For CFX 5.5, i want to make some blades to rotate inside a blender, but i dun know how to do.can any one help me? thanks

It's a bit too complicated to fully describe in an on-line forum, but the basic process is to create 2 grids; 1 for the blades and one for the tank. These 2 grids are imported into Build and a MFR (Multiple Frame of Reference) analysis is set up in the domains form. I think this was available in 5.5? Refer to MFR in the help menu for more details.

For that matter 5.5 is about 3 years out of date (5.7 is the current release) and I'm surprissed that your Build license still works. I would suggest contacing tech support but I'm pretty sure 5.5 is no longer supported.

thanks for you help first

but can you tell me how to import two grids at the same time?

It's been a couple of years, but if I remember right and you're creating the grids in Build then you need to start each database as "meshing only" mode (in the initialization panel) to create the 2 grids. Once they are done you create a 3rd database (I can't remember what mode options are available, but if there's something that refers to no meshing, or import grids then that's what you want) and import the 2 grids.

Hope that this helps.