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July 5, 2012, 16:59 
Export/Import data contour plots with Matlab

#1 
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Casey
Join Date: Jun 2009
Posts: 98
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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 

August 16, 2012, 20:15 

#2 
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Negin Nazarian
Join Date: Jan 2012
Location: San Diego
Posts: 61
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Hi
I have the same problem as yours. Do you remember how you solved this? any help is appreciated. Cheers Negin 

August 20, 2012, 09:51 

#3 
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Casey
Join Date: Jun 2009
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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.


July 27, 2017, 07:56 

#5 
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ehsan
Join Date: Sep 2014
Posts: 38
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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, xcoor, ycoor, contour parameter) Regards Ehsan 

September 6, 2017, 08:46 

#6 
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Bauta Steen
Join Date: Aug 2017
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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.


June 23, 2020, 12:44 
could you send me the code for me to understand it，I have uploaded the data， please h

#7  
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dega
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Quote:


October 26, 2020, 14:48 

#8 
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October 27, 2020, 11:54 
Do you have other methods except for the matab,I have not used the surface plot befor

#9 
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dega
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October 27, 2020, 11:57 

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October 28, 2020, 10:27 
Could you send me one code example for me ,thank you.

#11 
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dega
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October 28, 2020, 11:06 

#12 
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Join Date: Jul 2019
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Hi, I use the few lines of code below.
Code:
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); %xcoordinates y = m(:, 2); %ycoordinates 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 

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