CFD Online Discussion Forums - Additional Variable Source Term in CFX

Hi there, I've been trying to do the additional variable source term idea given at http://www.eureka.im/4110.html to deal with problems with recursive CEL in CFX. I tried the other methods suggested but they don't work for me.

So, I'm using this CCL expression:

Code:

FLOW: Flow Analysis 1

  DOMAIN: Fluid Domain

    &replace SUBDOMAIN: P Subdomain

      Coord Frame = Coord 0

      Location = B34

      MESH MOTION: 

        Option = Unspecified

      END

      SOURCES: 

        EQUATION SOURCE: wnow

          Option = Source

          Source = (w-wnow)* 1000 [kg m^-3 s^-1]

        END

      END

    END

  END

END

This gives no CCL interpretation warning but a general warning that wnow is not available as an option in the Sources tab. Isee that it really is the case as there is only "continuity" option there.
The exact error is:

The object "/FLOW:Flow Analysis 1/DOMAIN:Fluid Domain/SUBDOMAIN:P Subdomain/SOURCES" contains the following object: "wnow" whose name is not in the set of those allowed: "continuity".

Note that I've defined the additional variable "wnow" as =w so that I get a 'copy' of w value from previous iteration to be used in present.

Please Help. Thanks! :o