"coarsen" function in fluent

[tommaso_spezia]

Hello everyone! !

My name is tommaso, I write from genova and I am new to the forum! :

I am a student in mechanical engineering at the last year, we have recently followed a course of cfd in which it was also presented fluent,
To tell the truth of exercises we have not made many so I have a lot of doubts

the first, as from title, concerns the function "coarsen"

from adapt-->yplus/ystar select the surfaces on which I want the cells to be merged, I make "mark" then "manage" finally "adapt" do ok and nothing changes: in the screen is written

cry size: original:x; adapted:x; change:0.

What am I wrong?
I would like to point out that the "refine" command works very well.

thank you all, hello!!

Tommaso

 

[tommaso_spezia]

I fear I have discovered why:

you can not join cells if these have not been previously "cooled"
This, I read, it's a big problem for fluent.

I attach the discussion, (to say all a little old) maybe sooner or later it will serve someone: wally+ discussion and cell unionIn short, it seems that the coarsen function to rise with the value of wally+ over 30 simply cannot be used.... percui touch remake the mesh. :frown: