Flow bifurcation due to opposing buoyancy in two vertically connected open cavities

Yuguo Li; Pengcheng Xu; Hua Qian; Qi-Hong Deng; Jingyi Wu

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Flow bifurcation due to opposing buoyancy in two vertically connected open cavities

机译：由于在两个垂直连接的开放型腔中存在相反的浮力，导致分流

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A bifurcation behaviour of flows driven by opposing buoyancy in two vertically connected open cavities was found and investigated using flow visualization experiments, theoretical analysis and computational fluid dynamics simulations. In the theoretical analysis, the fluid in each cavity was assumed to be fully mixed. It was found that two stable fixed points exist for a certain range of strength ratios of the heat source/sink. Hysteresis phenomenon was found between the two stable steady flows. The simple theoretical analysis suggests that two Hopf bifurcations also occur. Both computational fluid dynamics simulations and flow visualization confirm the existence of two stable solutions.

机译：在两个垂直连接的开放型腔中，由反向浮力驱动的流的分叉行为被发现并使用流可视化实验，理论分析和计算流体动力学模拟进行了研究。在理论分析中，假定每个腔体中的流体完全混合。发现在热源/散热器的强度比的一定范围内存在两个稳定的固定点。在两个稳定的稳定流之间发现了滞后现象。简单的理论分析表明，还会发生两个Hopf分支。计算流体动力学仿真和流动可视化都证实了两个稳定解的存在。

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来源
《International Journal of Heat and Mass Transfer》 |2006年第20期|p.3298-3312|共15页
作者
Yuguo Li; Pengcheng Xu; Hua Qian; Qi-Hong Deng; Jingyi Wu;
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作者单位

Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类热力工程理论;热学;
关键词
buoyancy flows; hysteresis phenomenon; hopf bifurcation; open cavity; computational fluid dynamics; non-linear analysis;

机译：浮力流;滞后现象;霍夫分叉;开腔;计算流体力学;非线性分析;

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2. Mixed Convection Boundary-layer Flow of a Nanofluid Near Stagnation-point on a Vertical Plate with Effects of Buoyancy Assisting and Opposing Flows [J] . Hossein Tamim, Saeed Dinarvand, Reza Hosseini, Research journal of applied science, engineering and technology . 2013,第10期

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3. Mixed Convection Boundary-layer Flow of a Nanofluid Near Stagnation-point on a Vertical Plate with Effects of Buoyancy Assisting and Opposing Flows [J] . Hossein Tamim, Saeed Dinarvand, Reza Hosseini, Research journal of applied science, engineering and technology . 2013,第10期

机译：具有浮力辅助和反向流动作用的垂直平板上接近滞止点的纳米流体的混合对流边界层流动
4. FLOW TRANSITIONS AND BIFURCATIONS OF BUOYANCY-INDUCED FLOWS FROM AN ENCLOSED CYLINDRICAL HEAT SOURCE [C] . Diego Angeli, Mauro A. Corticelli, Arturo Pagano, ASME international heat transfer conference;IHTC14 . 2011

机译：封闭式圆柱热源中由浮力引起的流动的流动转换和分支
5. Experimental and numerical study of free convection in a vertical channel with opposing buoyancy forces. [D] . Roeleveld, Derek. 2013

机译：具有垂直浮力的垂直通道中自由对流的实验和数值研究。
6. Mathematical analysis of magnetohydrodynamic (MHD) flow of micropolar nanofluid under buoyancy effects past a vertical shrinking surface: dual solutions [O] . Liaquat Ali Lund, Zurni Omar, Ilyas Khan 2019

机译：通过垂直收缩表面的浮力作用下的微极性纳米流体的磁流体动力学（MHD）流动的数学分析：双重解决方案
7. Experimental and Numerical Study of Free Convection in a Vertical Channel with Opposing Buoyancy Forces [O] . Derek Roeleveld 2021

机译：相反浮力力的垂直通道中自由对流的实验性和数值研究

Flow bifurcation due to opposing buoyancy in two vertically connected open cavities

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