Validation of BOUT++ Nonlinear ELM Simulations Using Fast Measurements from \hbox{DIII-D}

Nonlinear edge localized mode (ELM) simulations have now been carried out with BOUT++ [1] at low experimental collisionality using a hyper-resistivity model to allow reconnection and ELM crash without formation of unphysically thin current sheets. Multiple fast diagnostic measurements of ELM dynamics are available from DIII-D [2,3] to validate these BOUT++ simulations. Using kinetic plasma and $E_r$ profiles averaged over the last 20\% of multiple ELM cycles, BOUT++ linear and nonlinear simulations of a large Type-I ELM in DIII-D were performed. Multiple synthetic diagnostics applied to the BOUT++ output (e.g.\ ELM energy loss, pedestal pressure drop, target heat flux, ECE imaging etc.) will be compared with fast magnetics, Thomson scattering, IRTV, ECE-I and other measurements of the ELM dynamics.\par \vskip6pt \noindent [1] X.\ Xu {\em et al.}, Nucl.\ Fusion {\bf 51}, 103040 (2011).\par \noindent [2] M.E.\ Fenstermacher {\em et al.}, J.\ Nucl.\ Mater.\ (2012) in press.\par \noindent [3] M.E.\ Fenstermacher {\em et al.}, Plasma Phys.\ Controlled Fusion {\bf 45}, 1597 (2003).