[vahidbarati447]

Hi everyone,
I am meshing a 3D model according to the figure below in the ansys meshing program for fluent. I have used two completely identical pieces with the settings of number of division for each line and face meshing for each face and the same hex dominant method. In the upper part, I got a mesh without any defects, but in the lower part, although the mesh is organized on the part, there are defects inside the part, which are clear in the figure. I am a newbie and I appreciate your help to solve my problem. Also, when I use the multizone method, it gives me an error.
https://imgurl.ir/uploads/i77699_mesh2.png
https://imgurl.ir/uploads/d77296_mesh4.png