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Formation of Multiple Vortices in a Confined Two-Fluid Swirling Flow
Journal of Engineering Thermophysics ( IF 2.4 ) Pub Date : 2021-12-15 , DOI: 10.1134/s1810232821040068
L. Carrión 1 , M. A. Herrada 2 , V. Shtern 3
Affiliation  

Abstract

This numerical study explains the formation of multiple circulation cells in a confined swirling two-fluid flow. Providing fine and nonintrusive mixing of ingredients, multiple vortices are beneficial for the growth of tissue culture in aerial bioreactors. A convenient model of bioreactor is a sealed vertical cylindrical container filled with air and liquid. Rotation of the bottom disk drives the circulation of both fluids. Our study reveals that as the rotation intensifies, at least ten circulation cells develop: six in the lower fluid and four in the upper fluid. This steady axisymmetric multi-cell flow exists in some range of the rotation speed. There arises shear-layer instability as the rotation speed significantly exceeds this range. Therefore, such multi-cell flow might have applications in bioreactors where the rotation speed must be moderate for avoidance of destruction of tissue.



中文翻译:

受限二流体旋流中多个涡流的形成

摘要

这项数值研究解释了在受限的旋流两流体流中形成多个循环单元的原因。提供精细和非侵入性的成分混合,多个涡流有利于空中生物反应器中组织培养的生长。一个方便的生物反应器模型是一个密封的垂直圆柱形容器,里面装满了空气和液体。底部圆盘的旋转驱动两种流体的循环。我们的研究表明,随着旋转的加剧,至少​​会形成十个循环细胞:六个在下部流体中,四个在上部流体中。这种稳定的轴对称多细胞流存在于某些转速范围内。当旋转速度显着超过这个范围时,就会出现剪切层的不稳定性。所以,

更新日期:2021-12-16
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