hi ,i'm modeling the flow in pipe with phase changes between liquid and gas.can fluent do it

Based on the following part of Fluent documentations I think yes.

help/html/ug/node517.htm

12.1 Overview of Species and Reaction Modeling

FLUENT can model species transport with or without chemical reactions. For information about modeling species transport without chemical reactions, see Section 13.4.

Chemical reactions that can be modeled in FLUENT include the following:

Gas phase reactions that may involve NOx and other pollutant formation, etc.

Surface reactions (e.g., chemical vapor deposition) in which the reaction occurs at a solid (wall) boundary.

Particle surface reactions (e.g., coal char combustion) in which the reaction occurs at the surface of a discrete-phase particle.

Additional information on modeling of droplet/particle reactions is presented in Section 21.3.

can we do phase change for sand casting problems