CFD Analysis of pump
 

hello can anyone help me in analysis of pump using CFD? I dont know how to use the effect of rotation in CFD. which mesh is better tetra or hexa? The software is ANSYS CFX.

Re: CFD Analysis of pump *NM*
 

Re: CFD Analysis of pump
 

Hi,

Hexa Mesh is best and to give rotation give the impeller

domain as rotating.

Re: CFD Analysis of pump
 

Dear Remith,

Always hexa mesh is better than the tetra mesh, please go through the tutorial file "Flow in an Axial Rotor/Stator" for defining rotation

Re: CFD Analysis of pump
 

Tetrahedron mesh is much more easy to build and for the first approaching, use this type of grid.

Re: CFD Analysis of pump
 

i agree with Rogerio,

for your initial calculations you can go ahead with tetra mesh, but finally if you are looking for accuracy go with hexa mesh

Re: CFD Analysis of pump
 

Even so for a good accuracy, if you use tetra with a good number of elements, it is not to be wondered at you will find a good result. BUT, it´s good to make a study of the independence of the grid.

Re: CFD Analysis of pump
 

if you are looking at drag or seperation then it does not make sense to run a case with tetra cell. even if you have good number of cells in your domain.