interpolation of a decline wall scatter data

I obtain Fluent data of a flow abouve corregated wall. i brack down the data to segmants of up and down heal part to prosses more easely the data in each sugment but i have a problem i cent solve in any way. on the wall i get kind of waves that are not part of the phisics of my problem and i found out it beacuse the interpulation on a wall with an angle have error that increas with the angle. i try few ways so resolved it, by chainging to polar cordinat, to tern the data and interpulat on a flat wall and so on but nothing solve this problem.

i dont add any code beacuse i dont have one that work(i didnt have a problem to preduse one it just didnt solved my problem) and i looking for imagenative idea of how to solve the problem.

i add one set of data of locations xn and yn and temperature data Tn

i kind solve the problem by create matrixs of the row data without interpulation but i think for farder prosesing i will be benefit from more defined data.

thanks

[Mathieu NOE]

I don't understand your problem

when I plot your data it seems clean to me

can you explain in more details , maybe with a picture of what you want ?

% simple (fast) scatter plots
figure(1)
scatter3(xn,yn,un,'filled')

figure(2)
scatter3(xn,yn,vn,'filled')

% convert scatter plot to surf (can take some time !)
[xq,yq] = meshgrid(xn,yn);
uq = griddata(xn,yn,un,xq,yq);
figure(3)
surf(xq,yq,uq)
shading interp
colorbar('vert')

vq = griddata(xn,yn,vn,xq,yq);
figure(4)
surf(xq,yq,vq)
shading interp
colorbar('vert')