{"id":61361,"date":"2016-07-19T18:41:00","date_gmt":"2016-07-19T22:41:00","guid":{"rendered":"https:\/\/www.nasa.gov\/?migration=converted-node-387629"},"modified":"2023-07-26T12:19:26","modified_gmt":"2023-07-26T16:19:26","slug":"discrete-velocity-method-for-simulating-rarefied-gas-flows-with-plasma","status":"publish","type":"post","link":"https:\/\/www.nasa.gov\/directorates\/stmd\/space-tech-research-grants\/discrete-velocity-method-for-simulating-rarefied-gas-flows-with-plasma\/","title":{"rendered":"Discrete Velocity Method for Simulating Rarefied Gas Flows with Plasma"},"content":{"rendered":"\n<p><strong>Yasvanth Poondla<\/strong><br>\n<em>The University of Texas at Austin<\/em><\/p>\n\n\n\n<p>I am proposing to develop a low cost computational method capable of simulating conditions during atmospheric reentry, where the flow is rarefied and ionized. To do so, I intend to modify an existing discrete velocity method (DVM) so it can handle electric and magnetic fields, as well as charged particles (ions and electrons). DVM is a Boltzmann equation (governing equation for flows where the motion of individual molecules must be considered) solver that restricts particle velocities to a finite set of values. The DVM in its current state is capable of modeling ions and electrons as another particle species. Chemical reactions that generate these particles will be added into the code. Electric and magnetic field calculations will be accomplished by a numerical solver. Code efficiency will be improved primarily through the implementation of adaptive velocity, spatial, and internal energy grids. This means that the resolution for these values can be adjusted on the fly. Doing so allows for improved solution quality only in flow regions of interest, minimizing the cost associated with the higher quality solution. Development of a low cost method for simulating atmospheric reentry conditions will allow us to better develop vehicles capable of operating in these conditions. Current computational methods for simulating rarefied gas flows require supercomputers and are not suited for handling trace species that have a significant impact on the flow. The DVM I propose to modify only requires a single core and is capable of simulating trace species accurately, This proposal addresses objectives in NASA\u2019s Entry, Descent, and Landing Technology Roadmap, specifically TA09.4.5.12, TA09.4.5.2, and TA09.4.5.6.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nasa.gov\/directorates\/spacetech\/strg\/nstrf-2016\"><strong>Back to NSTRF 2016 Full List<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yasvanth Poondla The University of Texas at Austin I am proposing to develop a low cost computational method capable of simulating conditions during atmospheric reentry, where the flow is rarefied and ionized. To do so, I intend to modify an existing discrete velocity method (DVM) so it can handle electric and magnetic fields, as well […]<\/p>\n","protected":false},"author":66,"featured_media":47963,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nasa_hds_core_meta_l10n":"en-US","nasa_hds_core_meta_article_editor":"","nasa_hds_core_meta_article_contacts":[],"nasa_hds_core_meta_article_topic":"","nasa_hds_core_meta_linked_locations":[],"nasa_hds_core_meta_article_related_articles":[],"hds_migrate_meta_pr_release_id":"","hds_migrate_meta_pr_release_type":"","nasa_hds_core_meta_location_x":"","nasa_hds_core_meta_location_y":"","nasa_hds_core_meta_gallery_images":[],"footnotes":""},"categories":[3337],"news-tags":[],"internal-terms":[9529,12750],"coauthors":[],"parsely":{"version":"1.1.0","meta":{"@context":"https:\/\/schema.org","@type":"NewsArticle","headline":"Discrete Velocity Method for Simulating Rarefied Gas Flows with Plasma","url":"https:\/\/www.nasa.gov\/directorates\/stmd\/space-tech-research-grants\/discrete-velocity-method-for-simulating-rarefied-gas-flows-with-plasma\/","mainEntityOfPage":{"@type":"WebPage","@id":"https:\/\/www.nasa.gov\/directorates\/stmd\/space-tech-research-grants\/discrete-velocity-method-for-simulating-rarefied-gas-flows-with-plasma\/"},"thumbnailUrl":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2016\/06\/hubble_friday_06242016.jpg?w=150&h=150&crop=1","image":{"@type":"ImageObject","url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2016\/06\/hubble_friday_06242016.jpg"},"articleSection":"NASA Directorates","author":[{"@type":"Person","name":"Loura Hall"}],"creator":["Loura Hall"],"publisher":{"@type":"Organization","name":"NASA","logo":"https:\/\/www.nasa.gov\/wp-content\/themes\/nasa\/assets\/images\/nasa-logo.svg"},"keywords":["NASA Directorates","Space Technology Mission Directorate","Space Technology Research Grants"],"dateCreated":"2016-07-19T22:41:00Z","datePublished":"2016-07-19T22:41:00Z","dateModified":"2023-07-26T16:19:26Z"},"rendered":"<meta name=\"parsely-title\" content=\"Discrete Velocity Method for Simulating Rarefied Gas Flows with Plasma\" \/>\n<meta name=\"parsely-link\" content=\"https:\/\/www.nasa.gov\/directorates\/stmd\/space-tech-research-grants\/discrete-velocity-method-for-simulating-rarefied-gas-flows-with-plasma\/\" \/>\n<meta name=\"parsely-type\" content=\"post\" \/>\n<meta name=\"parsely-image-url\" content=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2016\/06\/hubble_friday_06242016.jpg?w=150&h=150&crop=1\" \/>\n<meta name=\"parsely-pub-date\" content=\"2016-07-19T22:41:00Z\" \/>\n<meta name=\"parsely-section\" content=\"NASA Directorates\" \/>\n<meta name=\"parsely-tags\" content=\"NASA Directorates,Space Technology Mission Directorate,Space Technology Research Grants\" \/>\n<meta name=\"parsely-author\" content=\"Loura Hall\" \/>","tracker_url":"https:\/\/cdn.parsely.com\/keys\/nasa.gov\/p.js"},"read_time":2,"time_ago":"8 years","featured_image":{"id":47963,"file":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2016\/06\/hubble_friday_06242016.jpg","title":"The stars of the Large Magellanic Cloud","alt":"A gathering of red, white and blue stars in the constellation of Dorado","caption":"This NASA\/ESA Hubble Space Telescope image shows the globular cluster NGC 1854, a gathering of white and blue stars in the southern constellation of Dorado (The Dolphinfish). NGC 1854 is located about 135 000 light-years away, in the Large Magellanic Cloud (LMC), one of our closest cosmic neighbours and a satellite galaxy of the Milky Way. The LMC is a hotbed of vigorous star formation. Rich in interstellar gas and dust, the galaxy is home to approximately 60 globular clusters and 700 open clusters. These clusters are frequently the subject of astronomical research, as the Large Magellanic Cloud and its little sister, the Small Magellanic Cloud, are the only systems known to contain clusters at all stages of evolution. Hubble is often used to study these clusters as its extremely high-resolution cameras can resolve individual stars, even at the clusters\u2019 crowded cores, revealing their mass, size and degree of evolution."},"_links":{"self":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/posts\/61361"}],"collection":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/users\/66"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/comments?post=61361"}],"version-history":[{"count":1,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/posts\/61361\/revisions"}],"predecessor-version":[{"id":463508,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/posts\/61361\/revisions\/463508"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media\/47963"}],"wp:attachment":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media?parent=61361"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/categories?post=61361"},{"taxonomy":"news-tags","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/news-tags?post=61361"},{"taxonomy":"internal-terms","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/internal-terms?post=61361"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/coauthors?post=61361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}