| Presentation | 2014-01-27 On boundary condition of CE-FDTD method Naoki MARUTA, Osamu YAMASHITA, Takao TSUCHIYA, Yukio IWAYA, Makoto OTANI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this study, the density variation is implemented in the compact-explicit finite difference-time domain (CE-FDTD) method, which is a high-accuracy version of the FDTD method. For the density variation, the formulation is started from the continuity equation and the equation of motion, because the density does not appear in the wave equation explicitly. It is shown that the density variation can be implemented in the CE-FDTD method. Some demonstrations are carried out for the case of the plane wave propagation and the spherical wave propagation. As the results, it is found that the numerical accuracy depends on the Courant number, and that the large-Courant number scheme is more advantageous because the cut-off frequency becomes high. Especially, the interpolated wide band (IWB) scheme is most suitable for the waveform analysis because the numerical dispersion error hardly occurs due to the high cut-off frequency. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | CE-FDTD method / IWB method / graphics processing unit / density variation |
| Paper # | US2013-90,EA2013-103 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2014/1/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | On boundary condition of CE-FDTD method |
| Sub Title (in English) | |
| Keyword(1) | CE-FDTD method |
| Keyword(2) | IWB method |
| Keyword(3) | graphics processing unit |
| Keyword(4) | density variation |
| 1st Author's Name | Naoki MARUTA |
| 1st Author's Affiliation | Faculty of Science and Engineering, Doshisha University() |
| 2nd Author's Name | Osamu YAMASHITA |
| 2nd Author's Affiliation | Faculty of Science and Engineering, Doshisha University |
| 3rd Author's Name | Takao TSUCHIYA |
| 3rd Author's Affiliation | Faculty of Science and Engineering, Doshisha University |
| 4th Author's Name | Yukio IWAYA |
| 4th Author's Affiliation | Faculty of Engineering, Tohoku Gakuin University |
| 5th Author's Name | Makoto OTANI |
| 5th Author's Affiliation | Faculty of Engineering, Shinshu University |
| Date | 2014-01-27 |
| Paper # | US2013-90,EA2013-103 |
| Volume (vol) | vol.113 |
| Number (no) | 413 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |