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How can I plot the exported ASCII file from fluent?

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mathru
mathru on 12 Jun 2020
Edited: mathru on 13 Jun 2020
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

Accepted Answer

Rik
Rik on 12 Jun 2020
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)

More Answers (1)

Ameer Hamza
Ameer Hamza on 12 Jun 2020
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 Comments
mathru
mathru on 12 Jun 2020
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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