A Lagrangian criterion of unsteady flow separation for two-dimensional periodic flows

被引：0
|
作者：
Shuaibin HAN [1 ]
Shuhai ZHANG [1 ]
Hanxin ZHANG [2 ]
机构：
[1] State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center
[2] China Aerodynamics Research and Development Center
来源：
Applied Mathematics and Mechanics(English Edition) | 2018年 / 39卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Lagrangian criterion; unsteady flow separation; finite-time Lyapunov exponent(FTLE); two-dimensional periodic flow;
D O I：
暂无
中图分类号：
O35 [流体力学];
学科分类号：
080103 ; 080704 ;
摘要：
The present paper proposes a Lagrangian criterion of unsteady flow separation for two-dimensional periodic flows based on the principle of weighted averaging zero skin-friction given by Haller(HALLER, G. Exact theory of unsteady separation for two-dimensional flows. Journal of Fluid Mechanics, 512, 257–311(2004)). By analyzing the distribution of the finite-time Lyapunov exponent(FTLE) along the no-slip wall, it can be found that the periodic separation takes place at the point of the zero FTLE.This new criterion is verified with an analytical solution of the separation bubble and a numerical simulation of lid-driven cavity flows.
引用
收藏
页码：1007 / 1018
页数：12
相关论文
共 50 条
  • [1] A Lagrangian criterion of unsteady flow separation for two-dimensional periodic flows
    Han, Shuaibin
    Zhang, Shuhai
    Zhang, Hanxin
    APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION, 2018, 39 (07) : 1007 - 1018
  • [2] A Lagrangian criterion of unsteady flow separation for two-dimensional periodic flows
    Shuaibin Han
    Shuhai Zhang
    Hanxin Zhang
    Applied Mathematics and Mechanics, 2018, 39 : 1007 - 1018
  • [3] Exact theory of unsteady separation for two-dimensional flows
    Haller, G
    JOURNAL OF FLUID MECHANICS, 2004, 512 : 257 - 311
  • [4] Automated detection of coherent Lagrangian vortices in two-dimensional unsteady flows
    Karrasch, Daniel
    Huhn, Florian
    Haller, George
    PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2015, 471 (2173):
  • [5] TWO-DIMENSIONAL UNSTEADY VISCOUS FLOWS
    Shu, Jian-Jun
    PROCEEDINGS OF THE ASME 36TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, 2017, VOL 7B, 2017,
  • [6] An unsteady two-dimensional vortex method for the flow separation over a flapping wing
    Wu, Yue
    Xie, Changchuan
    Yang, Chao
    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING, 2023, 237 (02) : 343 - 356
  • [7] Lagrangian singularities of steady two-dimensional flow
    Pauls, W
    Matsumoto, T
    GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS, 2005, 99 (01): : 61 - 75
  • [8] Two-dimensional ultrasound Doppler velocimeter for flow mapping of unsteady liquid metal flows
    Franke, S.
    Lieske, H.
    Fischer, A.
    Buettner, L.
    Czarske, J.
    Raebiger, D.
    Eckert, S.
    ULTRASONICS, 2013, 53 (03) : 691 - 700
  • [9] A meshless solution of two-dimensional unsteady flow
    Kovarik, K.
    Muzik, J.
    Mahmood, M. S.
    ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS, 2012, 36 (05) : 738 - 743
  • [10] Clustering criterion for inertial particles in two-dimensional time-periodic and three-dimensional steady flows
    Sapsis, Themistoklis
    Haller, George
    CHAOS, 2010, 20 (01)
12345