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Quasi-PML for waves in cylindrical coordinates

✍ Scribed by Q. H. Liu; J. Q. He

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
252 KB
Volume
19
Category
Article
ISSN
0895-2477

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✦ Synopsis

We pro¨e that the straightforward extension of Berenger's ( ) original perfectly matched layer PML is not reflectionless at a cylindrical interface in the continuum limit. A quasi-PLM is de¨eloped as an ( ) absorbing boundary condition ABC for the finite-difference timedomain method in cylindrical coordinates. For three-dimensional problems, this quasi-PML requires only ten equations, instead of 12 equations in the best true PML formulations. With a satisfactory absorption le¨el, it is simpler, and requires about 20% less computer memory than the true

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