1)Prandtl number普朗特数
1.Prandtl number reflects the effect of energy and momentum transport in fluid; it has been frequently used in thermodynamic and hoat transfer computation.反映流体中能量和动量迁移过程相互影响的无因次组合数———普朗特数，在热力计算中具有重要的作用。
2.As the result shows, When Prandtl number increasing, That the torsion will distort the shape.结果表明:对大普朗特数的流体,桡率将显著改变等温轮廓线的形状。
3.Following previous studies of rectangular cavity enclosures of aspect ratio 2,direct numerical two-dimensional simulations are conducted for the combined thermally and electromagnetically driven convection flow in three Prandtl number fluids of 0.针对矩形槽内导电流体普朗特数分别为0。
英文短句/例句
1.EFFECT OF PRANDTAL NUMBER ON COMBINED THERMALLY AND ELECTROMAGNETICALLY DRIVEN CONVECTION HEAT TRANSFER IN A CAVITY普朗特数对槽内热磁耦合流动换热影响
2.Using the new ?anomalous magnetic Prandtl number? in accretion disks, we study the effect of dissipation on magnetic instability of Keplerian disks.我们利用吸积盘中新的反常磁普朗特数来研究耗散过程对开普勒盘磁不稳定性的影响.
3.prandtl glauert rule普朗特 格劳厄脱规则
4.Billions of dollars come and go, but Donald Trump has never lost his billion-dollar ego.数十亿美元转瞬消失，唐纳德?特朗普却从未失去过他无价的自尊心。
5.Planck's constant controls the magnitudes involved in both cases.普朗克常数决定了这两种情况所涉及的量值。
6.Experimental data collection and process for Planck constant measurement system普朗克常量测定系统中实验数据的采集和处理
7.Photon,Particle of Dark Matter,Planck Particle and Dirac Barge Number光子、暗物质粒子、普朗克粒子与狄拉克大数
8.Discussion on Methods of Testing of Plank Constant in Photoelectric Effect Experiment;光电效应测定普朗克常数中测量方法的讨论
9.Method and Error Analysis of Measuring Plank’s Constant by Photoelectric effect光电效应测量普朗克常数的方法及误差分析
10.An Original Study on the Approximate Solution for A Kind of Prandtl Boundary-Layer Equations;一类普朗特边界层方程逼近解的初步探讨
11.Breathing-reset when reading literature in Mandarin;汉语普通话不同文体朗读时的呼吸重置特性
12.Porphyry Characteristics and Metallogenic Significance of Pulang Porphyry Copper Deposit普朗斑岩铜矿床斑岩特征及其成矿意义
13.A tracing test of karst seepage of the tailing reservoir in the Pulang copper deposit,Yunnan,China云南普朗铜矿尾矿库喀斯特渗漏示踪试验研究
14.Geological and geochemical feature and petrogenesis of Pulang complex,Yannan Province,China云南普朗复式岩体地质地球化学特征及成因
15.The application of the least square algorithm in testing planck constant in photoelectric effect experiment;最小二乘法在光电效应法测普朗克常数实验中的应用
16.Here is part of the story read by seven-year-old Miko Prescott.下面是7岁的米高?普雷斯科特朗读故事的一部分。
17.Donald Trump was born across the East River in the Borough of Queens, into a middle-class family.唐纳德?特朗普出生于纽约东河对面皇后区的一户中产阶级家庭。
18.Application of Multivariate Statistic Analysis in Research into Geochemical Characteristics of Pulang Porphyry Copper Deposit;多元统计分析方法在普朗铜矿地球化学特征研究中的应用
相关短句/例句
magnetic Prandtl number磁普朗特数
1.Using the new anomalous magnetic Prandtl number in accretion disks, we study the effect of dissipation on magnetic instability of Keplerian disks. 我们利用吸积盘中新的反常磁普朗特数来研究耗散过程对开普勒盘磁不稳定性的影响。
3)turbulent prandtl number湍流普朗特数
4)characteristic Prandtl number广义普朗特数
5)low Prandtl number fluid低普朗特数流体
6)prandtl torsion function普朗特扭转函数
延伸阅读
普朗特数 由流体物性参数组成的一个无因次数（即无量纲参数）群，表明温度边界层和流动边界层的关系，反映流体物理性质对对流传热过程的影响，它的表达式为： 式中v为运动粘度；α为导温系数（见热传导）;μ为动力粘度；cp为等压比热容；λ为热导率。其中v和α分别表示分子传递过程中动量传递和热量传递的特性。 当几何尺寸和流速一定时，流体粘度大，流动边界层厚度也大；流体导温系数大，温度传递速度快，温度边界层厚度发展得快,使温度边界层厚度增加。因此,普朗特数的大小可直接用来衡量两种边界层厚度的比值。 不同流体的普朗特数相差很大：空气的普朗特数约为0.7；水的普朗特数在20℃时约为 7，在100℃时约为1.75；油的普朗特数的数量级为103;液态金属的普朗特数很小，如汞在20℃时为0.0266。
