MATLAB R2023a has not problem reading it, however there does not appear to be much to see in the plot —
Uz = unzip('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1370564/NACA4512_1E-4_225x66.XYZ_M=0.5_ALPHA_2.0_TURBULENT.dat.zip');
a = readmatrix(Uz{1})
% clear;
% clc;
nx=225;
ny=66;
nfields=9;
% a=readmatrix('NACA4612_1E-4_225x66.XYZ_M=0.5_ALPHA_2.0_Turbulent.dat','Headerlines',5)';
b=reshape(a(1:nx*ny*2),[nx,ny,2]);
x=b(:,:,1);
y=b(:,:,2);
%centroids (improve this by averaging the 4 corners)
xc=x(1:end-1,1:end-1)+diff(x(:,1:end-1))/2 +diff(x(1:end-1,:),[],2)/2;
yc=y(1:end-1,1:end-1)+diff(y(:,1:end-1))/2 +diff(y(1:end-1,:),[],2)/2;
b=reshape(a(nx*ny*2+1:end),[nx-1,ny-1,nfields]);%nine dependent variables
bSz = size(b)
%plot pressure
figure
surf(xc,yc,b(:,:,4))
view(2)
shading flat
axis image
axis([-1,1,-1,1])
.
