Cleveland Cavaliers forward LeBron James (23) celebrates with teammate Jordan Clarkson during the second half of the team’s NBA basketball game against the Oklahoma City Thunder in Oklahoma City, Tuesday, Feb. 13, 2018. (AP Photo/Sue Ogrocki)The stars will be out in Los Angeles, on the basketball court and all around it.The NBA’s All-Star festivities are back at Staples Center, with the usual events on All-Star Saturday night and a new format for the game Sunday.ADVERTISEMENT Lights inside SMX hall flicker as Duterte rants vs Ayala, Pangilinan anew Steam emission over Taal’s main crater ‘steady’ for past 24 hours Sea turtle trapped in net freed in Legazpi City GALLERY: Barangay Ginebra back as PBA Governors’ Cup kings LATEST STORIES Phivolcs records 2 ‘discrete weak ash explosions’ at Taal Volcano Some things to watch as Los Angeles hosts the All-Star Game for a record sixth time:LEBRON IN L.A.: James refuses to discuss his free agency during the season, but figure on it coming up in Los Angeles since there’s been such speculation about him signing with the Lakers. The Lakers, after a trade with James’ Cavaliers last week, would have enough salary cap space to offer a maximum contract to James and another star if he opts to become a free agent and leave Cleveland this summer.HOMECOMING KINGS: The Los Angeles area is home to a number of All-Stars, including 2017 MVP Russell Westbrook of Oklahoma City and runner-up James Harden, along with Oklahoma City’s Paul George and Toronto’s DeMar DeRozan.SIDELINED STARS: James’ team will look much different than the one he drafted after a number of injuries. DeMarcus Cousins, Kevin Love, John Wall and Kristaps Porzingis all were forced to pull out. George, Andre Drummond, Goran Dragic and Kemba Walker were added as injury replacements by Commissioner Adam Silver.DUNK LIKE DAD: Larry Nance Jr., one of the players who went from Los Angeles to Cleveland in the four-player trade at the deadline, will be back in his former home arena to compete in the Slam Dunk Contest. He’ll try to follow in the footsteps — or flight path — of his father, who won the NBA’s first slam dunk title in 1984. Rookies Donovan Mitchell of Utah and Dennis Smith Jr., and Indiana All-Star Victor Oladipo round out the field.ADVERTISEMENT It’s too early to present Duterte’s ‘legacy’ – Lacson Nueva Ecija warehouse making fake cigarettes raided, 29 Chinese workers nabbed MOST READ BIEBS IS BACK: Bieber will return to play in the celebrity game on Friday night after winning MVP honors in the 2011 game. He will play on Team Lakers, co-coached by actor Michael B. Jordan. They will play against Team Clippers, who feature Academy Award winner Jaime Foxx.ALL-STAR SINGERS: Fergie will sing the U.S. national anthem and Barenaked Ladies will perform the Canadian national anthem. Pharrell Williams and N.E.R.D will take the stage at halftime. Kendrick Lamar also is set to perform Friday night in Los Angeles as part of the weekend festivities. Sports Related Videospowered by AdSparcRead Next Don’t miss out on the latest news and information. Arellano stuns Perpetual, nears NCAA men‘s volleyball crown UK plans Brexit celebrations but warns businesses may suffer Captains LeBron James and Stephen Curry drafted players from the pool of All-Stars and the winning team gets a $350,000 donation from the NBA to the charity it chose. The league is hoping the new format that replaced the traditional East-West matchup will make it more competitive after a couple of lackluster games the previous two years.Perhaps the players can heed the words of Kobe Bryant, who won the MVP award on his home floor when the All-Star Game was last in Los Angeles in 2011.FEATURED STORIESSPORTSTim Cone, Ginebra set their sights on elusive All-Filipino crownSPORTSGinebra beats Meralco again to capture PBA Governors’ Cup titleSPORTSAfter winning title, time for LA Tenorio to give back to Batangas folk“I feel like we have a sense of responsibility and we are voted in for what we do during the season, which is play hard,” Bryant said following that game. “And we come here, that’s what the fans want to see. They want to see us go at it and see us compete and that’s what I try to do and that’s what I try to tell my teammates to do.”Bryant is gone now but Beyonce and Jay-Z, Jack Nicholson and Justin Bieber are among the celebrities who attended that game and are scheduled to be back for at least some of this weekend. Carpio hits red carpet treatment for China Coast Guard PLAY LIST 02:14Carpio hits red carpet treatment for China Coast Guard02:56NCRPO pledges to donate P3.5 million to victims of Taal eruption00:56Heavy rain brings some relief in Australia02:37Calm moments allow Taal folks some respite03:23Negosyo sa Tagaytay City, bagsak sa pag-aalboroto ng Bulkang Taal01:13Christian Standhardinger wins PBA Best Player award Phivolcs records 2 ‘discrete weak ash explosions’ at Taal Volcano View comments
Researchers at the Weizmann Institute of Science, the University of Rome, CNRS and the University of Helsinki have recently carried out a study investigating the difference between 3-D anisotropic turbulence in classical fluids and that in superfluids, such as helium. Their findings, published in Physical Review Letters (PRL), are supported by both theory and experimental evidence. Mathematician makes breakthrough in understanding of turbulence Explore further Citation: Study shows the difference between classical flows and superfluid helium in 3-D counter-flow (2019, April 22) retrieved 18 August 2019 from https://phys.org/news/2019-04-difference-classical-superfluid-helium-d.html More information: L. Biferale et al. Superfluid Helium in Three-Dimensional Counterflow Differs Strongly from Classical Flows: Anisotropy on Small Scales, Physical Review Letters (2019). DOI: 10.1103/PhysRevLett.122.144501 Credit: Biferale et al. “The present research was initiated by our group at the Weizmann Institute, Israel, comprised by Victor L’vov, Itamar Procaccia and Anna Pomyalov, who were trying to understand novel experimental observations by the groups of Prof. Wei Guo from Florida State University, Tallahassee and Prof. Ladislav Skrbek from Charles University, in Prague,” Itamar Procaccia, one of the researchers who carried out the study, told Phys.org. “Our main objective was to understand an apparent surprising difference in how energy distributes between turbulent eddies of different scales in classical viscous fluids like air and water and superfluids like helium at low temperatures.”All turbulent flows, both in nature and laboratory settings, are anisotropic on energy injection scales, meaning that energy distributes differently between their turbulent eddies. Past studies have shown that the model of homogeneous and isotropic turbulence (HIT) is particularly effective for predicting the statistical properties of turbulence on scales much smaller than stirring scales, yet larger than dissipative scales. In classical fluids, 3-D anisotropic turbulence tends towards isotropy and homogeneity with decreasing scales, hence it is eventually possible to apply the HIT model to them. In their study, however, Procaccia and his colleagues demonstrated that the opposite is true for superfluid 4He turbulence in 3-D counter-flow channel geometry, which becomes less isotropic as scales decrease, to the point of becoming almost two-dimensional. The approach used by them involves a so-called ‘two-fluid model’ of superfluid helium. This model is based on the early work of Laszlo Tisza and Lev Landau back in 1940-1941, which was later improved by H. Hall, W.F. Vinen, I.M. Khalatnikov, and I.L Bekarevich. “The model describes superfluid helium as an interpenetrating mixture of two fluids: a superfluid that moves without friction, and a normal viscous fluid that are coupled by a mutual friction,” Procaccia explained. Past studies carried out by two teams of researchers in Tallahasse, Florida and Prague examined superfluid helium under a temperature gradient, creating what is referred to as ‘counter-flow’. As suggested by its name, in counter-flow different components of a fluid flow in opposite directions; the superfluid flows from the cold to the hot side and the normal fluid from the hot to the cold side. “Our model rationalized some of these experimental observations and predicted new features that were later confirmed experimentally,” Procaccia explained. “The main result of our study is that contrary to classical turbulent flows which become more and more isotropic at smaller scales, the flow we examined becomes less and less isotropic as the scales reduce.” Before they carried out their study, Procaccia and his colleagues had theoretically predicted that their experiments would lead to the observations that they subsequently collected. However, the strength of the effect they observed only became clear after they carried out direct numerical simulations on a EU supercomputer, in collaboration with a team of researchers led by Luca Biferale. According to Procaccia, their theoretical and numerical findings have already motivated other experimental groups to pursue further research into counter-flow turbulence. “At the Weizmann Institute, we are now developing our theory further, being attentive to the new experimental techniques that enable elaborate studies of turbulence in superfluid helium,” Procaccia said. “Our group continues to participate in the analysis of new experimental data, hoping to contribute to deeper understanding of superfluid flows from laboratory experiments to cosmological realization, such as neutron stars.” © 2019 Science X Network Journal information: Physical Review Letters This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.