How can I plot the exported ASCII file from fluent?

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mathru
mathru 2020-6-12
评论： Mohamad Zulhisyam 2022-5-25
Hello,
I have exported the data (ASCII) of a plane from fluent. I want plot the data in MATLAB. It would be great if you can give an idea or share any code to do that.
In that file the data are as following:
nodenumber, x-coordinate, y-coordinate, z-coordinate, phase-2-vof
1, 2.549813583E+00, 3.150000000E+00,-2.192098192E-08, 0.000000000E+00
2, 2.569617473E+00, 3.150000000E+00,-2.192098192E-08, 0.000000000E+00
3, 2.609225254E+00, 3.150000000E+00,-2.192098192E-08, 0.000000000E+00
4, 2.648833034E+00, 3.150000000E+00,-2.192098192E-08, 0.000000000E+00
5, 2.688440814E+00, 3.150000000E+00,-2.192098192E-08, 0.000000000E+00
6, 2.728048594E+00, 3.150000000E+00,-2.192098192E-08, 0.000000000E+00
7, 2.767656374E+00, 3.150000000E+00,-2.192098192E-08, 0.000000000E+00
8, 2.807264154E+00, 3.150000000E+00,-2.192098192E-08, 0.000000000E+00
9, 2.846871934E+00, 3.150000000E+00,-2.192098192E-08, 0.000000000E+00

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采纳的回答

Rik
Rik 2020-6-12
The code below simply ignores the z-values, since there only seems to be a single line in the yz plane that was actually considered.
data = readtable('vof_data2.txt');
x = data.x_coordinate;
y = data.y_coordinate;
z = data.z_coordinate;
p2v = data.phase_2_vof;
resolution=[300 300];
figure(1),clf(1)
subplot(1,2,1)
plot3(x,y,p2v,'.')
xlabel('x')
ylabel('y')
zlabel('phase value')
v=[];[v(1),v(2)]=view(180,90);
title('point cloud')
axis tight
axlim=axis;
%ignore z for now
F=scatteredInterpolant(x,y,p2v,'linear','none');
[X,Y]=ndgrid(linspace(min(x),max(x),resolution(1)),linspace(min(y),max(y),resolution(2)));
Z=F(X,Y);
subplot(1,2,2)
surf(X,Y,Z,'EdgeColor','none')
view(v(1),v(2))
axis(axlim)
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Rik
Rik 2022-5-24
It can probably be done. First you need to load the data, then transform it into a format a display function can understand. The answer above interpolates the data to a surface, but that might not be required for your application.
Please post a separate question, in which you attach an example file, give an outline of what you want to achieve, and show what you have tried so far. Feel free to post a link here.

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更多回答（1 个）

Ameer Hamza
Ameer Hamza 2020-6-12
If this is stored in a .txt file, then you can use readtable like this
data = readtable('test.txt');
x = data.x_coordinate;
y = data.y_coordinate;
z = data.z_coordinate;
p2v = data.phase_2_vof;
  12 个评论
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Rik
Rik 2020-6-12
How would you do it in words? What is the meaning of your image? What do the dimensions and the colors represent?
mathru
mathru 2020-6-12
Well, actually I am simulating (3D model using Fluent) gas jet -liquid interaction in a vessel. The image represents the deformation of liquid upon impinging of gas jet. I have draw a plane (YZ plane) and the image representing the contour of phases on that plane. The red color indicates liquid part of the vessel where blue part is gas phase.

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