A Tutorial for Computational Fluid Dynamics Applied to Multilayer Flow Modulator

Abstract

Multi-layer flow-modulating stent is a new advanced technology suitable for complex aortic aneurysms. Computational fluid dynamics is a mechanical bioengineering field for analyzing fluid flow, heat transfer, and associated phenomena, using computer-based simulation. Computational fluid analysis can be useful for student to understand the physical phenomenon that are involved in hemodynamic of blood flow through single layer or multilayer stents and according to geometry of blood vessel and as one of the help tool to choose what type of stent is more suitable for a particular case. In absence of a stent, aneurysm wall are sheared by turbulence flow. Multilayer stent reduces the vortex and the flow is closer to a laminar flow. The pressure in an inlet section becomes more uniform and the flow is improved. The study of the multilayer stent can help students to understand much better the clinical situation. The software tool is construct as a toolbox that call open source computational fluid dynamic solver. The GUI (Graphic User Interface) present an option to see the inlet velocity for different section of blood vessel along with option that set the hemodynamic of blood. The user has the possibility to adjust some geometrical parameters and also few possibility of visualization of dynamic flow. The models are validated by using a multiphysics CAD tool and the results of comparison are acceptable for didactic use of the proposed tool. The tool has been constructed in a modular way, so the next developments can be added as simple connection via a button to a new GUI and access to libraries of the main program.