I trying to model the experiment developed by HIshida 1987. (Hishida, K., Maeda, M., 1987. Turbulent characteristics of gas–solids two-phase confined jet: effect of particle density. Jpn. J. Multiphase Flow 1, 56–69.) The problem is the Re number is near to 3E4, then the model is computationally expensive.  Here my questions: 

1. Is it possible to developed an axisymmetric model in Nektar++ ? I found this file 

http://prism.ac.uk/wp-content/uploads/2014/07/gabriele2014.pdf, on this said that G. Rocco is working or worked on it. May I implement the model based on his work ?

2. For this 3D model, the mesh requirements  are about 3E10, If I use a LES model with  SVVCutoffRatio=0.5N   and SVVDiffCoeff=0.5, how can I evaluate the new mesh requirements