Results 21 to 30 of about 6,434,349 (320)

Constricted channel flow with different cross-section shapes [PDF]

, 2017
Pressure driven steady flow through a uniform circular channel containing a constricted portion is a common problem considering physiological flows such as underlying human speech sound production. The influence of the constriction’s cross-section shape (
Gao, H., Luo, X.Y., Van Hirtum, A., Wu, B.   +3 more
core   +3 more sources

Newtonian and Non-Newtonian Pulsatile Flows through an Artery with Stenosis

The Journal of Engineering Research, 2017
The current study presents three-dimensional modeling and analysis of blood flow through artery stenosis under several variants of pulsatile flow to mimic the atherosclerosis artery disease.
Abdus Samad, A. Husain, M. Zunaid, A. Samad   +3 more
doaj   +1 more source

A novel roller pump for physiological flow [PDF]

Artificial Organs, 2020
AbstractHaving physiological correct flow waveforms is a key feature for experimental studies of blood flow, especially in the process of developing and testing a new medical device such as stent, mechanical heart valve, or any implantable medical device that involves circulation of blood through the device.
Albert Chong, Zhonghua Sun, Lennart van de Velde, Shirley Jansen, Michel Versluis, Michel M. P. J. Reijnen, Erik Groot Jebbink   +6 more
openaire   +3 more sources

Respiratory maneuvers in echocardiography: a review of clinical applications

Cardiovascular Ultrasound, 2009
During echocardiographic examination, respiration induces cyclic physiological changes of intracardiac haemodynamics, causing normal variations of the right and left ventricle Doppler inflows and outflows and physiological variation of extracardiac flows.
Beladan Carmen C, Ginghina Carmen, Iancu Madalina, Calin Andreea, Popescu Bogdan A   +4 more
doaj   +1 more source

Transport of inertial particles by Lagrangian coherent structures : application to predator-prey interaction in jellyfish feeding [PDF]

, 2009
We use a dynamical systems approach to identify coherent structures from often chaotic motions of inertial particles in open flows. We show that particle Lagrangian coherent structures (pLCS) act as boundaries between regions in which particles have ...
Dabiri, J. O., Peng, J.
core   +1 more source

AtCRY2 Negatively Regulates the Functions of AtANN2 and AtANN3 in Drought Tolerance by Affecting Their Subcellular Localization and Transmembrane Ca2+ Flow

Frontiers in Plant Science, 2021
Annexins are a multifunctional class of calcium-binding proteins in plants, and their physiological functions and regulation in response to drought stress remain to be elucidated. Here, we found that AtANN2 and AtANN3 conferred to drought tolerance under
Ting Liu, Ting Liu, Leyan Du, Qiushi Li, Qiushi Li, Jingda Kang, Qi Guo, Qi Guo, Shilin Wang, Shilin Wang   +9 more
doaj   +1 more source

LES of non-Newtonian physiological blood flow in a model of arterial stenosis [PDF]

, 2012
Large Eddy Simulation (LES) is performed to study the physiological pulsatile transition-to-turbulent non-Newtonian blood flow through a 3D model of arterial stenosis by using five different blood viscosity models: (i) Power-law, (ii) Carreau, (iii ...
Ahmed, Bate, Berger, Carreau, Casson, Cross, Fry, Fung, Gonzalez, Hron, Huang, Johnston, Ku, Ku, Lees, Loudon, M.C. Paul, M.M. Molla, Merrill, Milnor, Molla, Neofytou, Paul, Piomelli, Quemada, Smagorinsky, Stein, Sutera, Tu, Valencia, Walburn, Womersley   +31 more
core   +1 more source

The effects of luminal and trans-endothelial fluid flows on the extravasation and tissue invasion of tumor cells in a 3D in vitro microvascular platform

bioRxiv, 2020
Throughout the process of metastatic dissemination, tumor cells are continuously subjected to mechanical forces resulting from complex fluid flows due to changes in pressures in their local microenvironments.
Cynthia Hajal, L. Ibrahim, J. C. Serrano, G. Offeddu, R. Kamm   +4 more
semanticscholar   +1 more source

Understanding physiological and degenerative natural vision mechanisms to define contrast and contour operators. [PDF]

PLoS ONE, 2009
BACKGROUND:Dynamical systems like neural networks based on lateral inhibition have a large field of applications in image processing, robotics and morphogenesis modeling.
Jacques Demongeot, Yannick Fouquet, Muhammad Tayyab, Nicolas Vuillerme   +3 more
doaj   +1 more source

Inlet and Outlet Boundary Conditions and Uncertainty Quantification in Volumetric Lattice Boltzmann Method for Image-Based Computational Hemodynamics

Fluids, 2022
Inlet and outlet boundary conditions (BCs) play an important role in newly emerged image-based computational hemodynamics for blood flows in human arteries anatomically extracted from medical images.
Huidan Yu, Monsurul Khan, Hao Wu, Chunze Zhang, Xiaoping Du, Rou Chen, Xin Fang, Jianyun Long, Alan P. Sawchuk   +8 more
doaj   +1 more source