{"id":690205,"date":"2024-07-27T16:53:54","date_gmt":"2024-07-27T15:53:54","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=690205"},"modified":"2024-07-27T16:53:54","modified_gmt":"2024-07-27T15:53:54","slug":"hieu-ung-marangoni-gradient-suc-cang-be-mat-ung-dung","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/hieu-ung-marangoni-gradient-suc-cang-be-mat-ung-dung\/","title":{"rendered":"Hi\u1ec7u \u1ee8ng Marangoni | Gradient S\u1ee9c C\u0103ng B\u1ec1 M\u1eb7t & \u1ee8ng D\u1ee5ng"},"content":{"rendered":"

Hi\u1ec7u \u1ee8ng Marangoni: T\u00ecm hi\u1ec3u v\u1ec1 gradient s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t.<\/p>\n

\"Hi\u1ec7u<\/p>\n

Hi\u1ec7u \u1ee8ng Marangoni | Gradient S\u1ee9c C\u0103ng B\u1ec1 M\u1eb7t & \u1ee8ng D\u1ee5ng<\/h2>\n

Hi\u1ec7u \u1ee9ng Marangoni l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng quan tr\u1ecdng trong l\u0129nh v\u1ef1c nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc v\u00e0 ph\u00e2n t\u00edch b\u1ec1 m\u1eb7t, gi\u00fap gi\u1ea3i th\u00edch s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a ch\u1ea5t l\u1ecfng tr\u00ean b\u1ec1 m\u1eb7t do thay \u0111\u1ed5i v\u1ec1 s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t. Hi\u1ec7u \u1ee9ng n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c quan s\u00e1t th\u1ea5y trong c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng nh\u01b0 s\u1ef1 lan t\u1ecfa c\u1ee7a gi\u1ecdt n\u01b0\u1edbc m\u1eaft d\u1ecdc theo m\u1eb7t tr\u00ean c\u1ee7a ly r\u01b0\u1ee3u vang, ho\u1eb7c s\u1ef1 di chuy\u1ec3n c\u1ee7a d\u1ea7u tr\u00ean m\u1eb7t n\u01b0\u1edbc.<\/p>\n

Gradient S\u1ee9c C\u0103ng B\u1ec1 M\u1eb7t<\/h2>\n

S\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t (\\(\\sigma\\)) l\u00e0 l\u1ef1c t\u00e1c \u0111\u1ed9ng tr\u00ean b\u1ec1 m\u1eb7t gi\u1eefa hai pha (v\u00ed d\u1ee5 nh\u01b0 l\u1ecfng-kh\u00ed, l\u1ecfng-l\u1ecfng). Khi s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t thay \u0111\u1ed5i theo v\u1ecb tr\u00ed tr\u00ean b\u1ec1 m\u1eb7t ch\u1ea5t l\u1ecfng, n\u00f3 t\u1ea1o ra gradient s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t (\\(\\nabla\\sigma\\)). Gradient n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u00e2y ra b\u1edfi:<\/p>\n

<\/p>\n

  • S\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 (\\(\\nabla T\\))<\/li>\n
  • S\u1ef1 thay \u0111\u1ed5i v\u1ec1 n\u1ed3ng \u0111\u1ed9 ch\u1ea5t tan (\\(\\nabla C\\))<\/li>\n

    <\/u1><\/p>\n

    \u0110\u1ecbnh lu\u1eadt c\u01a1 b\u1ea3n c\u1ee7a hi\u1ec7u \u1ee9ng Marangoni \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi m\u1ed9t l\u1ef1c c\u0103ng b\u1ec1 m\u1eb7t theo c\u00f4ng th\u1ee9c:<\/p>\n

    \\(\\nabla\\sigma = \\frac{\\partial\\sigma}{\\partial C} \\cdot \\nabla C + \\frac{\\partial\\sigma}{\\partial T} \\cdot \\nabla T\\)<\/p>\n

    \u1ee8ng D\u1ee5ng C\u1ee7a Hi\u1ec7u \u1ee8ng Marangoni<\/h2>\n

    Hi\u1ec7u \u1ee9ng Marangoni c\u00f3 r\u1ea5t nhi\u1ec1u \u1ee9ng d\u1ee5ng trong c\u00f4ng nghi\u1ec7p v\u00e0 nghi\u00ean c\u1ee9u khoa h\u1ecdc:<\/p>\n

    <\/p>\n

  • H\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t:<\/b> S\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t b\u1eb1ng c\u00e1ch t\u1eadn d\u1ee5ng chuy\u1ec3n \u0111\u1ed9ng ch\u1ea5t l\u1ecfng do gradient s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t.<\/li>\n
  • In 3D:<\/b> Trong ng\u00e0nh in 3D, hi\u1ec7u \u1ee9ng n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9 m\u1ecbn b\u1ec1 m\u1eb7t v\u00e0 s\u1ef1 ph\u00e2n b\u1ed1 v\u1eadt li\u1ec7u ch\u00ednh x\u00e1c h\u01a1n.<\/li>\n
  • Qu\u00e1 tr\u00ecnh h\u00e0n:<\/b> Trong qu\u00e1 tr\u00ecnh h\u00e0n, gradient nhi\u1ec7t \u0111\u1ed9 t\u1ea1o ra gradient s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t gi\u00fap \u0111i\u1ec1u khi\u1ec3n chi\u1ec1u s\u00e2u v\u00e0 chi\u1ec1u r\u1ed9ng c\u1ee7a v\u00f9ng ch\u1ea3y l\u1ecfng.<\/li>\n
  • \u0110\u1ed9ng c\u01a1 nhi\u1ec7t:<\/b> S\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a s\u1ef1 truy\u1ec1n d\u1eabn nhi\u1ec7t v\u00e0 hi\u1ec7u qu\u1ea3 \u0111\u1ed9ng c\u01a1.<\/li>\n

    <\/o1><\/p>\n

    K\u1ebft Lu\u1eadn<\/h2>\n

    Hi\u1ec7u \u1ee9ng Marangoni l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng ph\u1ee9c t\u1ea1p nh\u01b0ng v\u00f4 c\u00f9ng h\u1eefu \u00edch trong nhi\u1ec1u l\u0129nh v\u1ef1c khoa h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt. T\u1eeb vi\u1ec7c c\u1ea3i thi\u1ec7n h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t \u0111\u1ebfn t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh h\u00e0n v\u00e0 in 3D, hi\u1ec3u bi\u1ebft v\u1ec1 gradient s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3 s\u1ebd gi\u00fap ch\u00fang ta khai th\u00e1c hi\u1ec7u qu\u1ea3 v\u00e0 m\u1edf r\u1ed9ng ph\u1ea1m vi \u1ee9ng d\u1ee5ng c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Hi\u1ec7u \u1ee8ng Marangoni: T\u00ecm hi\u1ec3u v\u1ec1 gradient s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t.<\/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":"\nHi\u1ec7u \u1ee8ng Marangoni | Gradient S\u1ee9c C\u0103ng B\u1ec1 M\u1eb7t & \u1ee8ng D\u1ee5ng<\/title>\n<meta name=\"description\" content=\"Hi\u1ec7u \u1ee8ng Marangoni: T\u00ecm hi\u1ec3u v\u1ec1 gradient s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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