Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7054646 | International Journal of Heat and Mass Transfer | 2018 | 8 Pages |
Abstract
Numerical and experimental results obtained for the steady-state flow in a thin vertical liquid layer heated locally from below are discussed. Based on these results, two laminar regimes at Rayleigh numbers from Raâ¯=â¯102-107 have been distinguished. The first regime is characterized by a symmetric two-roll convective pattern. As soon as the Rayleigh number exceeds some critical value, the mirror symmetry is broken, and convective plumes tilt. A deflection of convective plumes from the vertical affects heat transfer conditions, and therefore this behaviour can be viewed as a second laminar regime. The location of the boundary between these two laminar regimes is considered in relation to the heat conduction at lateral boundaries, the aspect ratio of sides, the heater size, and the thickness of a working liquid layer.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
A. Kondrashov, E. Burkova,