Journal ArticleDOI
An immersed-boundary finite-volume method for simulations of flow in complex geometries
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In this paper, a new immersed-boundary method for simulating flows over or inside complex geometries is developed by introducing a mass source/sink as well as a momentum forcing.About:
This article is published in Journal of Computational Physics.The article was published on 2001-07-01. It has received 1090 citations till now. The article focuses on the topics: Immersed boundary method & Mixed boundary condition.read more
Citations
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Secondary instability in the near-wake past two tandem square cylinders
TL;DR: In this paper, a parametric analysis has been carried out to detect the onset of the secondary instability in the laminar flow past two identical square cylinders in tandem, and three distinct patterns of base flow are found depending on the gap, and distinctive modes of secondary instability are identified for each pattern of the base flow.
Journal ArticleDOI
A new incompressible Navier-Stokes solver combining Fourier pseudo-spectral and immersed boundary methods
TL;DR: In this article, a new numerical methodology combining Fourier pseudo-spectral and immersed boundary methods is developed for fluid flow prob- lems governed by the incompressible Navier-Stokes equations.
Journal ArticleDOI
An improved direct-forcing immersed boundary method with inward retraction of Lagrangian points for simulation of particle-laden flows
TL;DR: It turns out the improved method not only provides better results for the drag force but also predicts the flow field more accurately, suitable for simulating large-scale fluid–particle systems such as fluidized bed, which are computationally expensive.
Dissertation
Numerical simulation of thermal fluid-structure interaction
TL;DR: In this article, the authors developed and then implemented a framework for numerical simulation of fully coupled thermal fluid structure interaction, a phenomenon which occurs in a large set of engineering problems, and an important aspect of this work is the optimization of the numerical procedure.
Journal ArticleDOI
An immersed boundary method for incompressible flows using volume of body function
TL;DR: In this article, a simple and effective immersed boundary method using volume of body (VOB) function is implemented on unstructured Cartesian meshes and the flow solver is a second-order accurate implicit pressure-correction method for the incompressible Navier-Stokes equations.
References
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Journal ArticleDOI
On the identification of a vortex
Jinhee Jeong,Fazle Hussain +1 more
TL;DR: In this article, the authors propose a definition of vortex in an incompressible flow in terms of the eigenvalues of the symmetric tensor, which captures the pressure minimum in a plane perpendicular to the vortex axis at high Reynolds numbers, and also accurately defines vortex cores at low Reynolds numbers.
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.
Journal ArticleDOI
Combined Immersed-Boundary Finite-Difference Methods for Three-Dimensional Complex Flow Simulations
TL;DR: In this paper, a second-order accurate, highly efficient method is developed for simulating unsteady three-dimensional incompressible flows in complex geometries, which is achieved by using boundary body forces that allow the imposition of the boundary conditions on a given surface not coinciding with the computational grid.
Journal ArticleDOI
Modeling a no-slip flow boundary with an external force field
TL;DR: In this paper, the Navier-Stokes equations permit the presence of an externally imposed body force that may vary in space and time, and the velocity is used to iteratively determine the desired value.
Journal ArticleDOI
Oblique and Parallel Modes of Vortex Shedding in the Wake of a Circular Cylinder at Low Reynolds Numbers
TL;DR: In this article, it was shown that the Strouhal discontinuity is not due to any of the previously proposed mechanisms, but instead is caused by a transition from one oblique shedding mode to another oblique mode.