Article
Engineering, Chemical
Wei Deng, Ken-ichi Tsubota
Summary: A numerical simulation was conducted to study the blood flow behavior and the coupling of a renal vascular network and the myogenic response. The results showed that the myogenic response can regulate blood flow in the vascular network, with the early-branching subsystems reaching the regulated state first and the late-branching subsystems reaching it later. The asymmetric model exhibited differences among subsystems.
Article
Engineering, Biomedical
Wei Deng, Ken-ichi Tsubota
Summary: This study conducted a numerical simulation to investigate the factors influencing renal blood flow. The results showed that blood flow rate and pressure varied among different vessel branches and decreased with vessel diameter. The number and branching style of vessels were found to be important parameters in reproducing renal blood flow. The entire vascular network could generate small variations in physiological flow rate.
MEDICAL ENGINEERING & PHYSICS
(2022)
Article
Biology
S. Schoenborn, T. Lorenz, K. Kuo, D. F. Fletcher, M. A. Woodruff, S. Pirola, M. C. Allenby
Summary: Vascular compliance, both a cause and consequence of cardiovascular disease, is important in the patency of vascular grafts. However, studying the biomechanical effects of localized changes in compliance has been challenging due to limited medical imaging technologies and surgical simulation materials. To address this, a coupled silico-vitro platform was developed to validate numerical fluid-structure interaction results with physical prototypes. The results of this study provide insights into the mechanical behavior of arterial phantoms and have promising applications in studying diseases and optimizing vascular prostheses.
COMPUTERS IN BIOLOGY AND MEDICINE
(2023)
Article
Nanoscience & Nanotechnology
Amjad Ali, Attia Fatima, Zainab Bukhari, Hamayun Farooq, Zaheer Abbas
Summary: This article investigates heat transfer analysis in pulsating flow in a channel with multiple symmetric constrictions. The impact of various parameters on flow profiles is studied, with a focus on the variation of wall shear stress at different constriction locations.
Article
Mechanics
Hossein Darvish, Nasser Fatouraee, Malikeh Nabaei
Summary: The study focused on the impact of ischemic stroke in the circle of Willis, considering anatomical variations. Initial findings showed a significant change in blood flow rates due to ischemic stroke.
Article
Physics, Multidisciplinary
Gabriel Guyard, Frederic Restagno, Joshua D. McGraw
Summary: Hydrodynamic flows in compliant channels have significant implications in physiology and microfluidics. This study investigates the relaxation dynamics of thin and soft rectangular microfluidic channels and provides a complete description of the experimental results. The findings contribute to the understanding of elastohydrodynamic coupling and the time-dependent behavior of compliant channel networks.
PHYSICAL REVIEW LETTERS
(2022)
Article
Computer Science, Interdisciplinary Applications
Shila Alizadehghobadi, Hasan Biglari, Hanieh Niroomand-Oscuii, Meisam H. Matin
Summary: The fluid-structure interaction analysis of coronary bypasses using saphenous vein and thoracic artery grafts showed that wall shear stress was higher for saphenous vein grafts, while total deformation was greater for thoracic artery grafts. Additionally, venous grafts and lower stenosis degrees were found to have higher oscillatory shear index at anastomoses, indicating they may be more critical in terms of restenosis.
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING
(2021)
Article
Mechanics
Souvik Pabi, Mohd. Kaleem Khan, Sachin Kumar Jain, Ashis Kumar Sen, Abhishek Raj
Summary: This study investigates pulsatile blood flow through a deformable stenosed channel using an arbitrary Lagrangian-Eulerian fluid-structure interaction approach. The effects of different stenotic shapes, degrees of stenosis, and arterial wall stiffnesses on velocity profile, pressure and wall shear stress distribution, and wall deformation are explored. The results show that the severity of stenosis and artery stiffness affect flow velocity, wall shear stress, and pressure difference across the stenosed region. Different stenotic shapes have varying effects on pressure drop characteristics and plaque formation. Secondary vortices are formed downstream of the channel at lower heart beat rates, resulting in higher oscillatory shear index.
Article
Mathematical & Computational Biology
Nader El Khatib, Oualid Kafi, Diana Oliveira, Adelia Sequeira, Jorge Tiago
Summary: This article compares the effects of different atheromatous plaque material assumptions on hemodynamics and biomechanics within a patient-specific computational domain. The study aims to understand the pathophysiology of atherosclerosis by analyzing the impact of plaque characteristics on blood flow and mechanical stress. The findings provide insights into the physiological parameters and structural responses associated with atherosclerosis.
MATHEMATICAL MODELLING OF NATURAL PHENOMENA
(2023)
Review
Biology
Faiz Syed, Sahar Khan, Milan Toma
Summary: Fluid-structure interaction algorithms are used to simulate blood flow and mechanical responses in blood vessels, allowing for personalized treatment plans based on individual patients. These algorithms provide valuable insights into cardiovascular dynamics and can be used as a guidance tool for intervention procedures.
Article
Mechanics
Aditya Karthik Saravanakumar, K. Supradeepan, P. S. Gurugubelli
Summary: Research on energy generation from piezoelectric patches mounted on flexible flat plates has focused on the flapping dynamics, with limited understanding of multilayered structures. A quasi-monolithic formulation with exact interface tracking has been proposed to simulate fluid-multilayered structure interactions, and parametric simulations have been used to investigate the effects of different material properties on the flapping dynamics. The research shows distinct response regimes depending on the difference in elastic properties between layers, and explores the effects of structural density differences on the flapping dynamics of a two-layered plate.
Article
Engineering, Mechanical
D. Lopes, R. Agujetas, H. Puga, J. Teixeira, R. Lima, J. P. Alejo, C. Ferrera
Summary: This study compares the finite element and finite volume methods for simulating fluid-structure interaction in a stenosed artery, finding reasonable agreement between the predicted hemodynamics of both approaches. The finite volume method (Ansys) was shown to be more efficient in terms of computational time and memory requirements.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Multidisciplinary
Sohail Nadeem, Salman Akhtar, Anber Saleem, Nevzat Akkurt, Hassan Ali Ghazwani, Sayed M. Eldin
Summary: This research investigates the analysis of arterial blood flow through different stenotic regions. Four types of stenotic regions, including triangular, trapezoidal, overlapping (w-shape), and composite formations, are studied for the first time in numerical analysis. An elliptical cross-sectional artery is modeled using a cartesian coordinate system, and the governing partial differential equations are numerically solved with the Open-FOAM CFD software. The results show a high flow profile with minor disruptions near the origin of stenotic sections, and high pressure values near the sharp corners of stenotic regions. Expected irregularities in the flow profile are observed, typical of real-life stenosed artery blood flow problems.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Petroleum
Shaowen Mao, Zhuo Zhang, Troy Chun, Kan Wu
Summary: This paper utilized the MP-PIC method to simulate proppant transport among multiple fractures in horizontal wells and studied the mechanisms of uneven proppant placement, providing strategies for improvement. Sensitivity analysis revealed that optimizing proppant size and injection rate can mitigate the biased proppant distribution.
Article
Engineering, Multidisciplinary
Zahra Sadeghi Nogourani, As'ad Alizadeh, Hayder Mahmood Salman, Tariq J. Al-Musawi, Pooya Pasha, Muhammad Waqas, Davood Domiri Ganji
Summary: Cardiovascular diseases are a leading cause of death in today's society. This study analyzes and models blood flow in the coronary vessels, with particular focus on the vessels on the left side. Changes in hematocrit and blood viscosity are found to affect the pressure distribution and shear stress on the vessel walls. The research suggests that a flexible vessel model reduces pressure distribution and an increase in blood viscosity leads to a significant increase in wall shear stress.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Biomedical
Yuanming Luo, Ambroise Duprey, Stephane Avril, Jia Lu
ACTA BIOMATERIALIA
(2016)
Article
Engineering, Biomedical
Ambroise Duprey, Olfa Trabelsi, Marco Vola, Jean-Pierre Favre, Stephane Avril
ACTA BIOMATERIALIA
(2016)
Article
Biophysics
Matthew R. Bersi, Chiara Bellini, Paolo Di Achille, Jay D. Humphrey, Katia Genovese, Stephane Avril
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2016)
Article
Physics, Fluids & Plasmas
M. Quan Nguyen, Alexandre Delache, Serge Simoens, Wouter J. T. Bos, Mamoud El Hajem
PHYSICAL REVIEW FLUIDS
(2016)
Review
Mechanics
Yassine Saadlaoui, Eric Feulvarch, Alexandre Delache, Jean-Baptiste Leblond, Jean-Michel Bergheau
COMPTES RENDUS MECANIQUE
(2018)
Article
Environmental Sciences
Henri Lam, Alexandre Delache, Fabien S. Godeferd
Article
Mechanics
Haining Luo, Alexandre Delache, Serge Simoens
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2020)
Article
Mechanics
H. Lam, A. Delache, F. S. Godeferd
Summary: The study focuses on the strong stratification regime of stably stratified turbulence and the viscosity-affected stratified state, decomposing the three-dimensional velocity-density fields into internal gravity waves (IGWs) and eddy motion. Separate evolution equations for IGWs and eddies are established. At Re-b around 1, a significant exchange of energy from IGWs to eddies is observed, while for Re-b > 1, the dynamics of IGWs and eddies appear to be separate with no global energy exchange. The mixing due to eddies is found to be four times greater than that due to waves at the largest Re-b considered.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
J. Liu, M. Oberlack, Y. Wang, A. Delache, F. S. Godeferd
Summary: This study presents a theory of inertial wave focusing generated by a vertically oscillating slender torus immersed in a uniformly rotating fluid. The results show that the wave rays form a double cone symmetric about the plane on which the torus is located, and the waves focus at the two vertices of the double cone. The focusing effect becomes weaker with increasing friction effects.
Review
Chemistry, Multidisciplinary
Andre Mourato, Rodrigo Valente, Jose Xavier, Moises Brito, Stephane Avril, Jose Cesar de Sa, Antonio Tomas, Jose Fragata
Summary: This paper provides a comprehensive review of computational modelling and simulations of blood vessel interaction in aortic aneurysms and dissection. Although computational models can provide clinicians with additional data, they are not widely implemented in clinical practice due to low accuracy, lengthy reporting time, and lack of numerical validation.
APPLIED SCIENCES-BASEL
(2022)
Review
Medicine, General & Internal
Lucie Derycke, Stephane Avril, Antoine Millon
Summary: The endovascular technique is widely used in the first line treatment of complex aortic pathologies. The selection of a suitable stent-graft and the operator's experience play a crucial role in its clinical outcome. Numerical simulation provides a digital reproduction of endovascular interventions and can assist practitioners with decision making. This review discusses the basic principles and current literature of using numerical simulation for endovascular management of complex aortic diseases, and highlights its potential to revolutionize everyday clinical applications.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Physics, Fluids & Plasmas
Wesley Agoua, Benjamin Favier, Alexandre Delache, Antoine Briard, Wouter J. T. Bos
Summary: The study discusses the generation of helicity in a statistically homogeneous but anisotropic flow driven by buoyancy, and explains this phenomenon through a simple linear mechanism and simulations. It is found that the self-organized state displays dynamic reversals of the mean helicity sign.
Article
Engineering, Mechanical
Y. Saadlaoui, A. Delache, E. Feulvarch, J. B. Leblond, J. M. Bergheau
JOURNAL OF FLUIDS AND STRUCTURES
(2020)
Article
Physics, Fluids & Plasmas
Andrea Maffioli, Alexandre Delache, Fabien S. Godeferd
PHYSICAL REVIEW FLUIDS
(2020)
Article
Engineering, Biomedical
Olfa Trabelsi, Ambroise Duprey, Jean-Pierre Favre, Stephane Avril
ANNALS OF BIOMEDICAL ENGINEERING
(2016)