Combined MRI and CFD analysis of fully developed steady and pulsatile laminar flow through a bend
Combined MRI and CFD analysis of fully developed steady and pulsatile laminar flow through a bend
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对经过弯管的完全发展的稳定和脉动层流进行 MRI 和 CFD 组合分析
DOI：
10.1002/jmri.1880080523
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发表时间：
1998
影响因子：
4.4
通讯作者：
BASc D. N. Firmin PhD
中科院分区：
文献类型：
--
作者：
M. B. D. S. J. Weston;P. M. B. D. N. B. Wood;ACGl CEng;MRAeS G MIMechE;DPhil Tabor;BASc A. D. Gosman PhD;BASc D. N. Firmin PhD
结合MR和计算流体动力学（CFD）研究了一个简单的模拟实验室流动装置，该装置由180°弯道组成，具有直入口和直出口部分。目的是研究MRI链接CFD模拟在体内应用的潜力。为此，实验设置了稳定层流和脉动层流两种条件，以Reynolds数和Dean数以及Womersley脉动参数代表人体主动脉静息流量。以管道几何图像和进入弯道处的速度图像作为边界条件，进行CFD流动模拟。稳态和脉动工况下的CFD结果与弯道出口处的速度图像相比都很好。此外，还从模拟中提取了压力和壁剪应力等其他信息，这些信息要么无法通过MRI充分测量，要么根本无法测量。总的来说，结果足够有希望进行后续的体内研究。
A combined MR and computational fluid dynamics (CFD) study is made of flow in a simple phantom laboratory flow rig consisting of a 180° bend with straight entry and exit sections. The aim was to investigate the potential of the use of MRI‐linked CFD simulations for in vivo use. To this end, the experiment was set up for both steady and pulsatile laminar flow conditions, with Reynolds and Dean numbers and Womersley pulsatility parameter representative of resting flow in the human aorta. The geometrical images of the pipe and the velocity images at entry to the bend were used as boundary conditions for CFD simulations of the flow. The CFD results for both steady and pulsatile cases compared favorably with velocity images obtained at exit from the bend. Additional information such as pressure and wall shear stress, which either could not be measured adequately via MRI, or could not be measured at all, was also extracted from the simulation. Overall, the results were sufficiently promising to justify persuing subsequent in vivo studies.
使用磁共振成像的非定常流动模型研究。
DOI：
10.1115/1.2891132
发表时间：
1990
期刊：
Journal of biomechanical engineering
影响因子：
--
作者：
Fei,DY;Kraft,KA;Fatouros,PP
通讯作者：
Fatouros,PP