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vorticity transport
相关语句
  涡量输运
     Since the disturbance expansion has been taken into account,one has to solve the mass,vorticity transport and energy transport equations for disturbance motion in a coupled way.
     由于取消了“扰动胀量为零”的假设,需要耦合求解扰动质量方程、扰动涡量输运方程和扰动能量输运方程。
短句来源
     The vorticity transport equation is solved by the two-stage Runge-Kutta method. The velocity Poisson equation is solved by LSOR method, then the non-divergence correction scheme is done to velocity.
     其中涡量输运方程采用二步R -K方法求解 ,速度泊松方程采用LSOR方法求解 ,并对速度进行了无散修正 .
短句来源
     The solution of the vorticity transport equation was split into four steps using the fourth-order Runge-Kutta method.
     对涡量输运方程的时间项运用四阶Runge-Kutta法离散,从而将方程分解为4个计算步分别求解。
短句来源
  涡度输送
     the vertical vorticity transport and the twisting term played the opposite role, and roughly offset.
     垂直涡度输送项和扭转项的贡献相反 ,基本上互相抵消。
短句来源
  “vorticity transport”译为未确定词的双语例句
     The precision and artificial viscosity of various difference schemes of 1-D and 2-D vorticity transport equations are investigated in this paper. The ideas introduced from the classical finite difference theory, such as consistence, convergence, precision, artificial viscosity are examined and some new comments on these ideas are made and used to explain something puzzling in solving N-S equations.
     本文分析了一维和二维涡方程各种差分格式的精度和人工粘性,对经典差分理论的一些提法,诸如相容性,收敛性、精度、人工粘性等提出了疑义,阐述了笔者对这些概念的认识,并用来解释N-S方程求解中一些长期令人迷惑的现象。
短句来源
     The Alternative-Direction Implicit algorithm for the vorticity transport equation, and the Fast Fourier Transform algorithm for the stream function equation are used with the accuracy of second order in space and first order in time. The corresponding experiments are carried out and their results are analyzed.
     涡量传输方程采用ADI(隐式交替)格式,流函数方程采用FFT(快速傅里叶变换)格式,计算结果具有二阶空间精度和一阶时间精度,作了相应的实验,对实验结果进行了分析和讨论。
短句来源
     Reducing of positive vorticity transport by lower level jet to southwest vortex and shear line,combining with the shear lineled by 500 hPa upper trough,thesouthwest vortex strengthen. All these make the shear line weaker and disappeare finally.
     由于低空急流对西南涡和切变线的正涡度平流输送减弱,以及500 hPa高空槽引导切变线向南移与西南涡结合,造成西南涡增强,切变线减弱、消失。
短句来源
     Based on these calculations, the authors analyze the science-practical nature of the Prandtl Mixing Length hypothesis, the momentum-transport theory, the Karman Similarity theory and the Taylor Vorticity Transport theory.
     对卡门常数和普朗特混合长度进行了理论计算,并据此分析和论证了普朗特混合长度假说与动量传递理论和卡门关于紊流局部运动相似理论以及泰勒的涡旋传递理论的科学性和实用性。
  相似匹配句对
     O.C.P Transport
     什么是O.C.P运输?
短句来源
     Sustainable Transport
     可持续交通
短句来源
     VERTICAL TRANSPORT OF POTENTIAL VORTICITY DUE TO CUMULUS CONVECTION IN THE ITCZ AREA
     积云对流对ITCZ区域位涡的垂直输送
短句来源
     the vertical vorticity transport and the twisting term played the opposite role, and roughly offset.
     垂直涡度输送项和扭转项的贡献相反 ,基本上互相抵消。
短句来源
     MEASUREMENTS OF VORTICITY FIELD
     涡量场测量
短句来源
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  vorticity transport
To do so, we examine both linear and nonlinear solutions of the momentum and vorticity transport equations in spherical coordinates.
      
The developed mathematical model is governed by the coupled equations of stream function, vorticity transport, and energy, and is solved by employing the cubic spline collocation method.
      
not involving time derivatives) associated with the prognostic one for vorticity transport.
      
The gravitational term in the vorticity transport equation isfound to be the main mechanism for the buoyant flow instability and thedevelopment of counter-rotating vortices in reactive plumes.
      
Budgets of the vorticity transport are examined to revealthe mechanisms leading to the formation and evolution of large vorticalstructures in forced plumes.
      
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In case where the Rossby number r << 1, the motion may deviate from quasi-geos-trophic state, if the increase rate of temperature due to release of latent heat is stronger than thermal advection in any broad rainfall region, or alternatively, if the vertical transport of momentum by thermal convection is stronger than momentum advection. In this case, the divergence field and the -field are both stronger than that in quasi-geostrophic situation. However, expect for a few extreme occasions, the vorticity field...

In case where the Rossby number r << 1, the motion may deviate from quasi-geos-trophic state, if the increase rate of temperature due to release of latent heat is stronger than thermal advection in any broad rainfall region, or alternatively, if the vertical transport of momentum by thermal convection is stronger than momentum advection. In this case, the divergence field and the -field are both stronger than that in quasi-geostrophic situation. However, expect for a few extreme occasions, the vorticity field may still be quasi-geostrophic, i.e. f△Ψ = △φ. It follows that some basic principles concerning the quasi-geostrophic evolution of the synoptic regime in westerlies are valid for subtropic circumstance.In this paper, evidence is provided for the ideas mentioned above, and the concept, "generalized quasi-geostrophic evolution" is introduced. An approximate analytical solution which can clearly and simply express the common rule about the variation of meteorological field governed by some forcing sources during generalized quasi-geostrophic evolution. Particularly, we have discussed the role of latent heat and con-vective vorticity transport in above-mentioned evolution process.

在 Rossbs数λ《1的情况下,如果在大范围降水区域中潜热增温率大于温度平流,或者因热力对流引起的动量铅直传递大于动量平流,都能使运动偏离准地转状态。散度场和垂直速度场都比准地转情况下强。但除少数极端情况外,涡度场仍是准地转的。基于这一点,关于西风带天气系统准地转演变的一些基本原理也适用于一般副热带场合。本文论证了上述观点,提出泛准地转演变的概念。并给出一种能够清晰、简洁地表述泛准地转演变中各种扰源制约场变化的一般规律近似解析解。特别讨论了水汽潜热和涡度的对流铅直传递在其中的地位。

In this paper,the relation between the activities of Indian monsoon tronghsand low-vortexs in southwest China has been analysed by using the data ofwinds at 700 mb level and satellit cloud pictures for six years from 1972 to1977.It is found that the namber of low.Vortexs in southwest China is twicegreater when the Indian trongh is located to the north of its mean location thanto the sonth of its mean location,The calculated result of the dynamie and thermodynamic conditions in somecases shows that the formation...

In this paper,the relation between the activities of Indian monsoon tronghsand low-vortexs in southwest China has been analysed by using the data ofwinds at 700 mb level and satellit cloud pictures for six years from 1972 to1977.It is found that the namber of low.Vortexs in southwest China is twicegreater when the Indian trongh is located to the north of its mean location thanto the sonth of its mean location,The calculated result of the dynamie and thermodynamic conditions in somecases shows that the formation of the low-vortex in southwest China resultsfrom the cyclonie vorticity transport of the monsoon trongh and the convergenceof water vapour in the tropical monsoon coming from the Bay of Bengal.In theinitial stage of a low vertex,there is a warm core in it,and the relitf of latanthent plays an important role in the formation of the warm core.When it develo-ps and moves eastward.It gradualy becomes anextra-tropical cyclon.Then,thewater vapour in rainfall processes is supplied by the monsoon flows comingfrom the Bay of Bengal and the south China Sea.The result mentioned abovehelps to forecast the low-vortex in southwest China.

本文用1972—1977年六年的6—8月700毫巴流场及卫星云图等资料,分析了印度季风槽的活动与我国西南地区低涡活动的关系.发现当印度季风槽比平均位置偏北时,西南低涡的发生率比其偏南时多两倍以上.对个例的一些动力和热力学条件进行计算,所得的结果表明:西南涡的形成是季风槽的气旋性涡度输送和来自孟加拉湾的热带季风的水汽在低涡区辐合所致.低涡的形成和发展初期是暖性结构,潜热的释放对暖性结构的形成具有重要作用.在它东移发展后,成为一个温带气旋,这时低涡降水过程的水汽是由孟加拉湾和南海的热带季风气流共同提供.这些结果有助于低涡过程的预报.

In this work, the gas-liquid two phase fluid flow and the recirculating flow field in the bottom blown argon stirred bath are studied by means of experiments carried with physical model together with numerical solutions of the mathematical model. The mathematical model consists of the turbulent flow mean vorticity transport equation and stream function equation. K-ε turb-ulance two equation model, the pure buoyance madel and the boundary conditions, The mathematical model is numerically solved implicitly...

In this work, the gas-liquid two phase fluid flow and the recirculating flow field in the bottom blown argon stirred bath are studied by means of experiments carried with physical model together with numerical solutions of the mathematical model. The mathematical model consists of the turbulent flow mean vorticity transport equation and stream function equation. K-ε turb-ulance two equation model, the pure buoyance madel and the boundary conditions, The mathematical model is numerically solved implicitly using methed for solving recirculating flow problems developed by prof, Spalding, so that the flow pattern and dislributions of velocity,turbulence kinetic energy, turbulence kinetrc energy dissipation rate, vorticity, the turbulence viscosity, the density and the gas void fraction ratio are obtained. Velocity distribution computed agree well with those measured by laser Doppler anemometer, the computed flow patterns together with the position of the centre of the recirculation flows are in agreement with those obtained by photograpies taking from flow visualization. It shows that, the mathematical model together with its method of solution used arc acceptable for predicting the velocity field in domain of the problem worked, and this work therefore is of practical significamce.

本文将物理模型实验与数学模型数值求解相配合,对底吹气体揽拌下熔池内流场进行了研究。以湍流运动学方程和动力学方程、Harlow—Nakayama湍流k—ε双方程模型[1]及边界条件构成了所研究问题的数学模型,应用Spalding等计算湍流回流的方法[2],对数学模型数值求解,得到熔池流场涡量,流函数、湍动能、湍动能耗散率、湍流旋涡粘性系数、速度、含气率及密度等的分布,计算与测定了三种工况,计算与实验结果吻合。

 
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