![\"Hi\u1ec3u](\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/hieu_ro_su_nhieu_dong_trong_dong_chay_chat_long.png\")
<\/p>\nHi\u1ec3u R\u00f5 S\u1ef1 Nhi\u1ec5u \u0110\u1ed9ng Trong D\u00f2ng Ch\u1ea3y Ch\u1ea5t L\u1ecfng: T\u00ecm hi\u1ec3u c\u01a1 b\u1ea3n v\u1ec1 nhi\u1ec5u \u0111\u1ed9ng trong h\u1ec7 th\u1ed1ng d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng v\u00e0 t\u1ea7m quan tr\u1ecdng trong k\u1ef9 thu\u1eadt nhi\u1ec7t.<\/p>\n
<\/p>\n
S\u1ef1 nhi\u1ec5u \u0111\u1ed9ng trong d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng ph\u1ed5 bi\u1ebfn trong t\u1ef1 nhi\u00ean v\u00e0 c\u00f4ng nghi\u1ec7p. \u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 s\u1ef1 nhi\u1ec5u \u0111\u1ed9ng, tr\u01b0\u1edbc h\u1ebft ch\u00fang ta c\u1ea7n n\u1eafm v\u1eefng m\u1ed9t s\u1ed1 kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1edbi thi\u1ec7u n\u1ec1n t\u1ea3ng c\u1ee7a s\u1ef1 nhi\u1ec5u \u0111\u1ed9ng v\u00e0 t\u1ea1i sao n\u00f3 l\u1ea1i quan tr\u1ecdng trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t.<\/p>\n
D\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i ch\u00ednh: d\u00f2ng ch\u1ea3y laminar v\u00e0 d\u00f2ng ch\u1ea3y nhi\u1ec5u \u0111\u1ed9ng. D\u00f2ng ch\u1ea3y laminar l\u00e0 d\u00f2ng ch\u1ea3y \u1ed5n \u0111\u1ecbnh, n\u01a1i c\u00e1c l\u1edbp ch\u1ea5t l\u1ecfng di chuy\u1ec3n song song v\u00e0 kh\u00f4ng giao thoa v\u1edbi nhau. Ng\u01b0\u1ee3c l\u1ea1i, d\u00f2ng ch\u1ea3y nhi\u1ec5u \u0111\u1ed9ng l\u00e0 d\u00f2ng ch\u1ea3y kh\u00f4ng \u1ed5n \u0111\u1ecbnh, trong \u0111\u00f3 c\u00e1c ph\u1ea7n t\u1eed ch\u1ea5t l\u1ecfng di chuy\u1ec3n theo c\u00e1c \u0111\u01b0\u1eddng kh\u00f4ng x\u00e1c \u0111\u1ecbnh v\u00e0 xo\u00e1y m\u1ea1nh.<\/p>\n
M\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh lo\u1ea1i d\u00f2ng ch\u1ea3y l\u00e0 s\u1ed1 Reynolds, \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0 Re<\/i>. S\u1ed1 Reynolds l\u00e0 m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng kh\u00f4ng th\u1ee9 nguy\u00ean, th\u1ec3 hi\u1ec7n t\u1ef7 l\u1ec7 gi\u1eefa l\u1ef1c qu\u00e1n t\u00ednh v\u00e0 l\u1ef1c nh\u1edbt trong ch\u1ea5t l\u1ecfng. C\u00f4ng th\u1ee9c c\u1ee7a s\u1ed1 Reynolds nh\u01b0 sau:<\/p>\n
\\( Re = \\frac{\\rho \\cdot v \\cdot L}{\\mu} \\)<\/p>\n
Trong \u0111\u00f3:<\/p>\n
N\u1ebfu s\u1ed1 Reynolds th\u1ea5p (th\u01b0\u1eddng d\u01b0\u1edbi 2000), d\u00f2ng ch\u1ea3y th\u01b0\u1eddng l\u00e0 laminar. N\u1ebfu s\u1ed1 Reynolds cao (th\u01b0\u1eddng tr\u00ean 4000), d\u00f2ng ch\u1ea3y th\u01b0\u1eddng l\u00e0 nhi\u1ec5u \u0111\u1ed9ng.<\/p>\n
S\u1ef1 nhi\u1ec5u \u0111\u1ed9ng c\u00f3 c\u1ea3 \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m trong th\u1ef1c t\u1ebf \u1ee9ng d\u1ee5ng:<\/p>\n
N\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 s\u1ef1 nhi\u1ec5u \u0111\u1ed9ng trong d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng l\u00e0 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 nhi\u1ec7t v\u00e0 c\u00e1c nh\u00e0 khoa h\u1ecdc. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u1ed1i \u01b0u h\u00f3a c\u00e1c qu\u00e1 tr\u00ecnh c\u00f4ng nghi\u1ec7p v\u00e0 thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7u qu\u1ea3 h\u01a1n. Hi\u1ec3u r\u00f5 s\u1ef1 nhi\u1ec5u \u0111\u1ed9ng kh\u00f4ng ch\u1ec9 gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t m\u00e0 c\u00f2n gi\u1ea3m thi\u1ec3u c\u00e1c r\u1ee7i ro v\u00e0 t\u1ed5n th\u1ea5t kh\u00f4ng mong mu\u1ed1n trong h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt.<\/p>\n
V\u1edbi nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 n\u1ec1n t\u1ea3ng \u0111\u1ec3 ti\u1ebfp t\u1ee5c kh\u00e1m ph\u00e1 v\u00e0 nghi\u00ean c\u1ee9u s\u00e2u h\u01a1n v\u1ec1 s\u1ef1 nhi\u1ec5u \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3 trong k\u1ef9 thu\u1eadt nhi\u1ec7t v\u00e0 c\u00e1c l\u0129nh v\u1ef1c li\u00ean quan.<\/p>\n","protected":false},"excerpt":{"rendered":"
Hi\u1ec3u R\u00f5 S\u1ef1 Nhi\u1ec5u \u0110\u1ed9ng Trong D\u00f2ng Ch\u1ea3y Ch\u1ea5t L\u1ecfng: T\u00ecm hi\u1ec3u c\u01a1 b\u1ea3n v\u1ec1 nhi\u1ec5u \u0111\u1ed9ng trong h\u1ec7 th\u1ed1ng d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng v\u00e0 t\u1ea7m quan tr\u1ecdng trong 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":"\n