Natural convection along a vertical porous surface

Autor:	Kenichi Yokota, Takashi Masuoka, Yasuyuki Takatsu, Yasushi Hashimoto
Rok vydání:	1997
Předmět:	Fluid Flow and Transfer Processes Surface (mathematics) Convection Materials science Natural convection Turbulence business.industry Rayleigh number Mechanics Physics::Fluid Dynamics Boundary layer symbols.namesake Optics Heat transfer symbols Rayleigh scattering business
Zdroj:	Heat Transfer - Japanese Research. 26:385-397
ISSN:	1520-6556 0096-0802
DOI:	10.1002/(sici)1520-6556(1997)26:6<385::aid-htj4>3.0.co;2-s
Popis:	This paper describes an experimental study on natural convection along a vertical porous surface consisting of a bank of parallel plates with constant gaps. Compared with a smooth surface, the heat transfer for a porous surface with streamwise gaps is somewhat enhanced owing to enthalpy transport due to flow within the gaps and that with spanwise gaps is enhanced due to the leading- and trailing-edge effects of solid-phase micro surfaces. Observations show that no clear transition to turbulent flow occurs at a critical Rayleigh number for a smooth surface and that the boundary layer oscillates with a dominant frequency at higher Rayleigh numbers. The dominant frequency for a porous surface is nearly the same as that for a smooth surface. This fact obviously indicates that the oscillations of natural convection are almost independent of the porous structure of the heating surface and are mainly dependent on the behavior of the outer boundary laver.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::46cea19770daf909a42d214e1c44b300 https://doi.org/10.1002/(sici)1520-6556(1997)26:6<385::aid-htj4>3.0.co Zobrazit plný text záznamu Plný text