粘性耗散

其次，应用FLUENT软件对PP和HDPE熔体以不同工艺参数，流经不同截面尺寸矩形微通道时，由粘性耗散效应引起的出口熔体温升值进行了数值模拟。

Secondly , outlet temperature rise caused by viscous dissipation when PP and HDPE melt flow through micro channels at different process parameters was simulated using FLUENT software .

一种基于粘性耗散的动态黏度计算方法

A Method of Modeling Dynamic Viscosity Based on Viscous Dissipation

基于Brinkman流动模型，研究了等通量壁多孔饱和圆管中粘性耗散对强迫对流的影响。

The viscous dissipation effect on forced convection in a porous saturated circular tube with an isoflux wall is investigated on the basis of the Brinkman flow model .

提出了描述非线性粘弹性材料微损伤演化的两类内变量，一类是描述粘性耗散的内变量，它服从Onsager原理；

Two kinds of intrinsic variable , the intrinsic variable of viscosity dissipation and that of damage dissipation , are introduced to express the dissipation in non linear viscoelastic materials .

微注塑成型充模流动中粘性耗散与对流传热研究

Research on Viscous Dissipation and Heat Transfer in Micro Injection Molding

多孔介质强迫对流传热中粘性耗散的影响

Effect of Viscous Dissipation on Forced Convection Heat Transfer in Porous Media

结果表明：粘性耗散与塔架效应是引起尾涡变形的主要原因。

The result shows that viscidity dissipation and tower effect are main reasons of wake eddy distortion .

锚式搅拌槽中高粘牛顿流体的流速分布及其粘性耗散

Velocity Distribution and Energy Dissipation for Flow of Highly Viscous Fluid in Agitated Vessel with Anchor Impeller

等通量壁多孔饱和圆管中粘性耗散对热发展强迫对流的影响

Effects of Viscous Dissipation on Thermally Developing Forced Convection in a Porous Saturated Circular Tube With an Isoflux Wall

粘性耗散及变物性对多孔介质中对流换热的影响研究

Numerical investigation on the effects of viscous dissipation and variable thermophysical properties on forced convection heat transfer in porous media

当退化到纯弹性的情形，粘性耗散消失，自由能释放率与经典的能量释放率等价。由此，本文给出含湿、热效应的裂尖能量释放率的积分表达式。

With the viscous dissipation being ignored , the free energy release rate would be equivalent to strain energy release rate .

提出了基于流体动力学的简化模型，利用静水压力和粘性耗散力的表达式阐明了初始扰动的消失和剪切增稠效应的关系。

The expressions of hydrostatic force and viscous dissipative force were employed to clarify the relationship between the hole disappearance phenomen and shear thickening effect .

根据已有的分析给定了一个粘性耗散在微细管道流中造成明显影响的最小标准值。

A criterion to draw the limit of the significance of the viscous dissipation effects in the microchannel flows is suggested based on the present analysis .

基于剪切功率的耗散机理，提出了一种计算振动剪切流场中聚合物熔体动态黏度的粘性耗散法，并建立了理论模型。

Based on dissipation mechanism of shearing power , a new method of modeling dynamic viscosity of polymer melts in vibrating shear flows was proposed in this paper .

本文引入耗散函数对间隙泄漏流动的粘性耗散进行评估，这种方法是对粘性影响带来的粘性耗散的最简单也是最直接模拟和计算方法。

This idea seems to be the simplest and at the same time , the most straightforward approach to simulate and calculate the viscous loss caused by viscous effects .

对于流动过程，是否考虑压力功及粘性耗散的作用分别对应于绝热与等温流动的情况。

As to the compressible tubal flow , whether or not taking into consideration the effect of reversible work and viscous dissipation correspond to adiabatic and isothermal flow respectively .

相同工艺参数下，提高超声振动功率和频率均使得微通道中聚合物熔体流动时粘性耗散作用增强，出口温度升高。

At the same process parameters , outlet temperature will raise with the viscous dissipation increases by improving the ultrasonic vibration power and frequency when polymer-melt flows in the micro channel .

考虑对流换热后的实验测量结果与数值模拟结果、理论计算结果有较好的一致性，证明了粘性耗散理论模型的合理性。

Experimental measurements after considering the convective heat transfer and numerical simulation results and theoretical calculation results have good consistency , thus it proves the rationality of the viscous dissipation theory model .

该方法考虑了粘性耗散和热传导带来的损失，即使在高频、高驻波比情况下也能得到准确的测量结果。

Since this method took into account the loss caused by viscosity and heat exchange , it could obtain accurate results even in the situation of high frequency and high standing wave ratio .

分别根据这两种优化准则，用变分方法推导了在粘性耗散一定的条件下，稳态无内热源的层流对流换热的场协同方程，并对方腔内对流换热问题进行了优化。

Under the condition of constant viscous dissipation , the field synergy equations are induced for steady laminar convective heat transfer by the variational principle to optimize convective heat transfer in square cavity .

在粘性耗散一定的条件下，以热量传递势容耗散取得极值为优化目标，利用变分方法可以导出稳态层流对流换热的场协同方程。

When viscous dissipation is constant , Field Coordination Equation of steady laminar convection heat transfer can be derived by variation method for the optimization goal of heat transport potential capacity reaching an extreme .

对比实验与模拟结果还发现，熔体流经微通道过程中，其出口熔体温升是粘性耗散与通道壁面热传导综合作用结果，实际粘性耗散生热量高于实验测量值。

Besides , we can see that outlet temperature rise is the result of combination of viscous dissipation and channel wall heat conduction , when melt flows through micro channel . And the actual viscous dissipation calorific value is higher than the experimental measurement .

但是由于频率升高、物理尺寸减小使得粘性耗散增大，且缺乏合适的声驱动器导致无法实现微型热声制冷机的工程化应用。

However , there are many challenges in the engineering application research of the miniature thermoacoustic refrigerator which come along with the frequency rising and dimension decreasing , for example , the increasing of viscosity losses and lacking of suitable high sound pressure driver .

从碰撞开始到熔滴沿焊盘交界线方向达到最大铺展的过程中，动能减小，粘性耗散增加，表面能先减小后增加，熔滴的重力势能很小可以忽略。

During the period from the solder impacting to the maximum solder spread is reached , the kinetic energy decreases , the viscous dissipation increases , the surface energy decreases first and then increases , and the gravitational potential energy has a small value and can be neglected .

本文是在欧拉方程求解器的基础上，通过加入粘性（耗散）项，把流场的主控方程由欧拉方程（Euler）改为NS方程，然后引入两方程湍流模型，使其封闭。

The NS solver is developed from Euler equation code by adding viscous terms and two-equation turbulence models .

为了获得壁面边界的速度滑移和温度阶跃，在含有粘性热耗散的热格子模型的基础上，提出了一种新的直接基于宏观量的边界处理格式。

In order to capture the velocity slip and temperature jump at wall boundary , a novel treatment scheme is presented on the basis of the macroscale variables directly .

在同样的剪切温度下，粘弹性参数和胶凝温度随粘性流动能量耗散增加而急剧降低直至达到稳定状态；

At the same shear temperature , the strength of waxy structure decreased rapidly and finally tended to a steady state as the energy dissipation of viscous flow increased .

在同样的粘性流动能量耗散下，剪切温度越接近测量温度，储能模量和耗能模量越低，胶凝温度越低；

Under the same energy dissipation of viscous flow , when the shear temperature was close to the measuring temperature , the low storage modulus , loss modulus and gelation temperature would emerge .

高粘性牛顿流体粘性耗散的快速计算方法

A Rapid Method for Calculation of Viscous Dissipation in a Highly Viscous Newtonian Liquid

隐式矢通量分裂格式不需人工粘性项与人工耗散项，可以计算跨声速流场，也可以较准确地捕获激波。

Without artificial viscosity and dissipation , implicit flux vector splitting scheme can predict the transonic flow field and capture the shock wave accurately .