VARYING THE SUB-GRID PHYSICS PARAMETERS." Astrophysical Journal 713, no. 1 (2010): 535–51. http://dx.doi.org/10.1088/0004-637x/713/1/535.

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30

Chaurase, Payal, and Pankaj Ramtekkar. "A new design of control & power management strategies of hybrid ac-dc microgrids toward high power quality." Journal of Physics: Conference Series 2089, no. 1 (2021): 012036. http://dx.doi.org/10.1088/1742-6596/2089/1/012036.

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Abstract The micro grid idea provides for the lack of several reversing switches to unitary AC-DC grid that enables connection and charges (loads) to the electrical systems with changeable regenerative AC and CC sources. Safe operation and gadget safety involve digital integration with utilities/grid through power converters. Enhanced client reliability, decreased input losses, local voltages are supported, and waste heat efficiency increased, voltage drop or interruptible supply of electricity can be customized to satisfy their unique customer demands. Work at present Analyses the performance

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31

Williams, R. J. R. "Sub-grid properties and artificial viscous stresses in staggered-mesh schemes." Journal of Computational Physics 374 (December 2018): 413–43. http://dx.doi.org/10.1016/j.jcp.2018.07.012.

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32

Akinlabi, Emmanuel O., Marta Wacławczyk, and Szymon P. Malinowski. "Fractal reconstruction of sub-grid scales for large eddy simulation of atmospheric turbulence." Journal of Physics: Conference Series 1101 (October 2018): 012001. http://dx.doi.org/10.1088/1742-6596/1101/1/012001.

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33

Yao, S., B. Wang, A. Kronenburg, and O. T. Stein. "Modeling of sub-grid conditional mixing statistics in turbulent sprays using machine learning methods." Physics of Fluids 32, no. 11 (2020): 115124. http://dx.doi.org/10.1063/5.0027524.

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34

SUN, MING BO, XUE SONG BAI, WEI DONG LIU, JIAN HAN LIANG, and ZHEN GUO WANG. "A MODIFIED SUB-CELL-FIX METHOD FOR RE-INITIALIZATION OF LEVEL-SET DISTANCE FUNCTION AND ITS DEPENDENCE TESTS ON GRID STRETCHING." Modern Physics Letters B 24, no. 15 (2010): 1615–29. http://dx.doi.org/10.1142/s0217984910024018.

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The sub-cell-fix (SCF) method proposed by Russo and Smereka3 computes the distance function of the cells adjacent to the zero level-set without disturbing the original zero level-set. A modified sub-cell-fix scheme independent of local curvature is developed in this paper, which makes use of a combination of the points adjacent to zero level-set surfaces and preserves the interface in a second-order accuracy. The new sub-cell-fix scheme is capable of handling large local curvature, and as a result it demonstrates satisfactory performance on several challenging test cases. The limitations of th

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35

Colín, Pedro, Vladimir Avila-Reese, and Octavio Valenzuela. "Cosmological simulations of low-mass galaxies: some potential issues." Proceedings of the International Astronomical Union 6, S270 (2010): 503–6. http://dx.doi.org/10.1017/s1743921311000883.

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AbstractCosmological Adaptive Mesh Refinement simulations are used to study the specific star formation rate (sSFR=SSF/Ms) history and the stellar mass fraction, fs=Ms/MT, of small galaxies, total masses MT between few × 1010 M⊙ to few ×1011 M⊙. Our results are compared with recent observational inferences that show the so-called “downsizing in sSFR” phenomenon: the less massive the galaxy, the higher on average is its sSFR, a trend seen at least since z ~ 1. The simulations are not able to reproduce this phenomenon, in particular the high inferred values of sSFR, as well as the low values of

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36

Borrow, Josh, Matthieu Schaller, and Richard G. Bower. "Inconsistencies arising from the coupling of galaxy formation sub-grid models to pressure-smoothed particle hydrodynamics." Monthly Notices of the Royal Astronomical Society 505, no. 2 (2021): 2316–27. http://dx.doi.org/10.1093/mnras/stab1423.

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ABSTRACT Smoothed particle hydrodynamics (SPH) is a Lagrangian method for solving the fluid equations that is commonplace in astrophysics, prized for its natural adaptivity and stability. The choice of variable to smooth in SPH has been the topic of contention, with smoothed pressure (P-SPH) being introduced to reduce errors at contact discontinuities relative to smoothed density schemes. Smoothed pressure schemes produce excellent results in isolated hydrodynamics tests; in more complex situations however, especially when coupling to the ‘sub-grid’ physics and multiple time-stepping used in m

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Smith, Robin S., Steve George, and Jonathan M. Gregory. "FAMOUS version xotzt (FAMOUS-ice): a general circulation model (GCM) capable of energy- and water-conserving coupling to an ice sheet model." Geoscientific Model Development 14, no. 9 (2021): 5769–87. http://dx.doi.org/10.5194/gmd-14-5769-2021.

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Abstract. The physical interactions between ice sheets and their surroundings are major factors in determining the state of the climate system, yet many current Earth system models omit them entirely or approximate them in a heavily parameterised manner. In this work we have improved the snow and ice sheet surface physics in the FAMOUS climate model, with the aim of improving the representation of polar climate and implementing a bidirectional coupling to the Glimmer dynamic ice sheet model using the water and energy fluxes calculated by FAMOUS. FAMOUS and Glimmer are both low-resolution, comp

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OHNO, Tomoki, Akira T. NODA, and Masaki SATOH. "Impacts of Sub-grid Ice Cloud Physics in a Turbulence Scheme on High Clouds and their Response to Global Warming." Journal of the Meteorological Society of Japan. Ser. II 98, no. 5 (2020): 1069–81. http://dx.doi.org/10.2151/jmsj.2020-054.

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Rahimi, Awat, and Daisuke Kawata. "Towards a self-consistent numerical model of late-type galaxies: calibrating the effects of sub-grid physics on galactic models." Monthly Notices of the Royal Astronomical Society 422, no. 3 (2012): 2609–19. http://dx.doi.org/10.1111/j.1365-2966.2012.20821.x.

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40

Prat, Alvaro, Theophile Sautory, and S. Navarro-Martinez. "A Priori Sub-grid Modelling Using Artificial Neural Networks." International Journal of Computational Fluid Dynamics 34, no. 6 (2020): 397–417. http://dx.doi.org/10.1080/10618562.2020.1789116.

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Lopes, Pedro, Jorge Leandro, and Rita F. Carvalho. "Self-Aeration Modelling Using a Sub-Grid Volume-Of-Fluid Model." International Journal of Nonlinear Sciences and Numerical Simulation 18, no. 7-8 (2017): 559–74. http://dx.doi.org/10.1515/ijnsns-2017-0015.

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AbstractThe accurate prediction of self-aerated flow is not always easy to obtain, particularly if the computational performance is the main concern. Two-fluid formulation is suitable to simulate the dispersed air in a continuous water phase (e.g. bubbly flows) in a fine mesh, whereas the interface tracking methods are used for sharp interfaces with two continuous and contiguous phases (e.g. free-surface flows). Several approaches have emerged to combine both methods; however all found a gap in the transition between resolved and unresolved scales of air at the interface. Including a source te

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Hageman, Tim, and René de Borst. "Sub-grid models for multiphase fluid flow inside fractures in poroelastic media." Journal of Computational Physics 414 (August 2020): 109481. http://dx.doi.org/10.1016/j.jcp.2020.109481.

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Agertz, Oscar, Andrew Pontzen, Justin I. Read, et al. "EDGE: the mass–metallicity relation as a critical test of galaxy formation physics." Monthly Notices of the Royal Astronomical Society 491, no. 2 (2019): 1656–72. http://dx.doi.org/10.1093/mnras/stz3053.

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ABSTRACT We introduce the ‘Engineering Dwarfs at Galaxy Formation’s Edge’ (EDGE) project to study the cosmological formation and evolution of the smallest galaxies in the Universe. In this first paper, we explore the effects of resolution and sub-grid physics on a single low-mass halo ($M_{\rm halo}=10^{9}{\, \rm M}_\odot$), simulated to redshift z = 0 at a mass and spatial resolution of $\sim 20{\, \rm M}_\odot$ and ∼3 pc. We consider different star formation prescriptions, supernova feedback strengths, and on-the-fly radiative transfer (RT). We show that RT changes the mode of galactic self-

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Miura, H., F. Hamba, and A. Ito. "Two-fluid sub-grid-scale viscosity in nonlinear simulation of ballooning modes in a heliotron device." Nuclear Fusion 57, no. 7 (2017): 076034. http://dx.doi.org/10.1088/1741-4326/aa6ebd.

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Roy, Utpal N., Giuseppe S. Camarda, Yonggang Cui, and Ralph B. James. "Advances in CdZnTeSe for Radiation Detector Applications." Radiation 1, no. 2 (2021): 123–30. http://dx.doi.org/10.3390/radiation1020011.

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Detection of X- and gamma-rays is essential to a wide range of applications from medical imaging to high energy physics, astronomy, and homeland security. Cadmium zinc telluride (CZT) is the most widely used material for room-temperature detector applications and has been fulfilling the requirements for growing detection demands over the last three decades. However, CZT still suffers from the presence of a high density of performance-limiting defects, such as sub-grain boundary networks and Te inclusions. Cadmium zinc telluride selenide (CZTS) is an emerging material with compelling properties

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46

Bhimireddy, Sudheer, and Kiran Bhaganagar. "Performance Assessment of Dynamic Downscaling of WRF to Simulate Convective Conditions during Sagebrush Phase 1 Tracer Experiments." Atmosphere 9, no. 12 (2018): 505. http://dx.doi.org/10.3390/atmos9120505.

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Large-Eddy Simulations (LES) corresponding to four convective intensive observation periods of Sagebrush Phase 1 tracer experiment were conducted with realistic boundary conditions using Weather Research and Forecast model (WRF). Multiple nested domains were used to dynamically downscale the conditions from domain with grid size of 24 km to local scales with grid size of 150 m. Sensitivity analysis of mesoscale model was conducted using three boundary layer, three surface layer and two micro-physics schemes. Model performance was evaluated by comparing the surface meteorological variables and

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Borges, Rafael, and Fabio Ramos. "Sub-grid effects of the Voigt viscoelastic regularization of a singular dyadic model of turbulence." Journal of Physics A: Mathematical and Theoretical 46, no. 19 (2013): 195501. http://dx.doi.org/10.1088/1751-8113/46/19/195501.

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Arshad, Salman, Bo Kong, Alan Kerstein, and Michael Oevermann. "A strategy for large-scale scalar advection in large eddy simulations that use the linear eddy sub-grid mixing model." International Journal of Numerical Methods for Heat & Fluid Flow 28, no. 10 (2018): 2463–79. http://dx.doi.org/10.1108/hff-09-2017-0387.

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PurposeThe purpose of this numerical work is to present and test a new approach for large-scale scalar advection (splicing) in large eddy simulations (LES) that use the linear eddy sub-grid mixing model (LEM) called the LES-LEM.Design/methodology/approachThe new splicing strategy is based on an ordered flux of spliced LEM segments. The principle is that low-flux segments have less momentum than high-flux segments and, therefore, are displaced less than high-flux segments. This strategy affects the order of both inflowing and outflowing LEM segments of an LES cell. The new splicing approach is

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Cai, Kangbei, Guangyuan Huang, Yuchen Song, Junlian Yin, and Dezhong Wang. "A sub-grid scale model developed for the hexahedral grid to simulate the mass transfer between gas and liquid." International Journal of Heat and Mass Transfer 181 (December 2021): 121864. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2021.121864.

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Yang, Jing, Yong Sun, Ladier Fa, Shuhan Zhang, Zhihao Wang, and Limin Mei. "Mechanism and Mitigation Strategy of Sub-synchronous Oscillation Caused by Grid-connected DFIG with Series Compensation." Journal of Physics: Conference Series 2125, no. 1 (2021): 012009. http://dx.doi.org/10.1088/1742-6596/2125/1/012009.

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Abstract Power systems are at risk of sub-synchronous oscillation (SSO) when connecting doubly-fed induction generator (DFIG)-based wind turbines to transmission lines with series compensation. This paper focuses on the mechanism and mitigation strategy of SSO. Firstly, the mechanism of SSO is studied from two aspects: induction generator effect (IGE) and sub-synchronous control interaction (SSCI). An equivalent circuit is developed to illustrate the negative resistance effect. Based on the result of the analysis, the SSO mitigation strategy using notch filter and virtual resistance control is

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