Does anyone know why not all of my streamlines complete themselves?
4 次查看(过去 30 天)
显示 更早的评论
close all; clear;
x = -100:.05:100; y = -100:.05:100;
[X,Y] = meshgrid(x,y);
%positive charge at x =0 y = 0
u = 25*X./(X.^2 + Y.^2).^1.5; %x-hat
v = 25*Y./(X.^2 + Y.^2).^1.5; %y-hat
%negative charge at x=0 y=-5
u2 = -30*X./(X.^2 + (Y+5).^2).^1.5; %x-hat
v2 = -30*(Y+5)./(X.^2 + (Y+5).^2).^1.5; %y-hat
%creating streamline starting points
%in a circle about the positive charge
theta = 0:pi/9:2*pi;
startx = 1*cos(theta);
starty = 1*sin(theta);
%plot the streamlines in the X-Y Plane
figure;
streamline(X,Y,u+u2,v+v2,startx,starty)
0 个评论
采纳的回答
Rahul Kalampattel
2017-3-4
编辑:Rahul Kalampattel
2017-3-4
If you check out the documentation for the streamline function, you'll see that you can specify the maximum number of vertices the streamline will have (i.e. how long each streamline is).
By changing the last line of your code to this:
streamline(X,Y,u+u2,v+v2,startx,starty,[0.1,20000])
where 0.1 is the step size (default) and 20,000 is the max number of vertices, the plot looks like this:
0 个评论
更多回答(1 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Vector Fields 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!