[F C]

I have been assigned the Sajben Transonic Diffuser, in which I am attempting to solve in Ansys CFX as a 2D case in Ansys 14.5, so far I have been unable to capture the shock wave which occurs in the nozzle.

Below is the link to the studies which can be found at the bottom of the page
http://www.grc.nasa.gov/WWW/wind/val.../transdif.html

With my set up I am running Similar conditions to the the studies

Inlet Velocity: 300m/s (~0.9 Mach)
Inlet Temperature: 500R (277.78K)
Inlet Pressure: 19.58 psia (134.999 kPa)
Outlet Pressure: 14.1 psia ( 97.21 kPa) This pressure is reported to create a strong shock wave

Turbulence Model: SST
Heat Transfer: Total Energy

I am currently using a structured mesh which is approximately the same density that is used by the studies, however I think this may not be dense enough to capture the shock wave.

I am now using a Transient Simulation which is working much better and getting me close but in regards to the convergence of the simulations, they get very close to the simulation criteria, 1E-05 in my case however heat transfer generally just floats right above this value which stops it fully converging.

I am currently thinking that it may be due to my mesh being too coarse, and I am now attempting a finer mesh but it may be a while before I obtain results!

Any help is appreciated

Many Thanks

Farzad