A Lagrangian investigation of the flow inside the left ventricle

被引：24

作者：

Espa, S. ^{[1
]}

Badas, M. G. ^{[2
]}

Fortini, S. ^{[1
]}

Querzoli, G. ^{[2
]}

Cenedese, A. ^{[1
]}

机构：

[1] Univ Roma La Sapienza, Dipartimento Ingn Civile Edile & Ambientale, I-00184 Rome, Italy

[2] Univ Cagliari, Dipartimento Ingn Terr, I-90123 Cagliari, Italy

来源：

EUROPEAN JOURNAL OF MECHANICS B-FLUIDS | 2012年 / 35卷

关键词：

Left ventricle; Experimental model; Lagrangian statistics; DIASTOLIC HEART-FAILURE; COHERENT STRUCTURES; DISPERSION; TURBULENCE; DIFFUSION; TRANSPORT; MODEL;

D O I：

10.1016/j.euromechflu.2012.01.015

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A laboratory model reproducing the main characteristics of the heart pump was used to investigate the flow in a ventricle model during a cardiac cycle. Velocity fields were measured both in Lagrangian and Eulerian frames of reference by using image analysis. In particular, by imaging the flow field from two orthogonal views, we were able to verify the asymmetric structure of the ventricular filling. The flow features were investigated considering Lagrangian based methodologies: Finite Time and Finite Size Lyapunov Exponents were evaluated to assess Lagrangian Coherent Structure time evolution and flow dispersion properties, respectively. These quantities have proven to be powerful tools to elucidate the complex dynamics associated with the intraventricular flow. (c) 2012 Published by Elsevier Masson SAS.

引用

页码：9 / 19

页数：11

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