| 1. | Basic flow equation
基本流动方程 |
| 2. | For the purpose of simulating aerodynamically determined body motion , the governing equations of rigid body dynamics are coupled in the overall solution algorithm
本文还研究了刚体动力学方程与流动方程的耦合求解方法，用于模拟由气动力决定的物体运动轨迹。 |
| 3. | Seawater intrusion is modelled as a nonlinear system of coupled two parabolic partial differential euqaitons , of which one is the pressure flow equation and the other one is the concentration equation of convection - dispersion type
摘要海水入浸问题的数学模型是两个耦合抛物型偏微分方程，其中一个是关于压力的流动方程，另一个是关于浓度的对流扩散方程。 |
| 4. | For the practical application to the engineering problems , the computation efficiency of solving the flow equation must be significantly improved besides of the accuracy of solver and the accuracy of methods itself
但气动优化设计要能作为一个工具真正应用到工程实际中，除了要改进设计方法和提高流动方程求解精度外，流动方程的求解效率也是一个亟待解决的问题。 |
| 5. | Abstract : based on the establishment of physical model , this paper used a two - dimensional calculation model to numerically calculate and analyzed the heat transfer process of the two - phase flow within the conduit of single evaporator in cpl
文摘:在建立物理模型和分析管内流动状态并列出基本流动方程的基础上，采用一个二维计算模型进行数值计算，求得管内汽-液相的速度和压力分布。 |
| 6. | In order to advance the sst turbulence equations at the same rate as the flow equations , a point - implicit scheme is used . the convection term in turbulence equations is discretized using first - order upwinding scheme to ensure more stability in time integration and the positivity of the turbulent variables
Sst湍流方程求解时,使用点隐式格式进行时间推进从而解除了由于源项存在所引起的时间步长的限制,保证湍流方程和流动方程同步推进时的稳定性。 |
| 7. | ( 3 ) in terms of flowing characteristic of drilling fluids on the roller screen , the flowing equations at the axis direction and the tangent direction and the flowing through the screen , and the continuously flowing equation of drilling fluids are built . the characteristic - difference equations of flowing model for drilling fluids are given and the theoretical analysis is made
( 3 )根据钻井液在筒式筛网上的流动特点，建立了筒式筛网上钻井液沿轴线方向流动、周向流动和透筛流动的流动方程，以及钻井液的连续流动方程，利用特征线法写出了筒式网上钻井液流动模型的特征差分方程，并作了理论分析。 |
| 8. | In the forth chapter , the performances of mr dampers designed and fabricated at chongqing university have been tested in national center for test and supervision of coach quality , including schematics of damping force vs . displacement of piston head , damping force vs . velocity of piston head , etc . for some given electric currents of the coil . the experimental results demonstrate that damping force offered by mr damper consists of background damping generated by resistance of mr fluid and damping caused by magnetic field
对不同励磁电流条件下的理论阻尼力与测试阻尼力进行了比较，分析了产生误差的主要原因；对阻尼器产生温度效应产生的主要原因进行了分析，提出了应该提高磁流变体的温度稳定性；推导了磁流变体的感性和容性流动方程，从理论上分析了磁流变体的感性和容性对阻尼器特性的影响。 |
| 9. | In order to improve the efficiency of the mesh generation , we employ the transfinite interpolation method . in low speed flow ( m < 0 . 05 ) , the low mach will aggravate the difference between eigenvalues of the system and make the convergence sharply difficult . as for this , we use the preconditioning method to remove it
另外，我们求解的是极低马赫数下的流场( m 0 . 05 ) ，极低的马赫数会导致可压流动方程十分僵硬而难以收敛，对此，我们对n - s方程进行了矩阵预处理。 |
| 10. | The flow equations are solved using finite difference technique . using body - fitted curvilinear coordinate system treated the boundary conditions . by iteratively solving the flow governing equation and the blade equation , the design of axial flow pump impeller in the quasi - three - dimensional rotational flow can be performed according to the angular momentum distribution , the blade which was designed in the lifting method , flow channel and the blade thickness given
其次在流动无粘性、不可压及考虑叶片厚度的条件下，依据叶轮内的流动特性，推导了叶轮内三维流动周向平均流动控制方程以及叶片方程；在贴体坐标系中，采用有限差分法求解流动方程和叶片方程；在采用升力法设计出的叶片作为初始叶片、给定叶片速度矩分布、叶片厚度分布和叶轮轴面流道几何形状条件下，迭代求解流动控制方程及叶片方程，实现了轴流泵叶轮的准三维方法设计。 |
