Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
658065 | International Journal of Heat and Mass Transfer | 2014 | 11 Pages |
Abstract
The present work assesses the limits of the Oberbeck–Boussinesq (OB) approximation for the resolution of turbulent fluid flow and heat transfer inside a tall differentially heated cavity of aspect ratio Γ = 6.67 filled with water (Pr = 3.27, Ra = 2.12 × 1011). The cavity models the integrated solar collector-storage element installed on an advanced façade. The implications of the Oberbeck–Boussinesq approximation is submitted to investigation by means of direct numerical simulations (DNS) carried out for a wide range of temperature differences. Non-Oberbeck–Boussinesq (NOB) effects are found to be relevant, especially beyond the temperature difference of 30 °C, in the estimation of heat transfer, stratification, and flow configuration.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
D. Kizildag, I. Rodríguez, A. Oliva, O. Lehmkuhl,