SciELO - Scientific Electronic Library Online

vol.33 número1Pre-treatment of a refractory gold sulfide ore by means of acidithiobacilli cellsContact angle hysteresis effects on the relative permeability of gas and condensate in three-dimensional pore networks índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




  • No hay articulos citadosCitado por SciELO

Links relacionados

  • No hay articulos similaresSimilares en SciELO


Latin American applied research

versión impresa ISSN 0327-0793


KOZANOGLU, Bulent  y  CRUZ, Juan A.. Transient natural convection in a horizontal fluid layer, with a blackbody bottom; heated from above by radiation. Lat. Am. appl. res. [online]. 2003, vol.33, n.1, pp.39-44. ISSN 0327-0793.

Transient natural convection in a horizontal fluid layer, with a blackbody bottom, heated from above by radiation was studied experimentally and numerically. The heat flux which reaches to the bottom is absorbed by the black surface and reheats the fluid layer from the bottom, creating an adverse temperature gradient at the bottom of the fluid layer similar to the one observed in the classical Rayleigh-Bénard problem. A mathematical model was developed and governing differential equations were numerically solved. The predictions of the model were found to be in an acceptable agreement with the experimental temperature distributions obtained in a laboratory scale pool by holographic interferometer techniques. Experimentally and numerically calculated heat convection coefficients were correlated in terms of Nusselt and Rayleigh numbers and compared with a literature correlation. It is concluded that this problem is very similar to the classical Rayleigh-Bénard problem of a horizontal fluid layer heated from below.

Palabras clave : Transient natural convection; Rayleigh-Bénard problem; thermal instability; holographic interferometer.

        · texto en Inglés     · Inglés ( pdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons