| 発表言語 |
英語
|
| 開催日 |
2013年12月11日 16時30分
|
| 終了日 |
2013年12月11日 17時30分
|
| 開催場所 | 京都大学数理解析研究所110号室 |
| セミナー名 | 談話会 |
| タイトル |
Toward Efficient Global High-Resolution Models: Positive Definite Discontinuous Galerkin Schemes with Spectral Accuracy |
| 分野 |
代数
幾何
解析
その他
|
| 講演者名 | Dale Durran |
| 講演者所属 | RIMS / University of Washington |
| 概要 | The latest increases in computing power bring the possibility of replacing inaccurate parameterizations of deep cumulus clouds currently in global weather forecast models with calculations based more directly on the fundamental equations of fluid dynamics, thereby eliminating one of the greatest weaknesses in such models. This improvement will require changes in the equations used in global atmospheric models, the grid structures used to represent atmospheric variables, and the algorithms used to solve those equations. A range of possible approaches will be briefly reviewed. Particular emphasis will be given to the advantages and weakness of Discontinuous Galerkin (DG) schemes for high resolution atmospheric modeling. A new efficient DG method is presented that preserves non-negative scalar fields without reducing the effective order of accuracy of the method. Test cases are discussed involving one- and two-dimensional flows. |
| 備考 | 16:00-16:30 tea @ lobby
◆ 専門家以外の方を対象とした易しいお話をお願いしております。
◆ 多数の教員および学生の方の参加をお待ちしております。 |
| リンク | http://www.kurims.kyoto-u.ac.jp/ja/seminar/danwakai.html |