Bottom center drain circular tanks in which water is injected tangentially to the tank wall are widely used in aquaculture. However, a torus-shaped region about the center drain can develop into an irrotational zone that generates low velocities and poor mixing. Many works have been devoted to improving tank hydraulics by making good use of the water flow pattern. However, mathematics-friendly methods, such as the statistical optimization method, which is widely used in science and engineering, are rarely used in aquaculture tank designing. This work focuses on the minimization of the low velocity zone in a bottom center drain tank based on experimental planning and computational fluid dynamics. Model validation was carried out by comparison with measurements. The results show that the low velocity zone can be reduced measurebly by the proposed method.

中文翻译：

---

一种减小底部中心排水圆形养殖池低水流速区的方法

在水产养殖中广泛使用底部中心排水圆形水箱，其中水与水箱壁相切。然而，围绕中心排水管的环面形区域可能会发展成为产生低速度和不良混合的无旋区。许多工作致力于通过充分利用水流模式来改进水箱液压系统。然而，数学友好的方法，如科学和工程中广泛使用的统计优化方法，在水产养殖池设计中很少使用。这项工作的重点是基于实验计划和计算流体动力学最小化底部中心排水罐中的低速区。通过与测量值进行比较来进行模型验证。