| 1. | The numerical solution would be a good approximation of the original solution restricted in the computational domain
将该计算结果作为原问题在有界计算区域上的数值近似解。 |
| 2. | Then we can reduce the original problem to a boundary value problem defined on the bounded computational domain
这样我们可以将原无界区域上的定解问题约化为定义在有界计算区域上的边值问题。 |
| 3. | In this scheme , the computational domain is first divided into two sub - domains , inner domain near the building ' s surface and outer domain far away from the building
网格剖分时，首先将计算区域划分为紧靠建筑物表面的内层区域和离建筑物较远处的外围区域。 |
| 4. | The mathematical model based on gis is built , and the interface program of data conversion between the two models is designed , and the spatial discretion of the computational domain is discussed
在此基础上，建立了基于gis的泥沙数学模型，设计了两种模式数据交换的接口程序，探讨了泥沙模型计算域空间离散问题。 |
| 5. | Only clouds of points instead of grids are distributed over the computational domain and the spatial derivatives of the considered partial equations are estimated using a least - square curve fit on local clouds of points
与传统的网格方法不同，无网格方法的核心是用“点云”离散求解区域，并基于当地点云离散结构，引入二次极小曲面逼近空间导数。 |
| 6. | Namely for the given problem we introduce some suitable artificial boundaries to divide the unbounded physical domain into the bounded computational domain and unbounded part and set up high order artificial boundary conditions on the given artificial boundaries
也就是，对于给定的问题通过引入适当的人工边界，将物理区域分为有界计算区域和无界部分并且在该人工边界上建立高精度的人工边界条件。 |
| 7. | A novel strip - coil - baffle structure used to enhance heat transfer and support the tube bundle for a tube - shell heat exchanger is proposed . the new structure can sleeve the tubes in bundle alternatively to create a vortex flow in a heat exchanger . the numerical simulation on the flow and heat transfer characteristics for this new structure heat exchanger is conducted . the computational domain consists of two strip - coil sleeved tubes and two bare tubes oppositely placed at each corner of a square . the velocity and temperature fields in such strip - coil - baffled channel are simulated using fluent software . the effects of the strip - coil - baffles on heat transfer enhancement and flow resistance in relation to the reynolds number are analyzed . the results show that this new structure bundle can enhance the heat transfer coefficient up to a range of 40 ? to 55 ? in comparison with a bare tube bundle ; meanwhile , higher flow resistance is also accompanied . it is believe that the strip - coil - baffled heat exchanger should have promising applications in many industry fields
介绍了一种用于强化管壳式换热器壳侧传热和支撑管束的螺旋折流片新型结构,该结构是对换热器管子相间地套上螺旋折流片以产生旋涡流动.研究模型是在正方形布置的4个管子中的2个对角管子套上螺旋折流片后形成的通道,利用fluent软件对该上述四管通道模型的流场和温度分布情况进行了数值模拟;分析了四管通道模型中螺旋折流片对强化传热和流动阻力随雷诺数的变化关系的影响.算例结果显示该新型结构可比相同尺寸的光管通道中的情形传热系数提高约40 ? 55 ? ,同时也将伴随较高的流动阻力.可以相信螺旋折流片式换热器将会在许多工业领域有良好的应用前景 |
| 8. | In order to validate the feasibility of the novel algorithm , ultrawide band pulse wave is used as incident wave . computational domains are limited by absorbing boundary condition . the transformation technique from near zone to far zone is used when the sampling spot is outside of the computational domains
时域成像技术以超宽带脉冲源作为入射波源，用吸收边界条件来界定计算域，而当采样点远离计算区域时，需要通过近?远场的转换技术把近场等效面上的信息转换到远场，本文采用简单而实用的柱面波外推法作为近?远场的转换方法，收到了较好的效果。 |
| 9. | After the coordinate transformation , the discrete velocity boltzmann equation is solved directly in computational domain to preserve the geometry of body . the results comparison of cylindrical couette flow at different size meshes , different lattice bgk models and different algorithms shows that , not only the precision of the incompressible lattice bgk model is satisfactory , but also the curvilinear coordinate algorithm is efficient
首先计算了存在理论解的圆柱couette流动，并针对不同数目的离散网格、不同格子模型以及不同坐标系算法，对结果进行了比较，不仅再次印证了本文第四章给出的不可压格子模型具有满意的计算精度，而且表明本章的贴体坐标算法是行之有效的。 |
