Modeling approach to a 3D simulation of transport in TEXTOR-DED laminar zone with a finite element method

A modeling approach to 3D transport simulations for an edge ergodized plasma with a finite element method coupled with a finite difference method is discussed. The idea of the modeling is based on a laminar zone, where one can approximate the transport with scrape-off layer model. The topics to be discussed are an optimization of 3D grids, a problem with CPU time (slow down of the code), and accuracy of the code as checked with a particle balance.