Multi - grid - blocks , finite volume method , maccormack difference method was used to solve the unsteady two - dimensional navier - stokes equation , finite difference method was used to solve the two - dimensional heat transfer problem 数值计算方面,以多块网格为特征的s2df程序采用有限体积法, maccormack离散格式求解二维、非定常n - s方程,利用有限差分方法求解二维热传导方程。
In the paper , a numerical model of the interior flow of the submarine - based missile underwater launching is established . simulation of the interior flow of submarine - based powerless missile underwater launching is performed by applying the finite volume method 本文建立了潜射导弹水下发射的内流场数学模型,采用有限体积法( fvm )对无动力导弹潜艇发射时的内流场进行了模拟计算。
4 ) the euler equation is solved for the combination of wingbody by means of the finite volume method on the unstructured grids . several methods are used for quick convergence and the results are in correspondence with the experiment data ( 4 )应用格心格式的有限体积法对翼身组合体绕流进行了euler方程的数值模拟,同时引入各种加速收敛措施,与实验相比,得到了较为满意的计算结果。
Fluent is based on finite volume method , which is different form the widely used traditional analytical solution and numerical method based on finite element method and finite difference method , and its advantage is the high computational efficiency and precision 目前针对径向轴承和止推轴承静特性的研究,多采用简化的解析方法或数值解法,数值解法主要是有限元法和有限差分法,计算效率较低。
In the dissertation , the unstructured dynamic mesh technique is investigated . full implicit dual - time temporal derivatives and cell - center finite volume method spatial derivatives are adopted to simulate unsteady flow fields of 2 - d airfoil , 3 - d wing and wing - body configuration 在非结构运动网格技术方面,本文发展了一种适用于解决非定常气动力计算的、高效的、鲁棒性较好的非结构运动网格方法。
A fluid - thermal - structure coupled analysis technique needs to be developed for advanced engine design . presently , fluid flow and heat transfer is mainly analyzed using finite volume method ( fvm ) and structural deformation is often solved by finite element method ( fem ) 由于历史原因,目前在流体流动和传热分析中广泛采用的是控制容积法,而在弹性变形的分析上采用的是有限元法,并分别发展了相应的工程应用软件。
Dued to the importance of the flow around the blunt bodies both in the theoretical study and in practice application , the two - dimensional numerical simulation for flow around square cylinder is performed , using pseudo - compressibility method and finite volume method ( fvm ) in the paper 鉴于钝体绕流在理论研究和实践中所具有的重要意义,本文尝试采用人工可压缩方法和有限体积离散方法,实现对方柱绕流流场的数值模拟。
In this paper this problem is calculated by using finite volume method that prouduce though finite difference method and finite element method , and obtained the velocity and pressure distribution , through the compare between numerical result and model experiment result , there is very good inosculation 本文利用有限差分法和有限元法所派生出的有限体积法对其进行数值计算,求解出计算区域的速度及压力分布,数值计算结果与模型试验结果吻合较好。
Scramjet inlet is of great importance in the hypersonic airbreathing propulsion system and plays significant role in the realization of hypersonic flight . full 3 - dimensinal n - s equations are solved by using finite volume method , second - order harten - tvd spatial scheme , and algebraic baldwin - lomax turbulence model 本文基于favre质量加权平均的三维navier - stokes方程,采用有限体积法、二阶的tvd格式进行流场求解,并使用了bladwin - lomax代数湍流模型。
4 . a 2 - d and 3 - d euler equations and n - s equations are solved using the cell - centered finite volume method and four - step runge - kutta scheme on the cartesian grids with standard convergence acceleration techniques such as local time stepping , enthalpy and implicit residual smoothing 使用jameson中心有限体积法和runge - kutta时间推进方法,求解了关于二维、三维复杂流场的euler 、 navier - stokes方程,采用了当地时间步长、隐式残值光顺等多种加速收敛方法。