The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON BIOLOGY AND BIOMEDICINE
Transactions ID Number: 53-640
Full Name: Roland Gårdhagen
Position: Ph.D. Candidate
Age: ON
Sex: Male
Address: Linköping University, Dept. of Management and engineering, SE-581 83 Linköping
Country: SWEDEN
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E-mail address: roland.gardhagen@liu.se
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Title of the Paper: Large Eddy Simulation of Stenotic Flow for Wall Shear Stress Estimation - Validation and Application
Authors as they appear in the Paper: Roland Gårdhagen, Jonas Lantz, Fredrik Carlsson, Matts Karlsson
Email addresses of all the authors: roland.gardhagen@liu.se, jonas.lantz@liu.se, fredrik.carlsson@fsdynamics.se, matts.karlsson@liu.se
Number of paper pages: 15
Abstract: Turbulent flow in the cardiovascular system may increase the risk for severe arterial disease. This work addresses the feasibility of Large Eddy Simulation (LES) using a general purpose code as a tool for assessment of cardiovascular flow and investigates Wall Shear Stress WSS) in steady as well as pulsating turbulent pipe flow. Poiseuille flow was specified at the inlet, and with a suitable ammount of perturbations at the inlet it was possible to predict experimental data. The extent of the recirculation zone was affected by the inlet disturbances, and magnitude as well as direction of the WSS vector varied significantly at the reattachment point. For the pulsating flow, WSS shows a complex pattern with different spatial and temporal variation along the pipe. The wall shear stress gradient was calculated on the entire post-stenotic surface and each component in the gradient was investigated. The off-diagonal components in the gradient are usually assumed to be s!
mall, but here they were found to be on the same order of magnitude as the diagonal terms. This work demonstrates the need for a scale resolving simulation technique to accurately model cardiovascular flows.
Keywords: Turbulence, Large eddy simulation, Cardiovascular flow, Wall shear stress
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How Did you learn about congress: CFD, Biofluidmechanics, turbulence, Cardiovascular flow
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