[girishg]

I want to define new variable {(velocity:Ycomponent)/(free_stream_velocity)}. But in system defined field functions I am not able to find function called velocity:Ycomponent. It is only showing velocity which is a vector quantity. How can I make all components of velocity visible in field functions tab? Please help me.

I searched on help menu and got this: System field functions are predefined field functions that are created by the models activated in the continua, and share a particular set of properties.

How can I activate velocity components and magnitude?