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Large Eddy Simulati...
Large Eddy Simulation of Stenotic Flow for Wall Shear Stress Estimation - Validation and Application
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- Gårdhagen, Roland (author)
- Linköpings universitet,Mekanisk värmeteori och strömningslära,Tekniska högskolan
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- Lantz, Jonas (author)
- Linköpings universitet,Mekanisk värmeteori och strömningslära,Tekniska högskolan
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- Carlsson, Fredric (author)
- FS Dynamics Sweden AB, Gothenburg
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- Karlsson, Matts (author)
- Linköpings universitet,Mekanisk värmeteori och strömningslära,Tekniska högskolan
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(creator_code:org_t)
- 2011
- 2011
- English.
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In: WSEAS Transactions on Biology and Biomedicine. - 1109-9518. ; 8:3, s. 86-101
- Related links:
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http://www.worldses....
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Turbulent flow in the cardiovascular system may increase the risk for severe arterial disease. This workaddresses the feasibility of Large Eddy Simulation (LES) using a general purpose code as a tool for assessmentof cardiovascular flow and investigates Wall Shear Stress (WSS) in steady as well as pulsating turbulent pipeflow. Poiseuille flow was specified at the inlet, and with a suitable ammount of perturbations at the inlet it waspossible 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 thepulsating flow, WSS shows a complex pattern with different spatial and temporal variation along the pipe. Thewall shear stress gradient was calculated on the entire post-stenotic surface and each component in the gradientwas investigated. The off-diagonal components in the gradient are usually assumed to be small, but here they werefound to be on the same order of magnitude as the diagonal terms. This work demonstrates the need for a scaleresolving simulation technique to accurately model cardiovascular flows.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Keyword
- Turbulence
- Large Eddy Simulation
- Cardiovascular Flow
- Wall Shear Stress
Publication and Content Type
- ref (subject category)
- art (subject category)
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