Liquid mixing in channel with laminar uniaxial flow is inefficient, and the mixing channel length required for diffusive mixing is immensely large. In the attempt to enhance liquid mixing, this study presents computational evaluation of mixing performance of tri-fin configuration in a T-mixer. Two parameters, that is, transverse spacing (S_T) and width (L_w) of the upstream fin, are studied to evaluate the geometrical scaling effect of the tri-fin configuration. It is shown that tri-fin unit with S_T/H = 0.2 and L_w/H = 0.2 yields superior overall mixing performance, amongst the geometrical parameters investigated. For flow at low Reynolds number (Re ≤ 1), 20 periodic units of tri-fin are sufficient to achieve maximum enhancement with 29% reduction of mixing efficiency length L_M = 99%. It is also shown that there exists a progressive mixing enhancement with increasing number of tri-fin periodic units employed. Taking into consideration of the pumping power limitation, it would be ideal to employ tri-fin feature to improve liquid mixing for fluids with high Schmidt number, flowing at low Reynolds number.

中文翻译：

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含三翅片T型混合器中液体混合的数值评估

层流单轴流通道内液体混合效率低下，扩散混合所需的混合通道长度极大。为了加强液体混合，本研究提出了 T 型混合器中三翅片结构混合性能的计算评估。两个参数，即，横向间距（小号_Ť）和宽度（大号_瓦特的上游翅片），进行了研究以评估三鳍结构的几何缩放效果。结果表明，具有S _T / H  = 0.2 和L _w / H 的三翅片单元 在所研究的几何参数中，= 0.2 产生卓越的整体混合性能。对于低雷诺数 (Re ≤ 1) 的流动，20 个周期单位的三翅片足以在混合效率长度L _{M  = 99%}减少 29% 的情况下实现最大增强。还表明，随着采用的三鳍周期单元数量的增加，存在渐进的混合增强。考虑到泵送功率的限制，采用三翅片特征来改善高施密特数流体的液体混合，在低雷诺数下流动是理想的。