FREE-CONVECTION EXPERIMENTS IN WATER AND DEUTERATED MIXTURES AT TEMPERATURES INCLUDING THE DENSITY MAXIMA

被引：8

作者：

ANSELMI, C

DEPAZ, M

MARCIANO, A

PILO, M

SONNINO, G

机构：

[1] DIAPARTIMENTO FIS,VIA DODECANESO 33,I-16146 GENOA,ITALY

[2] UNIV SALERNO,FAC SCI,DIPARTIMENTO FIS TEOR & SUE METODOL SCI APPL,BARONISSI,ITALY

[3] UNIV LIBRE BRUXELLES,SERV CHIM PHYS,B-1050 BRUSSELS,BELGIUM

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1990年 / 33卷 / 11期

关键词：

D O I：

10.1016/0017-9310(90)90009-J

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An apparatus designed to perform free convection experiments in cylindrical liquid samples under strictly controlled boundary conditions is described. Convection experiments are carried out by measuring at the centre of the sample temperature vs time, as monitored by a thermocouple and a computer on-line device. The system water-deuterated water has been investigated in temperature ranges including the density maxima of the samples and compared, only in the case of pure water, with theory. Previously observed anomalies of the convective behaviour in this range are confirmed in the form of typical 'plateaux' and thoroughly examined to provide new information about the density maximum of isotopic mixtures. A new effect of a faster cooling appears, near the maximum density, when the boundary temperature is brusquely increased.

引用

页码：2519 / 2524

页数：6

共 10 条

[1]

Chandrasekhar S., 1961, HYDRODYNAMIC HYDROMA

[2]

CODEGONE C, 1939, ACCAD SCI TORINO ATT, V75, P167

[3] GENERAL-THEORY OF A CONVECTIVE NUCLEUS OF WATER IN A NONSTEADY STATE AND UNDER NONLINEAR CONDITIONS AT TEMPERATURE RANGES THAT INCLUDE THE DENSITY MAXIMUM [J].