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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Buoyancy-induced flow and heat transfer in multilayered cavities with openings
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Buoyancy-induced flow and heat transfer in multilayered cavities with openings

机译：带开口的多层腔中浮力引起的流动和传热

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Purpose - The purpose of this study is to investigate the flow interaction between the cavities and its impact on heat transfer. The role of the openings is examined and three strategies are considered: one opening, two openings on single side and two openings on double sides. Design/methodology/approach - A two-dimensional laminar natural convection heat transfer in multilayered open cavities was numerically investigated. The governing equations in primitive variables were discretized by the finite volume method and solved by SIMPLE algorithm. Findings - The results show that for the cavities with one opening, the flow in the cavities is connected with each other. The exhaust hot fluid from the lower cavity was entrained into the upper cavities by thermal buoyancy and hence the heat transfer in the upper cavities was decreased because of thermal accumulation. Two openings on the single side could strengthen the flow interaction between the cavities and then enhance the heat transfer. However, the double-sided openings eliminated the flow interaction between the cavities and thus the fluid flow and heat transfer characteristics in all cavities are independent. It was concluded that the flow interaction between the multilayered open cavities has an importance effect on the heat transfer in the cavities. Originality/value - The flow interaction between the multilayered open cavities was illustrated. The effect of flow interaction on the heat transfer in the cavities was investigated. The role of openings in the flow interaction and heat transfer in cavities was explored The cavity below affects above cavity for the openings on single side. No interaction exists between the cavities with openings on double sides.
机译：目的-本研究的目的是研究型腔之间的流动相互作用及其对热传递的影响。检查了开口的作用，并考虑了三种策略：一个开口，两个单侧开口和两个双侧开口。设计/方法/方法-对多层开放腔中的二维层流自然对流换热进行了数值研究。通过有限体积法离散原始变量中的控制方程，并通过SIMPLE算法求解。结果-结果显示，对于具有一个开口的型腔，型腔中的流动相互连通。来自下部腔室的排出的热流体通过热浮力被夹带进入上部腔室，因此，由于热蓄积，上部腔室中的热传递降低。单侧的两个开口可以增强型腔之间的流动相互作用，从而增强热传递。然而，双面开口消除了空腔之间的流动相互作用，因此所有空腔中的流体流动和传热特性是独立的。结论是，多层开放腔之间的流动相互作用对腔中的热传递具有重要影响。原创性/价值-说明了多层开放型腔之间的流动相互作用。研究了流体相互作用对型腔内传热的影响。探索了开口在型腔中流动相互作用和传热中的作用。下面的型腔会影响单侧开口的上型腔。在具有双侧开口的空腔之间不存在相互作用。

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