Results 31 to 40 of about 3,274,048 (287)

Calibration of DEM simulations for dynamic particulate systems

Papers in Physics, 2022
Calibration and validation represent crucial but often-overlooked ingredients in the successful application of discrete element method (DEM) simulations.
Christopher Windows-Yule, Aurelien Neveu
doaj   +1 more source

Particle-resolved simulation of freely evolving particle suspensions: Flow physics and modeling [PDF]

International Journal of Multiphase Flow, 2021
The objective of this study is to understand the dynamics of freely evolving particle suspensions over a wide range of particle-to-fluid density ratios. The dynamics of particle suspensions are characterized by the average momentum equation, where the dominant contribution to the average momentum transfer between particles and fluid is the average drag
Vahid Tavanashad, Alberto Passalacqua, Shankar Subramaniam   +2 more
openaire   +3 more sources

Resolved Large Eddy Simulations of a Settling or Rising Spherical Microplastic Particle

Microplastics
The settling and rising of spherical microplastic particles with different Reynolds numbers, Re, were studied using a fully coupled large eddy simulation–discrete element method (LES-DEM) model, where the particles were treated using the immersed ...
Koray Deniz Goral, Bjarke Eltard Larsen, Hasan Gokhan Guler, Stefan Carstensen, Erik Damgaard Christensen, David R. Fuhrman   +5 more
doaj   +1 more source

Numerical methods and time-dependent physical models for the design and diagnostic of pulsed-dc magnetrons [PDF]

, 2006
Pulsed DC operation of magnetrons is a relatively new sputtering technique that significantly improves the properties of deposited layers. The understanding and control of phenomena taking place during pulsed DC sputtering requires new time-resolved ...
Moiseev, Tamara
core   +2 more sources

Spatially-resolved dynamic sampling of different phasic magnetic resonances of nanoparticle ensembles in a magnetotactic bacterium Magnetospirillum magnetotacticum

New Journal of Physics, 2023
Nanoscaled magnetic particle ensembles are promising building blocks for realizing magnon based binary logic. Element-specific real-space monitoring of magnetic resonance modes with sampling rates in the GHz regime is imperative for the experimental ...
Thomas Feggeler, Johanna Lill, Damian Günzing, Ralf Meckenstock, Detlef Spoddig, Maria V Efremova, Sebastian Wintz, Markus Weigand, Benjamin W Zingsem, Michael Farle, Heiko Wende, Katharina J Ollefs, Hendrik Ohldag   +12 more
doaj   +1 more source

Explaining global surface aerosol number concentrations in terms of primary emissions and particle formation [PDF]

, 2010
We synthesised observations of total particle number (CN) concentration from 36 sites around the world. We found that annual mean CN concentrations are typically 300–2000 cm -3 in the marine boundary layer and free troposphere (FT) and 1000–10 000 cm -3 ...
Mihalopoulos, Nikos, Wiedensohler, Alfred, Andrews, Elisabeth, J. Gras, A. Hamed, Mann, G.W., K. Sellegri, Baltensperger, Urs, Kivekäs, Niku, M. Komppula, A. Laaksonen, Mihalopoulos, Ninolaos, J. Merikanto, A. Wiedensohler, Sun, Junying, Harrison, Roy M., Mihalopoulos, N., Boy, M., Jennings, S. Gerard, Birmili, Wolfram, A. Minikin, P. Laj, Merikanto, J., Ogren, J. A., Ogren, John A., Laakso, Lauri, Weller, Rolf, S. G. Jennings, Reddington, C.L., Pickering, S., R. M. Harrison, Mann, G. W., Kulmala, Markku, Minikin, Andreas, Boy, Michael, Laaksonen, A., M. Kulmala, N. Kivekäs, O'Dowd, C., U. Baltensperger, Carslaw, K.S., L. Laakso, Ogren, J.A., Carslaw, K. S., R. Talbot, Spracklen, D.V., Reddington, Carly L., Talbot, R., K. S. Carslaw, M. Boy, Harrison, R. M.; id_orcid, Andrews, E., W. Birmili, Sellegri, Karine, Lihavainen, Heikki, Gras, J., Krejci, Radovan,, O'Dowd, Colin D., Spracklen, D. V., Sun, Youbin, Baltensperger, U., Krejci, Radek, O'Dowd, Collin D., Komppula, M., Sellegri, K., Talbot, Robert, Kouvarakis, Giorgos, Laj, P., G. W. Mann, Jennings, S.G., Hamed, A., Weingartner, E., Krejci, R., Carslaw, Kenneth S., Lihavainen, H., Wiedensohler, A., Harrison, R. M., Sun, J., Birmili, W., Mann, Graham W., Bonn, B., Kivekäs, N., Komppula, Mika, Spracklen, Dominick V., Merikanto, Joonas, Laj, Paolo, Hamed, Amar, Jennings, S. G., E. Weingartner, Weingartner, Ernest, Laakso, L., J. A. Ogren, Minikin, A., R. Krejci, Gras, John, S. Pickering, Reddington, C. L., Harrison, R.M., Jennings, Stephen G., Pickering, Steven, H. Lihavainen, B. Bonn, C. O'Dowd, Weller, R., Kulmala, M., N. Mihalopoulos, J. Sun, G. Kouvarakis, Kouvarakis, G., E. Andrews, D. V. Spracklen, Bonn, Boris, Lihavainen, H.Finnish Meteorol. Inst.,, Laaksonen, Ari, C. L. Reddington, Krejci, Radovan, Harrison, Roy Michael, R. Weller   +117 more
core   +2 more sources

Particle-resolved simulation of antidunes in free-surface flows

Journal of Fluid Mechanics, 2023
The interaction of supercritical turbulent flows with granular sediment beds is challenging to study both experimentally and numerically. This challenging task has hampered advances in understanding antidunes, the most characteristic bedform of supercritical flows.
Schwarzmeier, Christoph, Rettinger, Christoph, Kemmler, Samuel, Plewinski, Jonas, Núñez-González, Francisco, Köstler, Harald, Rüde, Ulrich, Vowinckel, Bernhard   +7 more
openaire   +4 more sources

Idealized particle-resolved large-eddy simulations to evaluate the impact of emissions spatial heterogeneity on CCN activity [PDF]

Atmospheric Chemistry and Physics
Aerosol-cloud interactions remain a large source of uncertainty in global climate models (GCMs) due to complex, nonlinear processes that alter aerosol properties and the inability to represent the full compositional complexity of aerosol populations ...
S. G. Frederick, M. Mohebalhojeh, J. H. Curtis, J. H. Curtis, M. West, N. Riemer   +5 more
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Numerical simulation of retention and release of colloids in porous media at the pore scale [PDF]

, 2013
Transport of a solid colloidal particle was simulated at the pore scale in presence of surface roughness and particle/pore physicochemical interaction by adopting a “one fluid” approach.
AHMADI-SENICHAULT, Azita, OMARI, Aziz, SEFRIOUI, Nisrine, BERTIN, Henri, OMARI, Abdelaziz, Ahmadi, Azita   +5 more
core   +1 more source