TY - GEN
T1 - Transient free convection in a rectangular water-filled enclosure
AU - Dubovsky, Vadim
AU - Kugler, Yonatan
AU - Maoz, Nimrod
AU - Letan, Ruth
N1 - Publisher Copyright:
Copyright © 2014 by ASME.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Transient laminar free convection in a water-filled rectangular enclosure has been studied experimentally and numerically. The study aimed at gaining an insight into the physical phenomena, illustrated by the flow patterns and the temperature stratification, from the initial stage of a homogeneous fluid through the transient evolving process. The experimental setup consisted of two rectangular water-filled enclosures: the smaller one contained a heat source and was centrally immersed in the larger one. Dye was injected for visualization of the rising boundary layer over the inner container walls, and the accumulation of the colored layers in the upper zone of the outer container. Simultaneously, the temperature measurements, by thermocouples and an infra-red camera, displayed the formation of a stratified structure. The numerical study was conducted three-dimensionally, using the Fluent 6.3 software. The stratified temperature field, observed experimentally, was well-predicted by the numerical model. The heat transfer rates and the transient averaged Nusselt numbers were compared with the data in the literature. The current, constant power input yielded Nu/Ra0.25∼0.7 in the range of Fo/Ra0.25 = 0-3.
AB - Transient laminar free convection in a water-filled rectangular enclosure has been studied experimentally and numerically. The study aimed at gaining an insight into the physical phenomena, illustrated by the flow patterns and the temperature stratification, from the initial stage of a homogeneous fluid through the transient evolving process. The experimental setup consisted of two rectangular water-filled enclosures: the smaller one contained a heat source and was centrally immersed in the larger one. Dye was injected for visualization of the rising boundary layer over the inner container walls, and the accumulation of the colored layers in the upper zone of the outer container. Simultaneously, the temperature measurements, by thermocouples and an infra-red camera, displayed the formation of a stratified structure. The numerical study was conducted three-dimensionally, using the Fluent 6.3 software. The stratified temperature field, observed experimentally, was well-predicted by the numerical model. The heat transfer rates and the transient averaged Nusselt numbers were compared with the data in the literature. The current, constant power input yielded Nu/Ra0.25∼0.7 in the range of Fo/Ra0.25 = 0-3.
KW - Experimental
KW - Free convection
KW - Rectangular enclosure
KW - Simulation
KW - Transient
KW - Water
UR - http://www.scopus.com/inward/record.url?scp=84916917464&partnerID=8YFLogxK
U2 - 10.1115/ESDA2014-20256
DO - 10.1115/ESDA2014-20256
M3 - Conference contribution
AN - SCOPUS:84916917464
T3 - ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis, ESDA 2014
BT - Engineering Systems; Heat Transfer and Thermal Engineering; Materials and Tribology; Mechatronics; Robotics
PB - Web Portal ASME (American Society of Mechanical Engineers)
T2 - ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis, ESDA 2014
Y2 - 25 July 2014 through 27 July 2014
ER -