The effect of source Reynolds number on the rise height of a fountain
The effect of source Reynolds number on the rise height of a fountain
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DOI：
10.1063/1.4914470
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发表时间：
2015-04
影响因子：
4.6
通讯作者：
H. Burridge;A. Mistry;G. Hunt
中科院分区：
文献类型：
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作者：
H. Burridge;A. Mistry;G. Hunt
本文的重点是建立源雷诺数的效果，Re 0，Boussinesq混相喷泉的平均上升高度，从而范围Re 0的上升高度是独立的Re 0。我们目前的实验结果，盐水喷泉跨越源雷诺数为15 ≤ Re 0 ≤ 4000和源弗劳德数为0.3 ≤ Fr 0 ≤ 40。我们提供了源雷诺数的阈值，即，高于该值的喷泉上升高度可被视为与Re 0无关。对于低于这些阈值的雷诺数，喷泉上升高度随着Re 0的减小而增加-与Lin和Armfield [“弱喷泉的雷诺数和普朗特数依赖性”，Comput. 31，379-389（2003）]。在更低的Re 0，我们表明，上升高度达到最大值，并进一步减少Re 0减少上升高度达到与菲利普等人，[“在可混溶液体中的负浮力射流的穿透”，物理学。流体.
The focus of this paper is to establish the effect of source Reynolds number, Re0, on the mean rise heights of Boussinesq miscible fountains and thereby the range of Re0 for which rise heights are independent of Re0. We present results from experiments on aqueous-saline fountains spanning source Reynolds numbers of 15 ≤ Re0 ≤ 4000 and source Froude numbers of 0.3 ≤ Fr0 ≤ 40. We provide threshold values for the source Reynolds number, i.e., values above which fountain rise height may be regarded as independent of Re0. For Reynolds numbers immediately beneath these threshold values, the fountain rise height increases as Re0 decreases—in agreement with Lin and Armfield [“The Reynolds and Prandtl number dependence of weak fountains,” Comput. Mech. 31, 379–389 (2003)]. At even lower Re0, we show that the rise heights reach a maximum and that further decreases in Re0 decrease the rise height attained—in agreement with Phillipe et al., [“Penetration of a negatively buoyant jet in a miscible liquid,” Phys. Fluids...