且当表观气速增大，初始流体流动处于由均匀流型向过渡流型的转变，轴向液体速度在径向的梯度非常小；
With increasing of superficial gas velocities, the liquid flow regime was changed from homogeneous to transitional and radial gradient of axial liquid velocity was rather small.
在恒定热流密度条件下，对单相流体分别强制轴向层流流经多孔泡沫金属换热器管内、外的流动和对流传热的均匀性进行了分析。
The distributions of velocity and temperature of fluid inside the tube fitted with the porous metal foam were more uniform than that of the blank tube.
使用计算流体力学软件FLUENT，模拟均匀来流绕固定圆柱的流动，模拟雷诺数为20,40,100时的绕流流动，得到流场的流函数等值线图和速度矢量图。
Uniform flow around a mounting cylinder is simulated with the application of FLUENT software while Reynolds number is 20, 40,100. Stream function and velocity vector distributions are indicated.
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