Mixed convection heat transfer correlations in shallow rectangular cavities with single and double-lid driven boundaries
| Autor: | Mourad Kaddiri, A. Louaraychi, M. Lamsaadi, Mohammed Hasnaoui, H. El Harfi, A. Raji, M. Naïmi |
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| Rok vydání: | 2019 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Finite volume method Mechanical Engineering 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics symbols.namesake Heat flux Combined forced and natural convection 0103 physical sciences Heat transfer Newtonian fluid symbols Lid driven Boussinesq approximation (water waves) Rayleigh scattering 0210 nano-technology |
| Zdroj: | International Journal of Heat and Mass Transfer. 132:394-406 |
| ISSN: | 0017-9310 |
| Popis: | Mixed convection in single and double-lid driven horizontal rectangular cavities filled with a Newtonian fluid and subjected to uniform heat flux along their vertical short sides is studied numerically and analytically. The finite volume method with the SIMPLER algorithm is used to solve the full governing equations for which the Boussinesq approximation is adopted while the analytical approach lies on the parallel flow assumption, valid in the case of shallow enclosures. A good agreement between the two approaches is observed within the explored ranges of Peclet and Rayleigh numbers. The effects of such parameters on the flow and heat transfer characteristics are analyzed for both kinds of driven cavities. The zones characterizing the dominance of natural and forced convections as well as when the two phenomena compete (mixed convection) are delineated. It is found that the transition from one dominated regime to another depends on the ratio Ra/Pe3. |
| Databáze: | OpenAIRE |
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