Scattering of SH Waves by a Circular Hole in Two-Dimensional Inhomogeneous Medium with Density Variation

We perform two-dimensional relativistic magnetohydrodynamic simulations of a mildly relativistic shock propagating through an inhomogeneous medium. We show that the postshock region becomes turbulent owing to preshock density inhomogeneity, and the magnetic field is strongly amplified due to the stretching and folding of field lines in the turbulent velocity field. The amplified magnetic field evolves into a filamentary structure in two-dimensional simulations. The magnetic energy spectrum is flatter than the Kolmogorov spectrum and indicates that the so-called small-scale dynamo is occurring in the postshock region. We also find that the amplitude of magnetic-field amplification depends on the direction of the mean preshock magnetic field.

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Two-Dimensional Stress Analysis of Single-Lap Adhesive Joints Filled with Circular Hole Defects in the Adhesives Subjected to Tensile Shear Loads.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A ◽

10.1299/kikaia.61.1986 ◽

1995 ◽

Vol 61 (589) ◽

pp. 1986-1993

Author(s):

Toshiyuki Sawa ◽

Katsuyuki Nakano

Keyword(s):

Stress Analysis ◽

Circular Hole ◽

Adhesive Joints ◽

Two Dimensional ◽

Tensile Shear ◽

Shear Loads ◽

Hole Defects

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Two-dimensional scattering of SH waves due to a discontinuity in bedrock

Earthquake Engineering & Structural Dynamics ◽

10.1002/(sici)1096-9845(199908)28:8<841::aid-eqe843>3.0.co;2-r ◽

1999 ◽

Vol 28 (8) ◽

pp. 841-855 ◽

Cited By ~ 6

Author(s):

Ernest Heymsfield

Keyword(s):

Two Dimensional ◽

Sh Waves

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Two‐dimensional acoustic modeling by a hybrid method

Geophysics ◽

10.1190/1.1441998 ◽

1985 ◽

Vol 50 (8) ◽

pp. 1273-1284 ◽

Cited By ~ 10

Author(s):

V. Shtivelman

Keyword(s):

Wave Propagation ◽

Wave Field ◽

Inhomogeneous Medium ◽

Hybrid Method ◽

Wave Scattering ◽

Acoustic Modeling ◽

Two Dimensional ◽

Numerical Techniques ◽

Numerical Examples ◽

Field Computation

This paper follows previous work (Shtivelman, 1984) in which a hybrid method for wave‐field computation was developed. The method combines analytical and numerical techniques and is based upon separation of the processes of wave scattering and wave propagation. The method is further developed and improved; particularly, it is generalized for the case of an inhomogeneous medium above scattering objects (provided the inhomogeneity is weak, i.e., the effects of scattering can be neglected) and is represented by a simpler and more convenient form. Several numerical examples illustrating application of the method to the problems of two‐dimensional acoustic modeling are considered.

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