通过对描述沙粒垂向运动速度脉动分量的随机微分方程的直接求解，获得了风沙流中沙粒运动的随机轨迹。
Stochastic sand trajectories in wind-blown sand were obtained by solving the differential equation which describes the vertical fluctuating velocity of sand grains.
本文通过求解灾变磁场作用下刚性直圆管脉动流的运动方程，得到了它的分析解。
In this paper, the analytic solution of the dynamical equation of the pulsatile flow in a rigid round tube under the low-frequency varying magnetic field is obtained.
当脉动幅度与平均磁场强度之比为有限值时，在一般情况下，控制方程中的非线性项不能略去，因而不能用WKB解来描述有限振幅脉动幅度的径向变化。
When the amplitude of the fluctuation is finite with respect to the average magnetic field intensity, the nonlinear terms in the garvening equations can not be droped and the WKB aproxima-tion fails.
以直管科里奥利质量流量计为研究对象，给出被测流体脉动时测量管的振动微分方程，讨论了方程的求解过程。
The vibrational equation of the tube was given with the straight tube Coriolis mass flow meter as the investigated object, and the solving process is discussed.
从颗粒运动的PDF(概率密度分布函数)输运方程出发建立颗粒相的质量、动量和脉动速度二阶矩方程。
Equations of mass, momentum and second moments for particulate phase are derived from a particle PDF (probability distribution function) equation in dilute turbulent sediment-laden flows.
使用集总参数非线型模型来分析蒸发管中汽液两相流压力降型脉动，结果表明：压力降型不稳定性可以用二阶常微分方程来描述。
The pressure drop pulsation is analyzed by using a lumped parameter nonlinear model. The results show that the pressure drop type instability can be described by a second-order differential equation.
根据摆线泵的啮合线方程，建立了用几何法求解摆线泵的瞬时流量、排量、流量脉动率的数学模型。
Based on the equation of action line for cycloidal pump, a geometrical mathematical model is built to solve instantaneous flow, displacement, average flow and the pulsation of the pump.
从简化的颗粒运动方程出发，分析了在剪切流场中颗粒脉动强度和流体脉动强度之间的关系。
The relationship between turbulent intensity of particles and those of the carrier fluid was studied theoretically based on simplified particle motion equation.
此方程将脉动流速分解为三个组成部分，并且据此导出脉动应力分解方程。
According to the above work, the Renolds-stress is resolved into serval parts, and the composed equation of Renolds-stress is derived.
从两相流运动方程出发，研究了细小悬移质颗粒的存在对水流脉动强度的影响。
Based on the equations of two-phase flow, the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water.
利用有限元法求解声学波动方程，建立了管内气流的有限元运动方程，计算出管内气柱的固有频率和气流压力脉动。
The FEM equation of acoustic wave is used to calculate the air-current natural frequency and pressure pulsation in the pipeline.
根据雷诺时均方法，建立了荷电两相湍流的时间平均雷诺方程组，并对其中的脉动关联项进行了模拟。
According to Reynolds-average method, Reynolds-average equations for electrostatic charged two-phase flows are set up, and the model…
根据雷诺时均方法，建立了荷电两相湍流的时间平均雷诺方程组，并对其中的脉动关联项进行了模拟。
According to Reynolds-average method, Reynolds-average equations for electrostatic charged two-phase flows are set up, and the model…
应用推荐