MATLAB: Plotting Velocity p m m m

differential equationspdeplotting

Hi, I have to generate a velocity potential and streamline as the one shown in the fig below. Can any one please indicate the appropriate code for that? Thanks

Best Answer

This is a boundary value problem. You need to have the initial and boundary conditions to develop the velocity field required for this.

Otherwise, you need to have the velocity field itself to calculate the velocity potential and draw streamlines.

Once you have the velocity field, you can draw the streamlines.

doc streamline

and the velocity potential could be drawn as filled contour below the streamlines.

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MATLAB: Datenum with a.m. and p.m.

Assuming there is ".m. EST" attached to each "timestamp" at the end. You can follow the steps:

Step-1 Replace ".m. EST" to just "m" (Hint : regexprep)

Step-2 Convert the output into the date numbers (Hint: datenum)

You should get the output with date numbers in a array. (Not sure what do mean by "continuous"?)

MATLAB: Ground motion velocity in matlab

if you have the acceleration vector , you can integrate it to get the velocity, here is a simple example :

t=0:0.1:2; % time
a=2*t; % linear acceleration
v=integral(a,0.2); %  velocity
plot(a), hold on, plot(v,'r')

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MATLAB: Datenum with a.m. and p.m.

MATLAB: Ground motion velocity in matlab

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