fdtd42

F-K域偏移法和相移法偏移程序（C语言）(FK domain migration method and the phase- shift method migration program (C language))

一元线性回归，数值分析方面可参考(one yuan linear regression, numerical analysis can look at the reference)

椭圆偏微分方程求解函数，调用该函数可以解任意椭圆偏微分方程(Elliptic partial differential equations to solve the function, call this function can solve any elliptic partial differential equations)

共轭梯度法（Conjugate Gradient）是介于最速下降法与牛顿法之间的一个方法，它仅需利用一阶导数信息，但克服了最速下降法收敛慢的缺点，又避免了牛顿法需要存储和计算Hesse矩阵并求逆的缺点，共轭梯度法不仅是解决大型线性方程组最有用的方法之一，也是解大型非线性最优化最有效的算法之一(Conjugate gradient method (Conjugate Gradient) is between the steepest descent method and Newton' s method between a method that takes only a first derivative information, but to overcome the slow convergence of the steepest descent method shortcomings, but also avoid the need to store Newton and computing the inverse Hesse matrix and disadvantages, conjugate gradient method is not only to solve large linear equations of the most useful methods, large-scale nonlinear optimization solution is the most efficient algorithms)

基于matlab计算流体力学(CFD)源代码。(Matlab-based computational fluid dynamics (CFD) code.)

用LBM结合非平衡外推方法实现的圆柱绕流，柱面边界以非平衡外推方法实现。(LBM combined with the extrapolation method of achieving non-equilibrium flow around a cylinder, cylinder boundary to achieve non-equilibrium extrapolation method.)

计算材料学中用相场法模拟凝固相变以及晶粒长大的开源性程序(Computational Materials Science solidification using phase-field simulation of grain growth phase transitions and open-source program)

计算流体力学讲义（基础篇） 任玉新（清华大学工程力学系 流体力学研究所）(The computational fluid dynamics notes (foundation article))

说明：  一个虎门大桥涡街的udf和fluent仿真教程，适合初学者(A fluent udf example)

用于焊接模拟的fluent的双椭球体热源UDF程序。(For welding simulation fluent double ellipsoid heat source UDF program.)