کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7174634 | 1465331 | 2014 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimal control in blood flow simulations
ترجمه فارسی عنوان
کنترل مطلوب در شبیه سازی جریان خون
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کلمات کلیدی
کنترل بهینه، ویسکوزیته برشی برشی غیر نیوتنی، جمع آوری داده ها،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
Blood flow simulations can be improved by integrating known data into the numerical simulations. Data Assimilation techniques based on a variational approach play an important role in this issue. We propose a non-linear optimal control problem to reconstruct the blood flow profile from partial observations of known data in idealized 2D stenosed vessels. The wall shear stress is included in the cost function, which is considered as an important indicator for medical purposes. To simplify, blood flow is assumed as an homogeneous fluid with non-Newtonian shear-thinning viscosity. Using a Discretize then Optimize (DO) approach, we solve the non-linear optimal control problem and we propose a weighted cost function that accurately recovers both the velocity and the wall shear stress profiles. The robustness of such cost function is tested with respect to different velocity profiles and degrees of stenosis. The filtering effect of the method is also confirmed. We conclude that this approach can be successfully used in the 2D case.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Non-Linear Mechanics - Volume 64, September 2014, Pages 57-69
Journal: International Journal of Non-Linear Mechanics - Volume 64, September 2014, Pages 57-69
نویسندگان
Telma Guerra, Jorge Tiago, Adélia Sequeira,