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master's thesis
Numeričke simulacije stlačivog strujanja fluida korištenjem spregnutog algoritma
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2014. urn:nbn:hr:235:924169
Šunjo, Karlo
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

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

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Šunjo, K. (2014). Numeričke simulacije stlačivog strujanja fluida korištenjem spregnutog algoritma (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:924169

Šunjo, Karlo. "Numeričke simulacije stlačivog strujanja fluida korištenjem spregnutog algoritma." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2014. https://urn.nsk.hr/urn:nbn:hr:235:924169

Šunjo, Karlo. "Numeričke simulacije stlačivog strujanja fluida korištenjem spregnutog algoritma." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2014. https://urn.nsk.hr/urn:nbn:hr:235:924169

Šunjo, K. (2014). 'Numeričke simulacije stlačivog strujanja fluida korištenjem spregnutog algoritma', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 18 January 2025, https://urn.nsk.hr/urn:nbn:hr:235:924169

Šunjo K. Numeričke simulacije stlačivog strujanja fluida korištenjem spregnutog algoritma [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2014 [cited 2025 January 18] Available at: https://urn.nsk.hr/urn:nbn:hr:235:924169

K. Šunjo, "Numeričke simulacije stlačivog strujanja fluida korištenjem spregnutog algoritma", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2014. Available at: https://urn.nsk.hr/urn:nbn:hr:235:924169

Metadata
TitleNumeričke simulacije stlačivog strujanja fluida korištenjem spregnutog algoritma
Title (english)Numerical simulation of compressible flows using a coupled density-based solution algorithm
AuthorKarlo Šunjo
MentorHrvoje Jasak (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2014-07-18, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U ovom radu izvršit će se validacija numeričkog algoritma za rješavanje strujanja visokog Machovog broja. Algoritam je pisan u okruženju OpenFOAM te je nov u tom kontekstu. Prvo će se opisati glavne matematičke i numerike probleme koje se susreće u teoriji poput Riemannovog problema te načina rješavanja tog problema. Opisani su ponuđeni rješavači Riemannovog problema uz ostale diskretizacijske sheme koje su standardne u računalnoj dinamici fluida. Algoritam koji koristi gustoću kao glavnu proračunsku varijablu će se validirati na temelju slučajeva za koje se moglo naći eksperimentalne i numeričke rezultate. Pokazalo se kako djeluje profinjenje proračunske mreže na rezultate te kakve rezultate daje u odnosu na algoritme koji koriste tlak kao glavnu proračunsku varijablu. U proračunima je korišten isključivo k - omega SST model turbulencije zbog visokih iznosa Reynoldsovog broja, osim u jednom slučaju za kojeg se pretpostavilo kvazilaminarno strujanje. Slučajevi koji su uzeti su geometrije krila, jednostavni "shock tube" i kovergentno-divergentne mlaznice. Rezultati proračuna će se prikazati grafički u vidu polja primitivnih varijabli i bezdimenzijskih značajki te će ih se usporediti s postojećim eksperimentalnim i referentnim numeričkim rješenjima.
Abstract (english)
In this work the validation of new algorithm was done. Algorithm is written in OpenFOAM environment and it is new in that context. Firstly, main mathematical and numerical problems were introduced as well as ways to solve those problems such as Riemann problem. Approximate Riemann solvers which are available in new code were theoretically described. This algorithm which uses density as main calculation variable was validated against cases for wich results were available in literature or internet. The impact of mesh re nement was shown and also the comparison against pressure-based algorithm. In all cases except one k - omega SST turbulence model was used because of very high Reynolds numbers. In one of cases quasi-laminar ow was assumed. Geometries in simulated cases are a transonic wing, shock-tube and convergent-deivergent nozzles, namely, cases that are of interes of industry. Results of simulations were graphically shown as elds of primitive variables and dimensionless numbers.
Keywords
Keywords (english)
Languageenglish
URN:NBNurn:nbn:hr:235:924169
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
Terms of useLicence In copyright icon
Created on2019-05-22 11:15:59