{"id":709496,"date":"2024-10-29T00:31:35","date_gmt":"2024-10-28T23:31:35","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=709496"},"modified":"2024-10-29T00:31:35","modified_gmt":"2024-10-28T23:31:35","slug":"hieu-ve-bat-on-dinh-kelvin-helmholtz","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/hieu-ve-bat-on-dinh-kelvin-helmholtz\/","title":{"rendered":"Hi\u1ec3u v\u1ec1 B\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz"},"content":{"rendered":"<p class=\"sidekick\">Hi\u1ec3u v\u1ec1 B\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz: T\u00ecm hi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, nguy\u00ean nh\u00e2n v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u00f3 trong qu\u00e1 tr\u00ecnh l\u01b0u ch\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/hieu_ve_bat_on_dinh_kelvin-helmholtz.png\" alt=\"Hi\u1ec3u v\u1ec1 B\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Hi\u1ec3u v\u1ec1 B\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz<\/h2>\n<p>B\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng x\u1ea3y ra khi c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch t\u1ed1c \u0111\u1ed9 gi\u1eefa hai l\u1edbp ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed c\u00f3 m\u1eadt \u0111\u1ed9 kh\u00e1c nhau. \u0110\u00e2y l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong l\u0129nh v\u1ef1c nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc v\u00e0 kh\u00ed \u0111\u1ed9ng h\u1ecdc, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c quan s\u00e1t trong nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng t\u1ef1 nhi\u00ean t\u1eeb kh\u00ed quy\u1ec3n Tr\u00e1i \u0110\u1ea5t \u0111\u1ebfn c\u00e1c \u0111\u00e1m m\u00e2y trong kh\u00f4ng gian.<\/p>\n<h2>Nguy\u00ean l\u00fd c\u01a1 b\u1ea3n<\/h2>\n<p>Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean theo hai nh\u00e0 khoa h\u1ecdc Lord Kelvin v\u00e0 Hermann von Helmholtz, nh\u1eefng ng\u01b0\u1eddi \u0111\u00e3 nghi\u00ean c\u1ee9u s\u00e2u v\u1ec1 hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y. Nguy\u00ean l\u00fd ch\u00ednh c\u1ee7a b\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz d\u1ef1a tr\u00ean s\u1ef1 ch\u00eanh l\u1ec7ch t\u1ed1c \u0111\u1ed9 gi\u1eefa hai l\u1edbp ch\u1ea5t kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng kh\u00e1c nhau v\u1ec1 m\u1eadt \u0111\u1ed9. Khi t\u1ed1c \u0111\u1ed9 c\u1ee7a m\u1ed9t l\u1edbp nhanh h\u01a1n l\u1edbp kia, s\u1ef1 ch\u00eanh l\u1ec7ch n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c s\u00f3ng b\u1ea5t \u1ed5n \u0111\u1ecbnh \u1edf ranh gi\u1edbi gi\u1eefa hai l\u1edbp.<\/p>\n<h2>C\u00f4ng th\u1ee9c v\u00e0 \u0111i\u1ec1u ki\u1ec7n ph\u00e1t tri\u1ec3n b\u1ea5t \u1ed5n \u0111\u1ecbnh<\/h2>\n<p>\u0110i\u1ec1u ki\u1ec7n \u0111\u1ec3 b\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 qua s\u1ed1 Reynolds (Re) v\u00e0 s\u1ed1 Froude (Fr). C\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ea7n thi\u1ebft c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng ph\u01b0\u01a1ng tr\u00ecnh:<\/p>\n<p>\nRe = \\frac{\\rho VL}{\\mu}\n<\/p>\n<p>\nFr = \\frac{V}{\\sqrt{gL}}\n<\/p>\n<p>\nTrong \u0111\u00f3:<\/p>\n<ul>\n<li>\u03c1: m\u1eadt \u0111\u1ed9 c\u1ee7a ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed<\/li>\n<li>V: v\u1eadn t\u1ed1c c\u1ee7a d\u00f2ng<\/li>\n<li>L: chi\u1ec1u d\u00e0i \u0111\u1eb7c tr\u01b0ng<\/li>\n<li>\u03bc: \u0111\u1ed9 nh\u1edbt<\/li>\n<li>g: gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng<\/li>\n<\/ul>\n<h2>\u1ee8ng d\u1ee5ng v\u00e0 quan s\u00e1t<\/h2>\n<p>B\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz \u0111\u01b0\u1ee3c quan s\u00e1t r\u1ed9ng r\u00e3i trong r\u1ea5t nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng t\u1ef1 nhi\u00ean v\u00e0 c\u00f4ng nghi\u1ec7p:<\/p>\n<ul>\n<li><strong>Kh\u00ed quy\u1ec3n:<\/strong> Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y g\u00f3p ph\u1ea7n v\u00e0o vi\u1ec7c h\u00ecnh th\u00e0nh c\u00e1c \u0111\u00e1m m\u00e2y v\u00e0 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn d\u1ef1 b\u00e1o th\u1eddi ti\u1ebft.<\/li>\n<li><strong>H\u1ea3i d\u01b0\u01a1ng h\u1ecdc:<\/strong> B\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c \u0111\u1ee3t s\u00f3ng m\u1ea1nh tr\u00ean bi\u1ec3n, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u01b0u th\u00f4ng n\u01b0\u1edbc v\u00e0 h\u1ec7 sinh th\u00e1i bi\u1ec3n.<\/li>\n<li><strong>Thi\u00ean v\u0103n h\u1ecdc:<\/strong> Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c quan s\u00e1t trong c\u00e1c \u0111\u00e1m m\u00e2y kh\u00ed c\u1ee7a h\u00e0nh tinh v\u00e0 sao, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c h\u00ecnh th\u00e0nh sao v\u00e0 h\u00e0nh tinh.<\/li>\n<li><strong>C\u00f4ng nghi\u1ec7p:<\/strong> Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t trong c\u00e1c quy tr\u00ecnh tr\u1ed9n ch\u1ea5t l\u1ecfng v\u00e0 kh\u00ed trong c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t v\u00e0 d\u1ea7u kh\u00ed.<\/li>\n<\/ul>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>B\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd quan tr\u1ecdng v\u00e0 ph\u1ee9c t\u1ea1p, c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh kh\u00e1c nhau. S\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap ch\u00fang ta d\u1ef1 b\u00e1o v\u00e0 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ef9 thu\u1eadt m\u00e0 c\u00f2n m\u1edf ra nhi\u1ec1u h\u01b0\u1edbng nghi\u00ean c\u1ee9u m\u1edbi trong c\u00e1c l\u0129nh v\u1ef1c khoa h\u1ecdc t\u1ef1 nhi\u00ean v\u00e0 c\u00f4ng nghi\u1ec7p.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec3u v\u1ec1 B\u1ea5t \u1ed5n \u0111\u1ecbnh Kelvin-Helmholtz: T\u00ecm hi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, nguy\u00ean nh\u00e2n v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u00f3 trong qu\u00e1 tr\u00ecnh l\u01b0u ch\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO 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