| Campo DC | Valor | Idioma |
|---|
| dc.contributor.author | Ferrari, Jalusa Maria da Silva | - |
| dc.contributor.author | Kayser, Fábio Matos | - |
| dc.contributor.author | Goulart, Jhon Nero Vaz | - |
| dc.date.accessioned | 2022-02-10T18:13:57Z | - |
| dc.date.available | 2022-02-10T18:13:57Z | - |
| dc.date.issued | 2021 | - |
| dc.identifier.citation | FERRARI, J. M. S. ; KAYSER, F. M. ; GOULART, J.N.V. Numerical prediction of local convective heat transfer and skin friction in eccentric annulus tube. In: INTERNATIONAL CONFERENCE ON HEAT TRANSFER, FLUID MECHANICS AND THERMODYNAMICS (HEFAT), 15th., 2021, Virtual. | pt_BR |
| dc.identifier.uri | https://repositorio.unb.br/handle/10482/42850 | - |
| dc.language.iso | Inglês | pt_BR |
| dc.rights | Acesso Aberto | pt_BR |
| dc.title | Numerical prediction of local convective heat transfer and skin friction in eccentric annulus tube | pt_BR |
| dc.type | Trabalho | pt_BR |
| dc.subject.keyword | Transferência de calor | pt_BR |
| dc.subject.keyword | Tubos | pt_BR |
| dc.rights.license | Autorização concedida a Biblioteca Central da Universidade de Brasília pelo Prof. Jhon Nero Vaz Goulart, em 26 de outubro de 2021, para disponibilizar a obra gratuitamente, para fins acadêmicos e não comerciais (leitura, impressão e/ou download) a partir desta data. A obra continua protegida por Direito Autoral e/ou por outras leis aplicáveis. Qualquer uso da obra que não o autorizado sob esta licença ou pela legislação autorial é proibido. | pt_BR |
| dc.description.abstract1 | Non-isothermal turbulent flow was investigated in both concentric and eccentric annulus under the same thermal boundary conditions, using RANS and URANS/LES turbulence hybrid mode. Inlet temperature was prescribed at the entrance and constant wall heat flux, q” = 1000 [W/m²], was imposed on the inner's tube surface, while the outer wall was kept adiabatic.
The annulus geometric parameters inner (d), outer (D) diameters and length (L) were kept unchanged throughout the
computations, yielding d/D-ratio and L/Dh, 0.494 and 58.36, respectively. Two different eccentricities were simulated, e = 0
(concentric case) and 0.8. Stationary and time-dependent simulations were run for eccentric annulus, whereas for the
concentric one only stationary solution was obtained. Transient runs in eccentric annulus of 0.8 showed periodic flow patterns
producing high crossing velocity components and temperature fluctuations through the narrow gap. Further, such fluctuations
also improved the quality of the convective heat transfer, lowering the inner wall temperature, mainly near the narrow
gap. At the gap, the local convective heat transfer value with transient simulation was found almost 20% higher in
comparison with the stationary case for e = 0.8. Simulations were carried out under Reynolds number of 7300 and Prandlt
0.71. The flow dynamic of the flow was not affected by the thermal field. | pt_BR |
| dc.description.unidade | Faculdade UnB Gama (FGA) | - |
| Aparece nas coleções: | Trabalhos apresentados em evento
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