The nonlinear decoupling approximation is used to calculate numerically the effective linear dielectric function and third order nonlinear effect of metal particle composite media as function of random volume fraction, especially the high volume fraction, which show the nonlinear optimum volume ratio. 利用退耦近似方法,数值研究了任意体积分数特别是高体积分数的金属颗粒复合介质膜的有效线性介电函数和三阶非线性效应的变化,得到了非线性增强的最佳体积比。
The governing heat transfer equations are solved numerically and effective thermal conductivity is calculated from the steady-state results. Results of subscale engine test show that the insulation ( PFDH-2 ) can be used for heat protection of oxidizer rich solid rocket engine chamber. 通过数值求解传热方程,计算了稳态的有效热导率。试车结果表明,PFDH-2绝热层可以对富氧环境下工作的发动机燃烧室实施有效热防护。
In the weak nonlinearity limit, we calculate numerically the effective linear dielectric function ( ε 0 e ) and optical nonlinearity ( χ e ) as functions of the volume fraction of insulator inclusions ( f ). 在弱非线性条件下,数值研究了体系的有效线性介电函数和光学非线性随体积分数的变化,并发现体系的线性介电函数比光学非线性更依赖于绝缘颗粒组分的体积分数。
Finally, two examples are computed numerically, and the experiment results show that the algorithm is effective. 最后,对两个算例进行了数值计算,实验结果证明了算法的有效性。
As compared with the variational method, the results indicate that the method in this paper not only improves the numerically computational precision, but reduces the computational memory and time. The simple and effective method is provided for the calculation of eddy current in the project. 结果表明:该方法不但数值计算精度高,而且使计算存贮和计算时间大量降低,为工程中的矩形薄板涡电流计算提供了一种简单而又有效的方法。