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REVIEW ARTICLES

Immersed boundary technique for turbulent flow simulations

[+] Author and Article Information
Gianluca Iaccarino

Center for Turbulence Research, Stanford University, CA 94305-3030; jops@ctr.stanford.edu

Roberto Verzicco

DIMeG and CEMeC, Politecnico di Bari, Via Re David, 200, 70125, Bari, Italy; verzicco@poliba.it

Appl. Mech. Rev 56(3), 331-347 (May 02, 2003) (17 pages) doi:10.1115/1.1563627 History: Online May 02, 2003
Copyright © 2003 by ASME
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References

Figures

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Streamwise velocity component profiles compared with the experimental data
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Contour plots of azimuthal vorticity and velocity vectors projected onto 2D cutting planes for a 3D case with azimuthal perturbation at Re=2,000, 65×65×151 (θ×r×z) grid, dynamic Smagorinsky subgrid-scale turbulence model. Vorticity scale solid lines (–) indicate positive values, dotted lines ([[dotted_line]]) indicate negative values, and the increment between adjacent isocontours is Δω=±2.5V̄p/b:a) t=π/2, azimuthal vorticity; b) t=π/2, projected velocity vectors, meridional plane; c) t=π/2, projected velocity vectors, 15 mm below the head; d) t=π, azimuthal vorticity; e) t=π, projected velocity vectors, meridional plane; and f) t=π, projected velocity vectors, 15 mm below the head.
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Radial profiles of averaged axial velocity components at different locations in the cylinder. Symbols: Experiments 58, Solid Line: LES simulation; Dashed line: RANS simulations
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Tank configuration and computational grid in a meridional plane (only one every six grid-points are shown)
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Contour plots of azimuthally averaged velocity vectors: a), instantaneous velocity magnitude, b) and turbulent kinetic energy, c) in a meridional plane crossing a blade
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Radial profiles of averaged velocity components in the middle of the tank. Symbols: Experiments 60, Solid line: Present LES; Dashed line: RANS simulations 61
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Road-vehicle configuration and computational grid in the symmetry plane (only one every four grid-points are shown)
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STL model of a hammer-head shark and streamtraces of the computed flow field at Reynolds number of 1,000
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STL model of a Porsche 911 and computed pressure distribution on the surface at Reynolds number of 100,000
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Cartesian mesh with local mesh refinement: dashed lines represent grid lines that are partially deleted
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Example of the automatic grid refinement strategy for immersed boundaries: Computational grids (top), heavyside tagging function (middle), and numerical derivative of the tagging function (bottom); a to d represent successive levels of refinement
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Flow simulation around the FPC letters at Reynolds number 10,000
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Mean streamwise velocity on the center line of the wake of a circular cylinder at Re=3900: □ experimental results by Lourenco and Shih 50, ⋄ experimental results by Ong and Wallace 51, –dns on a 49×129×193 grid, [[dashed_line]]les with a dynamic SGS model on a 49×129×193 grid
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Mean (left) and rms (right) cross-stream profiles of streamwise velocity in the wake of the cylinder. Sections are sampled at 1.06, 1.54, and 2.02 cylinder diameters downstream. The symbols are the results by Kravchenko and Moin 52, –dns on a 49×129×193 grid, [[dashed_line]]les with a dynamic SGS model on a 49×129×193 grid.
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Sketch of the wavy channel problem with the location of the measured velocity profiles
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Computational grids for the wavy channel RANS simulations: a) body fitted grid, b) Cartesian mesh, and c) locally refined Cartesian mesh
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Streamwise velocity component at Re=8000 (dashed line represent negative values): a) body fitted grid, b) Cartesian mesh, and c) locally refined Cartesian mesh
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Reconstruction stencils in the vicinity of the immersed boundary: a) Linear one-dimensional scheme, b) linear multi-dimensional scheme, and c) quadratic multi-dimensional scheme
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Streamwise velocity profiles in the wake for the square-back configuration. Symbols: Experiments 62; Dotted line: LES at Re=20,000; Solid line: LES at Re=100,000.
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Flow patterns in the symmetry plane superimposed to contours of time-averaged streamwise velocity: Re=20,000 a) Baseline square-back geometry, b) Square-back with base plates, c) Boat-tail base

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