I need help in ansys cfx mesh
 

Hi everyone

My name is Agnelo

I'm new to the CFD world. I'm need help from you. I'm having trouble to fix the wall distance in meshing CFX, what i mean is: i need to create a mesh with tetra elements in tube with trapezoidal cross section to measure the pressure drop later, but the mesh in Ansys CFX is automatic, it generates a mesh for al the body but i just want a the inner part of the model to have this tetra elements and the outter part is for the wall distance to calculate the y plus, for several runs.

I dont if you can help me, but i need this for a school project. please help me.
I uploaded as well a picture of the desired mesh so you can understand what i mean.

Thanks

Agnelo