convergencing problem
 

hi to every body,
i am trying to simulate a vortex tube,using rhoSimple foam to have a steadystate solution.
i used blockmesh to create the axysimmetry grid .i used first order upwind schemes for div terms and all of problem setting attached here.
i start run this case and after around 4000 iteration the tempreture and velocity contures seems good compare of experiment result but the pressure conture changes completely from each 100 iterations that means pressure not converged!
i chanded the mesh,the order of schemes and the relaxation factor of p untill0.03!but nothing changed!what should i do?what is your idea?