Nestabilnost Rayleigh-Benardove konvekcije pod uticajem varijacije temperature na gornjem zidu

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Sadoon Ayed

Apstrakt

Ovaj rad analizira prinudnu Rayleigh-Benard-ovu konvekciju između dva paralelna zida. Donji zid se hladi a gornji zagreva prema periodičnom prostornom rasporedu. Proces se modelira uz pomoć Navier-Stokes-ovih jednačina, jednačine kontinuiteta i jednačine energije. Rešenje diferencijalnih jednačina dobijeno primenom pseudo-spektralnog numeričkog postupka, kod koga je metod Fourier-Galerkin upotrebljen za diskretizaciju u homogenom smeru i metod Chebysev kolokoacioni za diskretizaciju u nehomogenom smeru. Vremenska diskretizacija izvršena je uz pomoć Adams-Bashworthovog, dvo-koračnog metoda drugog reda. Rezultati direktne numeričke simulacije predstavljeni su slikama polja vrtložnosti, toka i brzine za šest različitih vremenskih trenutaka.

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Kako citirati
AYED, Sadoon. Nestabilnost Rayleigh-Benardove konvekcije pod uticajem varijacije temperature na gornjem zidu. KGH – Klimatizacija, grejanje, hlađenje, [S.l.], v. 50, n. 1, p. 61-68, feb. 2021. ISSN 2560-340X. Dostupno na: <http://izdanja.smeits.rs/index.php/kgh/article/view/6444>. Datum pristupa: 21 apr. 2021
Sekcija
Tematski članci

Reference

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