区别对待的因次分析方法与传统因次分析方法的比较及其在传热和流体力学中的应用.pdfVIP

Chin. J. Chem. Eng.. 1纠纷 62仕-1531 (2∞7) Discriminated Dimensional Analysis 协rsus Classical Dimensional Analysi暗 and Applications to Heat 1￥ansfer and Fluid Dynamics 民 Alhal1l8 and C.N. Madrid* Department of Applied Phys阳.TI配hni础1 UIÚven;jty of Cartagena, Catnpus Muralla del Mar. Cartagena 30203. Spain Abstract In contrast to classica1 dimensÎonal ana1ysis\ discriminated dimensional 酬alysis 踹阳mes that spatial coor，出nat四 are dimensionally independent of 阳.ch olher and allows other types of geome帆cal quantity to be used in the dimensiona1 b制1S.咄咄刷刷rface. and 剧gl制 As a cons叫uence， discriminated dimensional analysis leads 阳 a lower number of dimensional groups. which make，由e solution more p阿~.cise. Besid时，刷刷e discrirninated 伊uups have a clear physical meaning in t.erms of force and energy h副ances. The paper introduces 由is technique and provides dimensional 叫uations for the main quantities and physical param时町S of Ihe heat 忧制Isfer and t1 uid flow tields. Two applications 缸喧 presented 10 demonstrate 由e efficíency 0们由ísm时hod K町words discriminated dimensíonal ana1ys屿. heat transfer, fluid dynamics. dïmensÍonless number 1 lNTRODUCTION mtio between inertia force and viscous force，由is ratio Dim巳nsional analysis, a fLrst, low-cost step for referring 10 the region in which the fluid is disturbed studying many physical and engine时ing problems , by the obstacle. However, the region of disturbed fluid combines several variables into dimensionless groups is defined by 阳。 lengths since it is a 2-D problem. Is in order to facilitate the inte叩retation and extend the h产， the凯. the ratio in questionl What role does Re产 range of application of experimental data. To app