Turbulent natural convection of a confined flow in a cubic enclosure: Effect of transient boundary conditions

被引：2
作者：
Weppe, A. [1 ]
Moreau, F. [1 ]
Saury, D. [1 ]
机构：
[1] Univ Poitiers, Inst Pprime, CNRS, UPR 3346,ISAE ENSMA, BP 40109, F-86961 Chasseneuil, France
来源：
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2023年 / 142卷
关键词：
Natural convection; Heat transfer; Experimental study; DIFFERENTIALLY HEATED CAVITY; DIRECT NUMERICAL SIMULATIONS; TEMPERATURE-MEASUREMENTS; LAYER; AIR; VELOCITY; CHAOS;
D O I：
10.1016/j.icheatmasstransfer.2023.106637
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This paper presents the experimental study of a turbulent natural convection air flow occurring inside an enclosure with an inner block partially heated. Unsteady boundary conditions are applied on the heated face of the block. This allows to achieve boundary conditions and flow regimes that can be relevant for industrial un-steady heating or cooling purposes. The maximum Rayleigh number reached is equal to 1.98 x 109 which corresponds, for instance, to the flow regime encountered in the underhood of cars. For Rayleigh numbers from 0.25 x 109 to 1.98 x 109, a dynamical analysis of the flow is conducted and similarity properties of the ascendant boundary layer are highlighted.
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页数：8
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