Hi All,
I am simulating a 3D case and my case was working fine in 2D, after run it in 3D it keeps crashing.
I have a serious problem in the outlet BC and I tried to use higher order BC and still crashing 

My case outlet BC is 
--------------------------------------------
       <REGION REF="5">     <!-- Outlet  -->
        <N VAR="u" USERDEFINEDTYPE="HOutflow" VALUE="0" />
        <N VAR="v" USERDEFINEDTYPE="HOutflow" VALUE="0" />
<N VAR="w" USERDEFINEDTYPE="HOutflow" VALUE="0" />
        <D VAR="p" USERDEFINEDTYPE="HOutflow" VALUE="0" />  
      </REGION>
-----------------------------------------------

any suggestions?
Also if i can creat a buffer zone how i can do it with different viscosity, or can i specify "SpectralVanishingViscosity" to a specific zone not for all the domain.

Regards,
Cheers,
Reda PhD student 
Aerospace Dep
UPC Spain