On steady subsonic flows with non-trivial vorticities.
本論文討論了具有非平凡旋度的穩態亞音速流體的適定性問題。 === 首先,我們研究了通過無限長週期管道的二維亞音速流禮。當管道某一週期位置伯努利函數擾動很小,且質量數介於與適當的範圍時,有且僅有唯一的亞音速流禮。特別地,對於伯努利函數為常值的情形,我們還通過結構緊性的方法證明了亞音速-音速流體的存在性。此時,質量數可以達到一臨界值。謝春景和辛周平在處理二維司壓歐拉方程時曾引入了一個重要的處理方法一一流函數表達式。然而,對於週期流體的問題,伯努利函數和流函數的相互關係是無法事先確定的。為此,我們建立了一個關於流函數的非線性映射。該映射的不動點給出了相應歐拉方程的解。 === 其次,對於二維亞音速流...
Other Authors: | Chen, Chao |
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Format: | Others |
Language: | English Chinese |
Published: |
2012
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Subjects: | |
Online Access: | http://library.cuhk.edu.hk/record=b5549569 http://repository.lib.cuhk.edu.hk/en/item/cuhk-328288 |
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