Input:

results from solver

output:

circumferential averge physical quantities( such as streamwise velocity)

How to?

1. draw an structured 2D axial meshin Pointwise

a. similar nodes distribution as the mesh  in the solver ( normally unstructured)

b. export as plot3D format

2. interpolate solution results on the 2D plane in Tecplot

a. import the CFD results in Tecplot

b. import the 2D mesh

file /load data/

c. interpolate data on the 2D mesh

d. rotate the 2D mesh and then interpolate again ( using for loop)

tecplot macro

#!MC 1410
$!Varset |NumLoop|=360
$!Loop |NumLoop|
$!Varset |num|=(|Loop|*1+0)
$!RotateData
ZoneList = [4]
Angle = |num|
XVar = 1
YVar = 2
ZVar = 3
NormalX = 1
NormalY = 0
NormalZ = 0
$!LinearInterpolate
SourceZones = [1]
DestinationZone = 4
VarList = [4-9]
LinearInterPConst = 0
LinearInterpMode = DontChange
$!WriteDataSet "C:\Users\kaiming\Documents\ZJU\output_|num|.dat"
IncludeText = No
IncludeGeom = No
IncludeDataShareLinkage = Yes
ZoneList = [4]
Binary = No
UsePointFormat = Yes
Precision = 9
TecplotVersionToWrite = TecplotCurrent
$!EndLoop

output like this

average the result , reshape the data into an array, then get the circumferential average results with 2D matrix distribution -- matlab

matlab code  is as follows:

n=359;
a=[];
b=[];
c=[];
for i=1:n
filename=sprintf('output_%d.dat',i);
fileinfo = importdata(filename);
ux=fileinfo.data(:,7);
uy=fileinfo.data(:,8);
uz=fileinfo.data(:,9);
a=[a,ux];
b=[b,uy];
c=[c,uz]; end
aver_Ux=sum(a,2)/n;
aver_Uy=sum(b,2)/n;
aver_Uz=sum(c,2)/n;
aver_Ux=aver_Ux.' % transpose
aver_Uy=aver_Uy.'  % transpose
aver_Uz=aver_Uz.'  % transpose
aver_Ux_array=reshape(aver_Ux, 499,[]);
aver_Uy_array=reshape(aver_Uy, 499,[]);
aver_Uz_array=reshape(aver_Uz, 499, []);
save -ascii aver_ux_array.dat aver_Ux_array;
save -ascii aver_uy_array.dat aver_Uy_array;
save -ascii aver_uz_array.dat aver_Uz_array;

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