How to plot streamline for velocity data??

Hi,

I need to plot velocity vectors along with streamline. For velocity vectors, I have used quiver() as shown below which works properly, please let me know how to plot streamlines.. I have attached velocity data for your reference.. Please help me with this..

skip=2;
ff=quiver(x',y(1:skip:end),Um(1:skip:end,:),Vm(1:skip:end,:));

Answer 1

[KSSV]

https://in.mathworks.com/help/matlab/ref/streamline.html

[Turbulence Analysis]

Hi,

Thanks. I have used as follows, but not getting the proper streamline.. I guess, I am not defining startx, starty in a correct way..

skip=2;
ff=quiver(x',y(1:skip:end),Um(1:skip:end,:),Vm(1:skip:end,:));
ff.Color='black';
ff.AutoScaleFactor=12;
set(gca, 'YDir','normal')
startx = -40:40;
starty = 0:80;
streamline(x,y,Um,Vm,startx,starty);

Answer 2

[darova]

try this

clc,clear

[x,y,z] = peaks(20);            % some data
[u,v] = gradient(z);            % create direction vectors

t = linspace(0,2*pi,5);
[sx,sy] = pol2cart(t,2);        % start position (circle)
h = streamline(x,y,u,v,sx,sy);  % display streamlines
hold on
for i = 1:length(h)             % loop through all streamlines
    x1 = get(h(i),'xdata');     % get data
    y1 = get(h(i),'ydata');
        % u and v vector fields are known
    u1 = interp2(x,y,u,x1,y1);  % interpolate vector field at streamline position
    v1 = interp2(x,y,v,x1,y1);
    quiver(x1,y1,u1,v1)
end
hold off