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master's thesis
Razvoj automatskog algoritma za pronalazak receptora kod preklapajućih mreža u Foam-Extend softveru
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. urn:nbn:hr:235:199044
Katavić, Josip
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Katavić, J. (2018). Razvoj automatskog algoritma za pronalazak receptora kod preklapajućih mreža u Foam-Extend softveru (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:199044

Katavić, Josip. "Razvoj automatskog algoritma za pronalazak receptora kod preklapajućih mreža u Foam-Extend softveru." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:199044

Katavić, Josip. "Razvoj automatskog algoritma za pronalazak receptora kod preklapajućih mreža u Foam-Extend softveru." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:199044

Katavić, J. (2018). 'Razvoj automatskog algoritma za pronalazak receptora kod preklapajućih mreža u Foam-Extend softveru', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 26 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:199044

Katavić J. Razvoj automatskog algoritma za pronalazak receptora kod preklapajućih mreža u Foam-Extend softveru [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2018 [cited 2024 December 26] Available at: https://urn.nsk.hr/urn:nbn:hr:235:199044

J. Katavić, "Razvoj automatskog algoritma za pronalazak receptora kod preklapajućih mreža u Foam-Extend softveru", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:235:199044

Metadata
TitleRazvoj automatskog algoritma za pronalazak receptora kod preklapajućih mreža u Foam-Extend softveru
Title (english)Development of automatic fringe assembly algorithm for overset meshes in Foam-Extend software
AuthorJosip Katavić
MentorHrvoje Jasak (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2018-07-13, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U ovom radu je opisana tehnika overset mreža korištena u foam-extend softverskom paketu, novorazvijeni algoritam za pronalazak interpolacijskog sloja, kao i teorija bočnog porinuća brodova s horizontalnog ležaja pomoću sustava zakretnih saonika. Tijekom nekoliko posljednjih desetljeća, tehnika overset mreža, poznata kao i tehnnika Chimera ili preklapajućih mreža, se razvija u području računalne dinamike fluida (RDF). Tehnika overset mreža, u postupku prostorne diskretizacije računalne domene, podrazumijeva korištenje više računalnih mreža (overset regija), koje nisu povezane i generirane su zasebno. Sustav overset mreža se uobičajeno sastoji od pozadinske mreže kojom se diskretizira šire okruženje objekta, te od jedne ili više mreža kojima se prostorno diskretizira računalna domena u blizini samog objekta. Ovaj pristup najveći značaj ima u simulacijama tokova fluida u kojima je prisutno više objekata, kao i u simulacijama s pomičnim objektima i objektima u neposrednoj blizini ili zahvatu. Jednako tako se ovaj pristup koristi u parametrizacijskim i optimizacijskim proračunima. Ovaj pristup omogućuje brže i jednostavnije generiranje računalnih mreža visoke kvalitete, koje su u većini slučajeva strukturirane. Interpolacija polja fizikalnih veličina izmedu mreža se odvija kroz tzv. interpolacijski sloj. U ovom radu je razvijen automatski algoritam za odredivanje interpolacijskog sloja. Algoritam je implementiran u foam-extend softverski paket. Testiranje algoritma kao pretprocesorskog alata je provedeno na tri testna slučaja te na jednom testnom slučaju s prisustvom strujanja fluida. Prvi testni slučaj je dvo-komponentna overset mreža cilindra u kanalu. Testirana je mogućnost algoritma da pronade interpolacijski sloj s i bez relativnih gibanja mreža, odnosno statički i dinamički interpolacijski sloj. Drugi testni slučaj je tro-komponentna overset mreža NACA 4412 aeroprofila. Testirana je mogućnost pronalaska statičkog interpolacijskog sloja na sustavu koji se sastoji od više od dvije mreže. Treći testni slučaj je šestero-komponentna overset mreža ONR Tumblehome broda. Posljednji testni slučaj je bočno porinuće broda s horizontalnog ležaja pomoću sustava zakretnih saonika (dvo-komponentna overset mreža). Ovdje je testirana mogućnost algoritma da pronade dinamički interpolacijski sloj u numeričkoj simulaciji s prisustvom strujanja fluida. Jednako tako, ovaj testni slučaj je korišten i za validaciju Naval Hydro softverskog paketa.
Abstract (english)
In this thesis, overset mesh approach used in foam-extend software, newly developed fringe assembly algorithm and side launching of a ship by tipping table theory are presented. Throughout the past few decades, the overset mesh approach, also known as Chimera and overlapping mesh approach, is being developed in the field of Computational Fluid Dynamics (CFD). Overset meshing refers to the use of multiple disconnected meshes (overset regions), which are meshed separately, to discretise the flow domain. Overset mesh system typically consists of a background mesh adapted to the environment and one or more overset meshes attached to bodies, overlapping with the background mesh. This approach has much of its advantages in the computation of multiple-body and moving body problems as well as in parametric studies and optimisation analyses. The interpolation of the field data between meshes occurs through the fringe layer. For the purpose of this Thesis, an automatic fringe assembly algorithm for overset meshes is developed and implemented in foam-extend software. Validation has been carried out on three test cases without and one test case with fluid flow present. The first test case was a two-levels mesh of a cylinder in a channel. Capability to obtain static and dynamic overset mesh assembly was tested. The second test case was a three-levels mesh of NACA 4412 airfoil, where the capability of obtaining static overset fringe assembly on overset mesh system which contains more than two meshes was tested. The third test case was six-levels ONR Tumblehome ship. The last test case was a side launching of a tanker by tipping table principle, where the capability to obtain dynamic overset fringe assembly with a presence of fluid flow, as well as Naval Hydro Pack, were tested.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:199044
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2019-05-22 22:47:29