{"677445":{"#nid":"677445","#data":{"type":"news","title":"Georgia Tech Researchers Achieve World-Record Resolution in Turbulence Simulations","body":[{"value":"\u003Cp\u003EFrom the water that comes out of the faucet to the chemical reactions in jet engines that propel planes, turbulence affects our everyday lives. Researchers at Georgia Tech are studying the complex physics of turbulence in simplified settings that could help us better understand nature and engineering.\u003C\/p\u003E\u003Cp\u003EAt its most basic, turbulence comprises disorderly fluctuations over a wide range of scales in both time and three-dimensional space. These complexities mean that many fundamental aspects are still not understood. Computers can help unravel the mystery, but direct numerical simulations based on exact physical laws have always been very resource-intensive. Their challenges are greatest when investigating rare, very large fluctuations.\u003C\/p\u003E\u003Cp\u003ENow, Frontier, the world\u0027s first \u2014 and still fastest \u2014 Exascale computer, capable of a quintillion operations per second, is helping researchers to better understand turbulence.\u003C\/p\u003E\u003Cp\u003E\u201cTurbulence is very complex, theories are incomplete, and laboratory measurements are arduous,\u201d said \u003Ca href=\u0022https:\/\/www.me.gatech.edu\/faculty\/yeung\u0022\u003EP.K. Yeung\u003C\/a\u003E, a professor in the \u003Ca href=\u0022https:\/\/ae.gatech.edu\/\u0022\u003EDaniel Guggenheim School of Aerospace Engineering\u003C\/a\u003E with a courtesy joint appointment in the \u003Ca href=\u0022https:\/\/www.me.gatech.edu\/\u0022\u003EGeorge W. Woodruff School of Mechanical Engineering\u003C\/a\u003E. \u201cA world-leading resolution of over 35 trillion grid points on Frontier is expected to lead to new discoveries, which in turn can facilitate advances in modeling where both assumptions and predictions can be tested numerically.\u0022\u003C\/p\u003E\u003Cp\u003EYeung and his team accessed Frontier, located at the Oak Ridge National Laboratory, when it first went online and also received large allocations of time on the machine from the prestigious INCITE program, which is run by the U.S. Department of Energy\u0027s Office of Science. The power of Frontier resides primarily in powerful graphical processing units (GPUs), which compute rapidly. Yeung\u0027s group published a \u003Ca href=\u0022https:\/\/doi.org\/10.1016\/j.cpc.2024.109364\u0022\u003Ejournal article\u003C\/a\u003E that describes a highly successful algorithm specifically designed to take maximum advantage of Frontier\u0027s features to make simulations at extremely high resolution feasible and efficient.\u003C\/p\u003E\u003Cp\u003E\u201cIn many scientific fields, people thought calculations of this magnitude were not possible, but now we are there, perhaps earlier than anticipated,\u201d Yeung said. \u201cOur work on turbulence simulations also demonstrates several principles of advanced GPU programming of interest in other fields, especially those where so-called pseudo-spectral methods are important. The science impacts of our extreme scale simulations are expected to be further enhanced by public data-sharing in partnership with the National Science Foundation-supported Johns Hopkins Turbulence Database project.\u0022\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EExascale computing can help unlock many puzzles concerning extreme fluctuations.\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Exascale computing can help unlock many puzzles concerning extreme fluctuations."}],"uid":"34541","created_gmt":"2024-10-10 15:48:03","changed_gmt":"2024-10-11 14:04:44","author":"Tess Malone","boilerplate_text":"","field_publication":"","field_article_url":"","dateline":{"date":"2024-10-10T00:00:00-04:00","iso_date":"2024-10-10T00:00:00-04:00","tz":"America\/New_York"},"extras":[],"hg_media":{"675278":{"id":"675278","type":"image","title":"2024-Yeungjpg.jpg","body":"\u003Cp\u003ER.\u0026nbsp; Vaideswaran,\u0026nbsp; Prof. P.K Yeung, and D.L. Dotson pictured at a recent User Meeting at the Oak Ridge Leadership Computing Facility. [Photo Courtesy:\u0026nbsp;Carol Morgan\/Oak Ridge National Laboratory]\u003C\/p\u003E","created":"1728576749","gmt_created":"2024-10-10 16:12:29","changed":"1728576749","gmt_changed":"2024-10-10 16:12:29","alt":"R.  Vaideswaran,  Prof. P.K Yeung, and D.L. Dotson pictured at a recent User Meeting at the Oak Ridge Leadership Computing Facility. [","file":{"fid":"258884","name":"2024-Yeungjpg.jpg","image_path":"\/sites\/default\/files\/2024\/10\/10\/2024-Yeungjpg.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/2024\/10\/10\/2024-Yeungjpg.jpg","mime":"image\/jpeg","size":4839027,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/2024\/10\/10\/2024-Yeungjpg.jpg?itok=jffSKTeG"}}},"media_ids":["675278"],"groups":[{"id":"1214","name":"News Room"},{"id":"1188","name":"Research Horizons"}],"categories":[{"id":"136","name":"Aerospace"}],"keywords":[{"id":"187915","name":"go-researchnews"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003ETess Malone, Senior Research Writer\/Editor\u003C\/p\u003E\u003Cp\u003Etess.malone@gatech.edu\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}