[cfdudf]

Hi,

I am modelling a concentric tube in which inner tube is carrying hot fluid and outer shell contains wax. The hot fluid gives its energy and melt the pcm placed in the shell. Hot fluid and wax is separated by a wall.I modeled the geometry as follows.

Design Modeler- sketch the outer circle and extrude. Sketch the inner circle and extrude (using add frozen or slice , I have tried both one by one).

My Problem- It seems that hot fluid is not actually moving in the pipe (plz see velocity profile).I have put inlet velocity as 1 m/s. On the other the shaded green is my inlet and i put 90 C on this and wax is melting at 35.

plz help me to resolve . I tried many a times.