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TECHNICAL PAPERS

The Characteristics-Based Matching (CBM) Method for Compressible Flow With Moving Boundaries and Interfaces

[+] Author and Article Information
R. R. Nourgaliev, T. N. Dinh, T. G. Theofanous

Center for Risk Studies and Safety, University of California, Santa Barbara, 6740 Cortona Drive, CA 93117, USA

J. Fluids Eng 126(4), 586-604 (Sep 10, 2004) (19 pages) doi:10.1115/1.1778713 History: Received May 27, 2003; Revised November 08, 2003; Online September 10, 2004
Copyright © 2004 by ASME
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References

Figures

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Test 8: Density field computed by a) the CBM-based approach (VSR3/WENO5/LLFRA scheme); and b) the SOG on unstructured grid 33
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Test 9: Dynamics of the moving particle’s Mach number, based on the initial upstream and downstream flow conditions in a laboratory frame
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Test 9: Dynamics of the density field. Density is colored and extruded normally to the computational plane, in accordance to its value. The boundary (“zero-level”) is also shown. a) t=2⋅10−3; b) t=6⋅10−3; c) t=1⋅10−2; d) t=1.4⋅10−2; e) t=3.9⋅10−2; and f) t=4.9⋅10−2.
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On the formulation of the one-sided boundary of the CBM treatment
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On treatment of the RNs, BLNs and GNs
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On the treatment of “patch” boundaries of the computational domain
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Test 1: Comparison of the VSR-based time discretization strategy to the Runge-Kutta TVD scheme
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Test 1: Effect of the physical time discretization on resolution of discontinuities
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Test 2: Study of the over/under-heating for a shock reflection from a stationary solid boundary
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Test 7: Propagation of the initially planar shock wave (Msh=2.1) through the curved channel. a) interferogram from the experiment; b) computed density field, using the CBM-based approach.
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Test 7: Resolution of the λ-structure by a) the CBM-based approach (VSR3/WENO5/LLFRA scheme); b) the second-order Godunov (SOG) scheme on a body-fitted structured grid 31; and c) the SOG on unstructured grid 33
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Test 8: Dynamics of the density field. a) t=4.5⋅10−3; b) t=8.1⋅10−3; c) t=1.32⋅10−2; d) t=1.56⋅10−2; e) t=1.68⋅10−2; f) t=2.22⋅10−2.
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Test 5: Effect of the patch boundary treatment on the steady-state density field
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Test 5: Dynamics of the density distribution for a Sod’s test in two spatial dimensions. Shock tube orientation relatively to the grid lines is 20 deg. Density is colored and extruded normally to the computational plane, in accordance to its value. The boundary (“zero-level”) is also shown. Grid size is 2002 and σt=1.0. Normal vector at the boundary of the domain is set to be ‘tangential to zero-level’.
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Test 6: Dynamics of the density field. Density is colored and extruded, in accordance to its value. The boundary (“zero-level”) is also shown.
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Test 7, 8, 9: On the formulation of the curved channel geometry (tests 7, 8, and 9) and cylindrical particle’s trajectory (test 9)
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Test 7: Dynamics of the density field. a) t=1.05⋅10−2; b) t=1.55⋅10−2; c) t=2.05⋅10−2; d) t=2.55⋅10−2.
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Test 3: Study of the over/under-heating for a moving solid boundary (compression mode)
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Test 4: Study of the over/under-heating for a moving solid boundary (rarefaction mode)
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Test 4: Study of the over/under-heating for a moving solid boundary (rarefaction mode), contd
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Test 5: Density profile at the centerline of the shock tube

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