A more detailed multi fluid model was developed with the gas phase divided into several groups according to bubble size to describe bubbly flow in a vertical pipe.
根据气泡的尺寸划分气相，采用时间平均法建立了描述垂直管道内层流泡状流运动的多流体模型。
It is based on the physical model of exhausted gas bubble and numerically simulates the entire flow field by coupling calculation of the water field and gas field.
计算采用燃气泡物理模型，通过水流场和气流场的耦合计算模拟整个流场的形态。
When the second derivative of the bubble number in unit bed volume with respect to gas velocity equals zero, the flow regime transition occurs. The model fits fairly well with the experimental data.
导出了当单位床层体积中气泡数目对气速的二阶导数为零时发生流型转变，该模型的计算机结果与实验数据吻合良好。
Then physical and mathematical model of the gas-liquid two phase flow which was actuated by the bubble in the pool, were proposed and solved numerically.
在此基础上建立池内有气泡驱动情况下气液两相流动传热的物理数学模型，并进行相应的数值求解和分析。
It is also indicated that the complete mixing model is feasible to describe the fluid flow states in both gas and liquid phases in a short bubble column.
研究结果表明，在短的鼓泡塔中，应用全混流模型来描述气相和液相的流体状态是可行的。
Recently a new model, gas-bubble expansion and migration model, has been widely accepted by geologists.
近年来，一种新的模式：气泡膨胀与迁移模式得到了地质学家的广泛引用。
Recently a new model, gas-bubble expansion and migration model, has been widely accepted by geologists.
近年来，一种新的模式：气泡膨胀与迁移模式得到了地质学家的广泛引用。
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