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Pregled eksplicitnih aproksimacija Kolbrukove jednačine za koeficijent trenja
A review of explicit approximations of Colebrook's equation
dc.creator | Genić, Srbislav | |
dc.creator | Aranđelović, Ivan | |
dc.creator | Kolendić, Petar | |
dc.creator | Jarić, Marko | |
dc.creator | Budimir, Nikola | |
dc.creator | Genić, Vojislav | |
dc.date.accessioned | 2022-09-19T16:41:41Z | |
dc.date.available | 2022-09-19T16:41:41Z | |
dc.date.issued | 2011 | |
dc.identifier.issn | 1451-2092 | |
dc.identifier.uri | https://machinery.mas.bg.ac.rs/handle/123456789/1265 | |
dc.description.abstract | U radu je dat pregled najčešće korišćenih eksplicitnih jednačina za određivanje koeficijenta trenja u glatkim i hrapavim cevima. Odstupanje navedenih jednačina od Kolbrukove jednačine izraženo je preko srednje relativne greške, maksimalne pozitivne greške, maksimalne negativne greške, srednjeg odstupanja i korelacionog odnosa. Osim navedenih kriterijuma, poređenje jednačina je izvršeno i korišćenjem 'Model selection criterion' (MSC) i 'Akaike Information Criterion' (AIC). Navedenom analizom ustanovljeno je da su odstupanja jednačine koju su predložili Zigrang i Silvester najmanja u odnosu na Kolbrukovu relaciju, a da je Halandova jednačina najpogodnija za inženjersku upotrebu. | sr |
dc.description.abstract | The most common explicit correlations for estimation of the friction factor in rough and smooth pipes are reviewed in this paper. Comparison of any friction factor equation with the Colebrook's equation was expressed trough the mean relative error, the maximal positive error, the maximal negative error, correlation ratio and standard deviation. The statistical comparison of different equations was also carried out using the 'Model selection criterion' and 'Akaike Information Criterion'. It was found that the equation of Zigrang and Sylvester provides the most accurate value of friction factor, and that Haaland's equation is most suitable for hand calculations. | en |
dc.publisher | Univerzitet u Beogradu - Mašinski fakultet, Beograd | |
dc.rights | openAccess | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | FME Transactions | |
dc.subject | turbulent flow | en |
dc.subject | friction factor | en |
dc.subject | fluid mechanics | en |
dc.subject | Colebrook's equation | en |
dc.subject | approximations | en |
dc.title | Pregled eksplicitnih aproksimacija Kolbrukove jednačine za koeficijent trenja | sr |
dc.title | A review of explicit approximations of Colebrook's equation | en |
dc.type | article | |
dc.rights.license | BY | |
dc.citation.epage | 71 | |
dc.citation.issue | 2 | |
dc.citation.other | 39(2): 67-71 | |
dc.citation.rank | M51 | |
dc.citation.spage | 67 | |
dc.citation.volume | 39 | |
dc.identifier.fulltext | http://machinery.mas.bg.ac.rs/bitstream/id/228/1262.pdf | |
dc.identifier.rcub | https://hdl.handle.net/21.15107/rcub_machinery_1265 | |
dc.identifier.scopus | 2-s2.0-84859486848 | |
dc.type.version | publishedVersion |