[meangreen]

Hi Everyone,

I would like to make contour plots using matlab from my Fluent data, but I can't figure out how to sort the data so that matlab can plot it. (I am working in 2D and axisymmetric)

Fluent provides one long list of x coordinates, one long list of y coordinates and on long list of variables. But this isn't how matlab wants to plot things.
Has anyone written a function in matlab to rearrange the fluent output so they can plot the contour plots in matlab?

My mesh uses adaption, which makes things complicated.

Casey

[nenazarian]

Hi

I have the same problem as yours. Do you remember how you solved this?
any help is appreciated.

Cheers
Negin

[meangreen]

Still haven't been able to solve it. Let me know if you make any progress. I have been using paraview, but it doesn't provide the same amount of control as I would like.

[blackmask]

You could use interp/interp2/interp3 functions provided by MATLAB to interpolate your result to structured grids. TECPLOT is a better choice than MATLAB for data visualization.

[e_cfd]

you can export any contours from FLUENT to MATLAB following these steps:

1- Export what you want from File\export\solution data. (file type : ASCII and delimiter should be space).

2- use uiopen ('file address',1) in MATLAB.
3- delete characters in the first line of opened script.
4- save it on the previous file (just Ctrl+s)
5- c=dlmread('file address')

Done !
c usually is a N*4 matrix, (node number, x-coor, y-coor, contour parameter)

Regards
Ehsan

[bsteen]

If you have exported your Fluent grid and data in Ascii format you can use the FEATool Matlab FEM Toolbox functions to plot contours on general unstructured grids (as well as perform further postprocessing). A few examples of possible plots and explanation of the syntax is given in this postprocessing tutorial.

[hitzhwan]

Originally Posted by bsteen

If you have exported your Fluent grid and data in Ascii format you can use the FEATool Matlab FEM Toolbox functions to plot contours on general unstructured grids (as well as perform further postprocessing). A few examples of possible plots and explanation of the syntax is given in this postprocessing tutorial.

could you send me the code for me to understand it，I have uploaded the data，I want to put all the data in one data.xlsx, please help me do it. Thank you.

[Bodo1993]

Originally Posted by hitzhwan

could you send me the code for me to understand it，I have uploaded the data，I want to put all the data in one data.xlsx, please help me do it. Thank you.

Hi, I am wondering if you got any clue on how to do the surface plot in MATLAB accurately. Thanks.

[hitzhwan]

Originally Posted by Bodo1993

Hi, I am wondering if you got any clue on how to do the surface plot in MATLAB accurately. Thanks.

Do you have other methods except for the matab,I have not used the surface plot before?

[Bodo1993]

Originally Posted by hitzhwan

Do you have other methods except for the matab,I have not used the surface plot before?

Hi, I actually do the postprocessing with MATLAB. An alternative would be python, but I do not use it.

[hitzhwan]

Originally Posted by Bodo1993

Hi, I actually do the postprocessing with MATLAB. An alternative would be python, but I do not use it.

Could you send me one code example for me ,thank you.

[Bodo1993]

Originally Posted by hitzhwan

Could you send me one code example for me ,thank you.

Hi, I use the few lines of code below.

    
    del_x = ... %element size in the x direction 
    del_y = ... %element size in the y direction 
    m=dlmread('filename.txt'); %reading the data from text file  
    x = m(:, 1);       %x-coordinates 
    y = m(:, 2);       %y-coordinates 
    z = m(:, 3);       %variable
    [X,Y]=meshgrid(min(x):del_x:max(x),min(y):del_y:max(y)); %matlab mesh
    Z=griddata(x,y,z,X,Y); %interpolation 
    contourf(X, Y, Z); %contour plot

Hope it helps.