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采用双流体模型
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  two-fluid approach
     Two-fluid approach is introduced to simulate the three dimensional gas-solid flow through T-shape blind elbow in pneumatic conveying system.
     采用双流体模型 ,对气力输送系统中T形盲管弯头的 3维气固两相流场进行了数值模拟。
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  “采用双流体模型”译为未确定词的双语例句
     On the basis of cold gas simulation, a numerical simulation of two-phase turbulent flow was performed employing an Eulerian-Eulerian approach and K- -A.
     在冷流模拟的基础上,对燃烧室尾部的两相湍流流场进行了数值模拟,数值模拟采用双流体模型和K-ε-A.
短句来源
     In chapter two,according to N-S equation,considering the couple between liquid and solid,the double-fluid model is used to respectively set up momentum equations of two-phase fluids in condition of basic hypothesis,which are general equations of two-phase fluids.
     第二章依据N-S方程,考虑到液、固之间的相间耦合,在基本假设条件下,采用双流体模型,分别建立液、固两相的动量方程,它是固液两相流体的一般方程式;
短句来源
     The pseudo-fluid model and the k-ε turbulent model were modified. Phase coupled SIMPLE algorithm was applied to form the pressure-velocity correction equation.
     计算采用双流体模型及k-ε湍流模型,Phase Coupled SIMPLE算法进行压力速度耦合计算.
短句来源
     Numerical simulation of shooting sand process was conducted using two fluid model to describe the shooting sand process based on newly developed two phase flow theory.
     利用新兴的两相流理论 ,采用双流体模型来描述射砂过程 ,对射砂过程进行了数值模拟。
短句来源
     Using two fluids model, the frictional pressure drops of oil gas water three phase flow in a horizonatal tube ( 45 mm) were studied experimentally and theoretically. For different flow regimes new calculation correlations were proposed.
     采用双流体模型,将油水混合物作为非牛顿流体,重点进行了间歇流的摩擦阻力计算分析,并在管径45mm、水平放置圆管的实验台架上对不同流型的油气水三相流动的摩擦阻力进行了计算和测量.结果表明,间歇流摩擦阻力计算式与实验测量结果基本一致,进一步改进后可用于工程计算和运行检测;
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  相似匹配句对
     A TWO-FLUID MODEL OF TURBULENT COMBUSTION
     湍流燃烧的流体模型
短句来源
     Based on a one-fluid, two-temperature radiation hydrokinetics model, we study the interaction processes of XeCl laser radiation with a one-dimensional aluminium target.
     采用一维单流体温度辐射流体动力学模型.
短句来源
     SIMULATION OF FLUIDIZED BED USING TWO-FLUID MODEL
     基于流体模型的流化床模拟
短句来源
     Two-fluid model of sediment clouds diffusion
     泥沙云团扩散的流体模型
     The two-fluid-model of turbulent buoyant recirculating flows
     紊浮力回流的流体模型
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  two-fluid approach
We use a two-fluid approach in which the total pressure in the medium is the sum of the circumstellar gas pressure and the relativistic particle pressure.
      
In the present study we simulate numerically the solar wind flow in a coronal hole with the two-fluid approach.
      
Employing a two-fluid approach, each phase was considered a fluid that interpenetrates the other phase.
      
The two-fluid approach to solving this problem has yielded promising initial results, and appears to simulate correctly the basic physics of the flow.
      


First the two different definitions of pressure and thermal flux etc. in diffusion model and in two-fluid model are given. Then a physical interpretation of pressure and thermal flux is discussed by introducing the momentum flux vector M and the energy flax (?) through a surface dS in flow field. In describing the motion of mixture, it is suggested to use the qnaatities defined in diffusion model. In describing the motion of a component, it is suggested to use the quantities defined in two-fluid model. The collision...

First the two different definitions of pressure and thermal flux etc. in diffusion model and in two-fluid model are given. Then a physical interpretation of pressure and thermal flux is discussed by introducing the momentum flux vector M and the energy flax (?) through a surface dS in flow field. In describing the motion of mixture, it is suggested to use the qnaatities defined in diffusion model. In describing the motion of a component, it is suggested to use the quantities defined in two-fluid model. The collision pressure and the collision thermal flux in dense gas-mixture are also discussed in detail, i.e. their origin, their expressions in momentum equation and in energy equation, and the difference in physical character between them and the normal partial pressure and partial thermal flux.A gas-particle flow can be treated as a flow of dense gas-mixture. The long-standing con-trovesy whether the "inertial coupling term" should exist in the momentum equation can be clarified by the two different definitions of pressure.

本文首先给出单流体模型和双流体模型中压强和热流等物理量的两种不同定义。然后通过引入流场中某面元dS的动置流密度M和能量流密度δ来讨论压强和热流等量的物理意义。指出,在描述混合物运动的守恒方程中以采用单流体模型定义的各量为宜,在描述组元运动的守恒方程中以采用双流体模型定义的各量为宜。本文还详细讨论了稠密混合气体中的碰撞压强和碰撞热流,说明它们的来源,它们在动量方程和能量方程中的表达形式,以及它们同通常的分压和分热流的本质差别。 气固两相流可视为一种稠密的混合气体流动。两相流中关于动置方程中是否应有“惯性耦合项”的长期争论,可以用分压的两种不同定义予以澄清。

One fluid model, diffusion model and two fluid model can be used to describe the motion of mixtures. By introducing these three models and comparing them with each other, it should be pointed out that the one fluid model has fewer motion equations and hence can be easilier solved, but there are less informations in the solution. The latter two models contain equal amount of information. Since the motion equations of the diffusion model can be deduced from that of the two fluid model by introducing some approximate...

One fluid model, diffusion model and two fluid model can be used to describe the motion of mixtures. By introducing these three models and comparing them with each other, it should be pointed out that the one fluid model has fewer motion equations and hence can be easilier solved, but there are less informations in the solution. The latter two models contain equal amount of information. Since the motion equations of the diffusion model can be deduced from that of the two fluid model by introducing some approximate assumptions, a certain error is involved in it while it can be easilier solved than the two fluid model. The relationship between the error and the physical properties of the moving media has been analysed and the application range of the diffusion model has been given in this paper. It has been explained why the one fluid model and the diffusion model are often used for mixed gas and the two fluid model is used for gas particle mixture. The property of liquid particle mixture lies between the two kinds of mixture above and the diffusion model is basically, but not completely suitable to it. In the diffusion model, the diffusion velocity is often expressed according to the well known Fick′s law. It should be pointed out that the application of the Fick′s law is conditional and the difficulties met in sediment mechanics nowdays are contacted with these limitations, hence it is necessary to introduce a more general expression of the diffusion velocity. \ \

描写混合物运动可以采用单流体模型、扩散模型和双流体模型,本文简要介绍了这三种模型,并作了比较,指出:单流体模型方程少、求解简单,但解中包含的信息量少;后两种模型包含的信息量相等,由于扩散模型方程组可从双流体模型方程组引入某种近似后推导出来,它的求解比双流体模型方程组简单,但包含一定的误差.本文分析了这种误差与运动介质物性的关系,给出了扩散模型的适用范围,说明了为什么对于气体混合物常用单流体模型或扩散模型,而对于气-固混合物大多采用双流体模型.液-固混合物性质介于上述两种混合物之间,扩散模型对于它基本上适用,但并不完全适用.扩散模型中的扩散速度表达式,常根据费克定律给出.本文指出了费克定律的局限性,并把它与泥沙运动力学目前遇到的困难联系起来,由此说明采用更一般的扩散速度表达式的必要性.

According to the fundamental concept of two-fluids,the governing equations for description of gas-droplets turbulent combustion in an afterburner of jet engine have been formulated,in which the important injection effect of the droplets in afterburner has been taken into detailed consideration.The Farve average method has been employed to represent the effects of turbulent combustion in the afterburner.The multiple time scale turbulent k-ε model proposed by Kim is applied to calculating the eddy viscosity of...

According to the fundamental concept of two-fluids,the governing equations for description of gas-droplets turbulent combustion in an afterburner of jet engine have been formulated,in which the important injection effect of the droplets in afterburner has been taken into detailed consideration.The Farve average method has been employed to represent the effects of turbulent combustion in the afterburner.The multiple time scale turbulent k-ε model proposed by Kim is applied to calculating the eddy viscosity of the turbulenct field.The heat flux radiation model has been taken to consider the effect of radiation at high temperature,the simple one step chemical reaction model is used to approximate the combustion of kerosene.The chemical reaction rate is assumed to be controlled by eddy break up process,and the reaction rate is modified by premixed reaction model in Arrhenius form.The application of SIMPLE algorithm indicates that the present twofluid model can calculate the two-phase turbulent combustion in the jet engine afterburner and obtain reasonable results.

提出了描写航空发动机加力燃烧室内气液两相湍流燃烧的控制方程,采用了双流体模型,高温辐射通量模型,双时间尺度湍流K-ε模型,应用SIMPLE方法解这组方程,对二维轴对称的涡喷加力燃烧室进行计算,证明应用本文的液雾燃烧模型可以得出合理的计算结果。

 
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