FLUENT-Vortex Pairing Process
 

I am a FLUENT user of version 5. I am trying to solve the vortex pairing phenomena in the developing mixing layer formed by the merging of two free streams initially separated by splitter plate. I used the unsteady LES model in FLUENT to get vortex roll-up and pairing process, but I could'nt get any expected solutions. Anyone can tell me that FLUENT can solve this kind of problem, and if so, please tell me how.