%0 Journal Article
%T On the Fluid Transport In Disk Starting Process by Lagrangian Coherent Structures<br>用拉格朗日相关结构研究圆盘启动过程的流体输运
%A YANG An-long
%A JIA Lai-bing
%A YIN Xie-zhen
%A <br>杨岸龙
%A 贾来兵
%A 尹协振
%J 实验力学
%D 2012
%I 
%X Velocity distribution and vorticity distribution around vortex circulation field generated by disk starting were measured by using particle imaging velocimetry (PIV). The finite-time Lyapunov exponent (FTLE) field and the Lagrangian coherent structure (LCS) of the vortex flow were computed. Based on FTLE and LCS, following the tracks of a piece of fluid particles, fluid transport process of the vortex circulation field was analyzed. During the formation process of disk vortex circulation field, the fluid was found to be divided into three parts by the disk and the repelling-LCS. A vorticity-flux window was found through which the fluid with vorticity flows into the vortex core continuously and the unsteady boundary of the vortex ring which consists of the r-LCS leeward, the disk and the flux window was identified.
%K finit-time Lyapunov exponent field
%K Lagrangian coherent structure
%K disk start vortex ring
%K particle imaging velocimetry (PIV)
%K fluid transport
%K boundary of vortex ring<br>Lyapunov指数场
%K Lagrangian相关结构
%K 圆盘起动涡环
%K 粒子成像速度计
%K 流体输运
%K 涡环边界
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=49067A0A0D864088C06A84AACB51A5B2&aid=E4EB2AADE1AB1F60216E27609AE0CE50&yid=99E9153A83D4CB11&vid=DB817633AA4F79B9&iid=B31275AF3241DB2D&sid=2E4E3741E8FB64E9&eid=21A4BC96BDC43D33&journal_id=1001-4888&journal_name=实验力学&referenced_num=0&reference_num=0