文献类型：期刊文献

中文题名：基于变换流体动力学的文丘里效应旋聚器的设计与非互易特性研究

英文题名：Venturi-effect rotating concentrators and nonreciprocity characteristics based on transformation hydrodynamics

作者：姚能智[1];王浩[1];王斌[1];王学生[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2022

卷号：71

期号：10

起止页码：209

中文期刊名：物理学报

外文期刊名：Acta Physica Sinica

收录：CSTPCD;;EI(收录号：20222312193211);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000808420900009)】；北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

语种：中文

中文关键词：文丘里效应;流动旋聚器;非互易性;变换流体动力学

外文关键词：Venturi effect;hydrodynamic rotating concentrator;nonreciprocity;transformation hydrodynamics

摘要：流动超材料与变换流体动力学的发展丰富了人们对于流体流动控制的方法.本文基于变换流体动力学,耦合流动旋转与放大功能,设计出了具有张量化黏度的流动旋聚器.从数值模拟层面验证了旋聚器可在蠕动流状态下同时实现对流速的放大和旋转功能.在旋聚器中心流域,流体流速被放大,呈现出文丘里效应;在旋聚器外部区域,流体流动状态不会因旋聚器的存在而受到干扰,保持原有的流动状态.除此之外,本文发现并解释了空间坐标变换的非互易性所造成的旋转滞后现象的本质.本文所研究内容扩展并优化了现有的流体流动聚集功能;提出了文丘里效应相关应用的一种新途径;为超材料的非互易坐标变换设计提供了新的思路.
The development of hydrodynamics metamaterials and transformation hydrodynamics has enriched the methods of fluid flow control.In the proposed study,coupling flow rotation and amplification functions,hydrodynamic rotating concentrators with tensorized viscosity are designed based on transformation hydrodynamics.Through numerical simulations,we have demonstrated that the rotating concentrators can simultaneously magnify and rotate the velocity in creeping flows.In the central area of the rotating concentrators,the fluid velocity is amplified,exhibiting the venturi effect;in the external area of the rotating concentrators,the flow state is not interfered with due to the presence of the rotating concentrators,maintaining the original flow state.Additionally,we discover and explain the mechanisms of the rotational hysteresis phenomena that are caused by the nonreciprocity of spatial coordinate transformations.The proposed studies 1) extend and optimize the traditional flow concentrators,2) raise new approaches for applications related to Venturi effects,and 3) shed light on the design of nonreciprocal coordinate transformations for metamaterials.