[Yassin]

Dear colleagues;
I am trying to simulation one paper which related to pipe into pipe flow.In fact i am facing one problem which i am not able to get same mesh as it is mention in the paper.
In the paper(image titled as paper mesh), it is mention the the mesh is done in Ansys with total number of element is 25773580 with a maximum skewness value of 0.8358
whereas in my mesh (image titled as my mesh) i am getting total number of element is 2983570 with a maximum skewness value of 0.8993.
and also it is noticed that mesh is not uniform as in paper mesh
so,can anyone help me how to get this type of mesh (i mean what method or option in ansys)?
Regards;