Kuiken 利用相似变换,得到如下非线性微分方程 满足如下边界条件 其中, 表示对 求导, 为普朗特数. 此方程是耦合的非线性边值问题,在无穷远点具有奇性. 当 时,使用Matlab的bvp4c求解如下: 将原方程转化为一阶方程组 % kuikenode.m function df=kuikenode(eta,f) sigma=1; df=[ f(2) f(3) f(2)^2-f...
번역 이동:Walter Roberson2024년 9월 3일 In my problem i have 11 varaible of y but only 9 boundary conditions what can i do here? Another additional problem is equation 3 and 4 both contain θ₂ and φ₂ how do i write y9' and y11' for them? in...
Copy Code Copy Command Solve a second-order BVP in MATLAB® using functions. For this example, use the second-order equation y′′+y=0. The equation is defined on the interval [0,π/2] subject to the boundary conditions y(0)=0, y(π/2)=2. To solve this equation in MATLAB, you...
Open in MATLAB Online Try this code following John's suggestion: %Constants hb = 6.626e-34/(2*pi); m = 9*1.660538921e-27; w0 = 2e6*2*pi; Cc = (1.6e-19)^2/(4*pi*8.854e-12); R = 10; gammam = 1; gammap = (3*R^3/(R^3+2))^(1/4); ...
while defining ode function for my bvp solve, I write the code as functiondydx = odefun2(t, y, params) lambda = params.lambda; a = params.a; f = params.f; mu_1=params.mu_1; mu_2=params.mu_2; y1 = y(1);% y y2 = y(2);% x ...
Open in MATLAB Online how to get second solution from this code.I ploted first solution for different values of alpha. ThemeCopy function Ibrardual clc clear all Nt=0.5; Nb=0.5; Le=2; Pr=1; alpha=-0.2138; s=1; A=1; %% solution in structure form %First solution sol = b...
while defining ode function for my bvp solve, I write the code as functiondydx = odefun2(t, y, params) lambda = params.lambda; a = params.a; f = params.f; mu_1=params.mu_1; mu_2=params.mu_2; y1 = y(1);% y y2 = y(2);% x ...
MATLAB的bvp4c计算的是什么雅克比? 、 我正在尝试用MATLAB的bvp4c来调试我的“奇异雅可比”问题。我的问题是:哪些雅可比人正在被评估?我们有常微分方程y‘= f(x,y)的非线性系统。我假设f_i关于y_j的导数被放入一个矩阵中,并在y的某个值上求值。也许这个矩阵对于bvp4c算法来说应该是可逆的,尽管我发现该算法...
bvp4c is a finite difference code that implements the three-stage Lobatto IIIa formula. This is a collocation formula and the collocation polynomial provides a C1-continuous solution that is fourth order accurate uniformly in [a,b]. Mesh selection and error control are based on the residual of...
产生这个问题可能和数据库配置的不佳，或者应用程序组件中的缓冲池调整，增加更多的应用等等，或者因为突发...