{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-T83HCZ1D/f1f6905c-34be-41c6-b16b-4b6b077e4ddc/PDF","dcterms:extent":"603 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-T83HCZ1D/a8c92510-de43-4fcf-b8d9-559714175021/TEXT","dcterms:extent":"29 KB"}],"edm:TimeSpan":{"@rdf:about":"1999-2025","edm:begin":{"@xml:lang":"en","#text":"1999"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:doc-T83HCZ1D","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-WP8SPN4L"},{"@xml:lang":"sl","#text":"Acta hydrotechnica"}],"dcterms:issued":"2017","dc:creator":["Četina, Matjaž","Novak, Gorazd","Rak, Gašper","Žagar, Dušan"],"dc:format":[{"@xml:lang":"sl","#text":"letnik:30"},{"@xml:lang":"sl","#text":"številka:53"},{"@xml:lang":"sl","#text":"str. 97-105"}],"dc:identifier":["ISSN:1581-0267","COBISSID_HOST:8257889","URN:URN:NBN:SI:doc-T83HCZ1D"],"dc:language":["en","sl"],"dc:publisher":{"@xml:lang":"sl","#text":"Fakulteta za gradbeništvo in geodezijo"},"dcterms:temporal":{"@rdf:resource":"1999-2025"},"dc:title":{"@xml:lang":"sl","#text":"Uporaba programa Dual SPHysics za 3D simulacije porušitve vodnega stolpca - primerjava računskih časov procesorjev in grafične kartice| Application of Dual SPHysics code for 3D simulations of dam breakage - a comparison of computational times of the central and graphics processing unit|"},"dc:description":[{"@xml:lang":"sl","#text":"Computational fluid dynamics has introduced a relatively recently developed method called smoothed particle hydrodynamics (SPH), which is gaining its importance alongside other established methods and models. In contrast to Eulerian methods, which employ numerical meshes, SPH is a Lagrangian method, which simulates the flow using fluid particles and thus better simulates free surface flows with very significant changes of water surface and flow velocities. The most typical applications of SPH include simulations of dam breakage and simulations of waves breaking along a beach. The most recent version of the open source code Dual SPHysics, which utilizes C++ and Compute Unified Device Architecture (CUDA), was employed to separately calculate standard test cases using a common central processing unit (CPU), a more capable CPU, and a graphics processing unit (GPU). Comparison of total computational times showed that computations using GPU were on average up to 70-times faster than using common CPU, and up to 8-times faster than using more powerful CPU. Some additional cases of 3D dam break simulation were performed to demonstrate the use of the code. By modifying the input files of the existing test cases one can simulate a wide range of hydrodynamic problems, characterized by significantly non-linear changes in the waters surface"},{"@xml:lang":"sl","#text":"Na področju računalniške dinamike tekočin se ob uveljavljenih metodah in modelih čedalje več pozornosti namenja metodi hidrodinamike zglajenih delcev SPH (angl. smoothed particle hydrodynamics). Za razliko od Eulerjevih metod, kjer simulacija toka temelji na numerični mreži, je SPH brezmrežna Lagrangeova metoda, ki tok simulira z delci in je zato primernejša za obravnavo tistih vrst toka s prosto gladino, kjer nastopajo izrazite spremembe gladin in hitrosti. Med najbolj značilnimi primeri uporabe SPH so simulacije porušitev vodnega stolpca in simulacije rušenja valov ob obali. Z uporabo najnovejše različice odprtokodnega programa Dual SPHysics, ki združuje C++ in paralelno računsko arhitekturo CUDA, so bili razpoložljivi standardni primeri izračunani z uporabo običajnega in zmogljivejšega procesorja (CPU) ter nato še z uporabo zmogljive grafične kartice (GPU). Primerjava trajanja izračunov je pokazala, da se računi z uporabo GPU izvedejo v povprečju do 70-krat hitreje kot na običajnem CPU in do 8-krat hitreje kot na zmogljivejšem CPU. Za ponazoritev uporabnosti metode SPH so bili izračunani dodatni primeri tridimenzionalne simulacije porušitve vodnega stolpca in obtekanja dolvodno ležečega objekta. S spreminjanjem vhodnih datotek obstoječih testnih primerov je možno simulirati širok nabor hidrodinamičnih problemov, pri katerih nastopa izrazito spreminjanje gladine"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:doc-T83HCZ1D","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:doc-T83HCZ1D"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:doc-T83HCZ1D/f1f6905c-34be-41c6-b16b-4b6b077e4ddc/PDF"},"edm:rights":{"@rdf:resource":"http://creativecommons.org/licenses/by-nc-sa/4.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Univerza v Ljubljani, Fakulteta za gradbeništvo in geodezijo"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:doc-T83HCZ1D/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:doc-T83HCZ1D"}}}}