CFD simulation of the convective flows in the vertical caverns

Инженерно-строительный журнал

D.S. Andreeva¹  V.V. Sergeev¹  M.R. Petrichenko¹  E.V. Kotov¹  D. Nemova¹ 

[1] Peter the Great St. Petersburg Polytechnic University;

关键词: 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;   

DOI  :  10.18720/MCE.92.6

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown