Three-dimensional modeling of flow and deformation in idealized mild and moderate arterial vessels. Issue 13 (2nd October 2016)

• Record Type: Journal Article
• Authors: Gu, Xi; Yeoh, Guan Heng; Timchenko, Victoria
• Is Part Of: Computer methods in biomechanics and biomedical engineering. Volume 19:Issue 13(2016)
• Page Start: 1395
• Page End: 1408
• Publication Date: 2016-10-02
• Subjects: Pulsatile flow -- large eddy simulation -- transition to turbulence -- mild stenosis -- moderate stenosis; Biomechanics -- Data processing -- Periodicals; Biomedical engineering -- Periodicals; Biomechanics -- Periodicals; Biomedical Engineering -- methods -- Periodicals; Computing Methodologies -- Periodicals; 612.7
• DOI: 10.1080/10255842.2016.1145211
• Languages: English
• ISSNs: 1025-5842

Abstract

Abstract: Three-dimensional numerical calculations of mild and moderate stenosed blood vessels have been performed. Large eddy simulation through a dynamic subgrid scale Smagorinsky model is applied to model the transitional and turbulent pulsatile flow. For the compliant stenosed model, fluid-structure interaction is realized through a two-way coupling between the fluid flow and the deforming vessel through the change in the external diameter due to the increment of circumferential pressure via a novel moving boundary approach. Model predictions compare very well against measured and numerical data for the centerline velocities, thickness of the flow separation zones and radial wall displacements.