CFD simulation of the convective flows in the vertical caverns
| Autor: | M.R. Petrichenko, V.V. Sergeev, D. Nemova, E.V. Kotov, D.S. Andreeva |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
average velocity
building and construction cfd civil and structural engineering enclosing structure energy efficiency heat-gravitational motion cfd simulation computational fluid dynamics simulations residential building Engineering (General). Civil engineering (General) TA1-2040 Building construction TH1-9745 |
| Zdroj: | Инженерно-строительный журнал, Vol 92, Iss 8, Pp 76-83 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2071-0305 |
| DOI: | 10.18720/MCE.92.6 |
| Popis: | The purpose of this paper is determination the critical geometric dimensions of a three-dimensional vertical heated cavern. In this rate the convection's contribution to heat transfer will be limited due to thermal conductivity at a fixture temperature drop. The model validated and verified by comparison with the experimental results. А stable non-stationary flow regime is observed for Rayleigh number Ra = 15,000, because the temperature fields in different cross-sections of the flow coincide. For the flow with Rayleigh number Ra = 15,000, the nonstationary formulation without the turbulence model did not give the required convergence on residuals. So it was calculated by using the three-dimensional RANS approach closed with the k-w SST turbulence model. In this case the flow is unstable in the third direction, therefore it is impossible to consider the cavern as a heat insulator at numbers Ra = 10,000 and above. |
| Databáze: | Directory of Open Access Journals |
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