Journal ArticleDOI
Modeling complex boundaries using an external force field on fixed Cartesian grids in large-eddy simulations
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TLDR
In this paper, a method to perform large-eddy simulations around complex boundaries on fixed Cartesian grids is presented, which is applicable to boundaries of arbitrary shape, does not involve special treatments, and allows the accurate imposition of the desired boundary conditions.About:
This article is published in Computers & Fluids.The article was published on 2004-03-01. It has received 472 citations till now. The article focuses on the topics: Regular grid & Computational fluid dynamics.read more
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Immersed boundary methods
Rajat Mittal,Gianluca Iaccarino +1 more
TL;DR: The term immersed boundary (IB) method is used to encompass all such methods that simulate viscous flows with immersed (or embedded) boundaries on grids that do not conform to the shape of these boundaries.
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A versatile sharp interface immersed boundary method for incompressible flows with complex boundaries
TL;DR: A sharp interface immersed boundary method for simulating incompressible viscous flow past three-dimensional immersed bodies is described, with special emphasis on the immersed boundary treatment for stationary and moving boundaries.
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An embedded-boundary formulation for large-eddy simulation of turbulent flows interacting with moving boundaries
Jianming Yang,Elias Balaras +1 more
TL;DR: A non-boundary-conforming formulation for simulating complex turbulent flows with dynamically moving boundaries on fixed Cartesian grids is proposed and the concept of field-extension is also introduced to treat the points emerging from a moving solid body to the fluid.
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A hybrid Cartesian/immersed boundary method for simulating flows with 3D, geometrically complex, moving bodies
TL;DR: In this paper, a numerical method is developed for solving the Navier-Stokes equations in Cartesian domains containing immersed boundaries of arbitrary geometrical complexity moving with prescribed kinematics.
References
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Journal ArticleDOI
A dynamic subgrid‐scale eddy viscosity model
TL;DR: In this article, a new eddy viscosity model is presented which alleviates many of the drawbacks of the existing subgrid-scale stress models, such as the inability to represent correctly with a single universal constant different turbulent fields in rotating or sheared flows, near solid walls, or in transitional regimes.
Journal ArticleDOI
Application of a Fractional-Step Method to Incompressible Navier-Stokes Equations
John Kim,Parviz Moin +1 more
TL;DR: In this paper, a numerical method for computing three-dimensional, time-dependent incompressible flows is presented based on a fractional-step, or time-splitting, scheme in conjunction with the approximate-factorization technique.
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Numerical analysis of blood flow in the heart
TL;DR: In this article, the authors extended previous work on the solution of the Navier-Stokes equations in the presence of moving immersed boundaries which interact with the fluid and introduced an improved numerical representation of the δ-function.
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Flow patterns around heart valves: A numerical method
TL;DR: In this paper, the Navier-Stokes equations on a rectangular domain are applied to the simulation of flow around the natural mitral valve of a human heart valve, where the boundary forces are of order h − 1, and because they are sensitive to small changes in boundary configuration, they tend to produce numerical instability.
Eddies Stream, and Convergence Zones in Turbulent Flows
TL;DR: In this article, a set of objective criteria were found which describe regions in which the streamlines circulate, converge, or diverge, and form high streams of high velocity flow.