[Mohammad74]

Hello,

I'm trying to simulate an array of 3*3 cubes using k-w sst turbulence model in Ansys Fluent. I've used gambit to generate a fully structured hexahedral mesh and with relatively fine mesh near the walls for boundary layer simulation. As for boundary conditions, I defined inlet boundary as velocity inlet with custom velocity profile and 10% turbulence intensity, outlet boundary as pressure outlet and side walls as symmetric. I posted pictures of the mesh below:

1.jpg
2.jpg
3.jpg

After the simulation, I compared the velocity magnitude along a vertical line located at the middle of the top of central cube with the data I obtained from a journal article. I posted the plot of this comparison below:

4.jpg

As can be seen by the picture, my velocity values in vicinity of the wall is underpredicted by a relatively large margin. What is the problem here? What am I missing?
I'm struggling to find the reason since my domain dimensions are larger and my cell counts are higher than that of the article I mentioned earlier.

Any helps/suggestions would be much appreciated.