TY - JOUR
T1 - STEADY, TWO-DIMENSIONAL, NATURAL CONVECTION IN RECTANGULAR ENCLOSURES WITH DIFFERENTLY HEATED WALLS.
AU - Chen, Kang S.
AU - Ho, J. R.
AU - Humphrey, Joseph A.C.
PY - 1986
Y1 - 1986
N2 - Numerical results are presented for steady natural convection in two-dimensional rectangular enclosures in which the side walls, top wall and bottom wall are at uniform temperatures. Rayleigh numbers ranging from 10**4 to 10**7 and aspect ratios of 1 and 1. 5 were investigated for fluid with Pr equals 7. The top wall was modeled as an impermeable rigid surface or an impermeable free-moving boundary. The calculations reveal two flow regions. In the upper part of the enclosure two large counter-rotating cells appear, separated by a descending plume of fluid. Near the bottom wall, the flow is almost motionless and stably stratified. The temperature in the central portion of the enclosure is almost uniform due to mixing by the recirculating cells. A temperature inversion occurs near the top wall and is particularly noticeable at high Rayleigh number. At high Rayleigh number, the flow breaks up into smaller cells. The result is for each main recirculation region to develop a secondary counter-rotating eddy within it.
AB - Numerical results are presented for steady natural convection in two-dimensional rectangular enclosures in which the side walls, top wall and bottom wall are at uniform temperatures. Rayleigh numbers ranging from 10**4 to 10**7 and aspect ratios of 1 and 1. 5 were investigated for fluid with Pr equals 7. The top wall was modeled as an impermeable rigid surface or an impermeable free-moving boundary. The calculations reveal two flow regions. In the upper part of the enclosure two large counter-rotating cells appear, separated by a descending plume of fluid. Near the bottom wall, the flow is almost motionless and stably stratified. The temperature in the central portion of the enclosure is almost uniform due to mixing by the recirculating cells. A temperature inversion occurs near the top wall and is particularly noticeable at high Rayleigh number. At high Rayleigh number, the flow breaks up into smaller cells. The result is for each main recirculation region to develop a secondary counter-rotating eddy within it.
UR - http://www.scopus.com/inward/record.url?scp=37949058309&partnerID=8YFLogxK
M3 - 會議論文
AN - SCOPUS:37949058309
SN - 0402-1215
JO - American Society of Mechanical Engineers (Paper)
JF - American Society of Mechanical Engineers (Paper)
ER -