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If anyone can do it please help me in this regard

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Muhammad Adeel Ahsan Awan
评论： Muhammad Adeel Ahsan Awan 2018-12-19
Stream function is given by:
With the help of MATLAB, plot the streamlines for the following parameters:
  1. V = 1 m/s
  2. a= 0.1 m
  3. Ψ = -0.16 to 0.16 (with a step of 0.02)
  4. 0o < θ < 180 o(with a step of 1o)
Set the limits of plot to -0.4 < x < 0.4 and 0 < y < 0.4
  1. Plot velocity vectors at a few points and comment on their orientation with respect to streamlines.
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Muhammad Adeel Ahsan Awan
Muhammad Adeel Ahsan Awan 2018-12-16
a=0.1
v=1
s=-0.16
t=0
while s<0.16 && t<180
r=(-s)+((s*s)+(4*a*a*v*v*sin(t)*sin(t))^(1/2))/(2*v*sin(t))
x=r*cos(t);
y=r*sin(t);
s=s+0.02;
t=t+1;
plot(x,y,'r-')
xlim([-0.4 0.4])
ylim([0 0.4])
end

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采纳的回答

Mark Sherstan
Mark Sherstan 2018-12-16
You were plotting a single point instead of an array of information. Adding the ii term stores the result for each calculation and the plots it. The following code should now work for you:
a=0.1
v=1
s=-0.16
t=0
ii = 1;
while s<0.16 && t<180
r=(-s)+((s*s)+(4*a*a*v*v*sin(t)*sin(t))^(1/2))/(2*v*sin(t))
x(ii)=r*cos(t);
y(ii)=r*sin(t);
s=s+0.02;
t=t+1;
ii = ii + 1;
end
plot(x,y,'r-')
xlim([-0.4 0.4])
ylim([0 0.4])
This is also how you should post code so that people can help you (not just copying and pasting the text). If this solves your original question, please accept the answer so that we can close it, otherwise add further comments below.
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