[soriyoshi]

I am wondering...Can I assign ID for boundary conditions after FLUENT assigned them automatically?..This is important because I have so many UDFs contains IDs. I don't want my UDFs seem a mess...

[Kokemoor]

As far as I know, there isn't, but I'd be eager to know if there is. What I do is have a scheme macro to get the ID of a zone by name, then pull that into the UDF.

Scheme:
(if (not (rp-var-object 'zone-id)) (rp-var-define 'zone-id 0 'integer #f))
(rpsetvar 'zone-id (zone-name->id "zone"))

UDF:
if (RP_Variable_Exists_P("zone-id")) {zone_id = RP_Get_Integer("zone-id");}

The first line of scheme initializes the "zone-id" scheme variable, the second one writes the ID of the zone "zone" to that variable. The UDF line writes the value of the "zone-id" scheme variable to the "zone_id" variable in the UDF. Then you've got the ID of "zone" available for your UDF. You could do this for any number of zones.

[sbaffini]

You can, but it actually consists in editing case files manually while exposing your cases to error prone modifications. There is no reason to do that on the case files instead of the UDFs.

[soriyoshi]

That's very helpful~~It's very kind of you~~
Actually I found it possible to define the ID number by adding boundary conditions in ICEM(I always define boundary conditions in fluent). But that is too slow compared to the scheme you've provided, since I have to define them every time I build a mesh...

Thank you again~

[soriyoshi]

Originally Posted by sbaffini

You can, but it actually consists in editing case files manually while exposing your cases to error prone modifications. There is no reason to do that on the case files instead of the UDFs.

Yes, I totally agree...
By the way, can you explain a little more about how to do that by editing case files?