How can I plot the exported ASCII file from fluent?

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mathru 2020-6-12

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https://ww2.mathworks.cn/matlabcentral/answers/546896-how-can-i-plot-the-exported-ascii-file-from-fluent

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

采纳的回答

Rik 2020-6-12

3
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https://ww2.mathworks.cn/matlabcentral/answers/546896-how-can-i-plot-the-exported-ascii-file-from-fluent#answer_450141

在 MATLAB Online 中打开

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)

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.

Mohamad Zulhisyam 2022-5-25

Here is the link for the question https://www.mathworks.com/matlabcentral/answers/1726920-how-can-i-display-4th-dimensional-plot-using-ascii-data-from-ansys-fluent

Thank you.

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更多回答（1 个）

Ameer Hamza 2020-6-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/546896-how-can-i-plot-the-exported-ascii-file-from-fluent#answer_449936

在 MATLAB Online 中打开

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;

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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 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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