@article{bibcite_7947, author = {E. Westerhof and J. Pratt}, title = {Closure of the single fluid magnetohydrodynamic equations in presence of electron cyclotron current drive}, abstract = {In the presence of electron cyclotron current drive (ECCD), the Ohm{\textquoteright}s law of single fluid magnetohydrodynamics is modified as E + v {\texttimes} B = η(J {\textendash} J EC). This paper presents a new closure relation for the EC driven current density appearing in this modified Ohm{\textquoteright}s law. The new relation faithfully represents the nonlocal character of the EC driven current and its main origin in the Fisch-Boozer effect. The closure relation is validated on both an analytical solution of an approximated Fokker-Planck equation as well as on full bounce-averaged, quasi-linear Fokker-Planck code simulations of ECCD inside rotating magnetic islands. The new model contains the model put forward by Giruzzi et al. [Nucl. Fusion 39, 107 (1999)] in one of its limits. }, year = {2014}, journal = {Physics of Plasmas}, volume = {21}, number = {10}, pages = {102516}, doi = {10.1063/1.4900871}, language = {eng}, }