Atherosclerosis affects the arterial blood vessels causing stenosis because of which the artery hardens resulting in loss of elasticity in the affected region. In this paper, we present: an approach to model the fluid-structure interaction through such an atherosclerosis affected region of the artery, The blood is assumed as an incompressible Newtonian viscous fluid, and the vessel wall was treated as a thick-walled, incompressible and isotropic material with uniform mechanical properties. The numerical simulation has been studied in the context of The Navier-Stokes equations for an interaction with an elastic solid. The study of fluid flow and wall motion was initially carried out separately, Discretized forms of the transformed wall and flow equations, which are coupled through the boundary conditions at their interface, are obtained by control volume method and simultaneously to study the effects of wall deformability, solutions are obtained for both rigid and elastic walls.The results indicate that deformability of the wall causes an increase in the time average of pressure drop, but a decrease in the maximum wall shear stress. Displacement and stress distributions in the wall are presented.
In this study, the effect of the jet control width and its momentum coefficient on the flow over a NACA0012 airfoil is investigated numerically for a Reynolds number equal to 2.88x10 6. The jet is placed at 15% of the chord length from the leading edge on the upper surface of the airfoil. The calculation was carried out using the solver URANS with the (k-ε) RNG model. Simulation results for an incompressible fully turbulent flow, varying the jet width from 0.5 to 3.5 percent of the chord length with jet control angle β equal to 45 0 , the lift to drag ratio increase. However, an optimum jet width of 2% of the profile chord, leads to better performance. I is also be observed, when the momentum coefficient rises, the lift coefficient increases reaching about 86% improvement (for better improvement by 85.93%) and the stall angle is delayed from 16 0 to 22 0. This parametric study led to select the control parameters for the best aerodynamic performance of the airfoil.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.