کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
762332 | 1462740 | 2012 | 15 صفحه PDF | دانلود رایگان |
In this paper we propose to study open boundary conditions for incompressible Navier–Stokes equations, in the framework of velocity-correction methods. The standard way to enforce this type of boundary condition is described, followed by an adaptation of the one we proposed in [36] that provides higher pressure and velocity convergence rates in space and time for pressure-correction schemes. These two methods are illustrated with a numerical test with both finite volume and spectral Legendre methods. We conclude with three physical simulations: first with the flow over a backward-facing step, secondly, we study, in a geometry where a bifurcation takes place, the influence of Reynolds number on the laminar flow structure, and lastly, we verify the solution obtained for the unsteady flow around a square cylinder.
► We implement open boundary conditions for the velocity correction schemes.
► We illustrate a second-order accuracy in time on a manufactured test case.
► We study the Reynolds number effect on the flow structure in a bifurcated tube.
► We verify the solution obtained for the unsteady flow around a square cylinder.
Journal: Computers & Fluids - Volume 70, 30 November 2012, Pages 29–43