  We present the first nonlinear, gyrokinetic, radially global simulation of a
discharge of the Wendelstein 7-X-like stellarator (W7-X), including kinetic
electrons, an equilibrium radial electric field, as well as electromagnetic and
collisional effects. By comparison against flux-tube and full-flux-surface
simulations, we assess the impact of the equilibrium ExB-flow and flow shear on
the stabilisation of turbulence. In contrast to the existing literature, we
further provide substantial evidence for the turbulent electron heat flux being
driven by trapped-electron-mode (TEM) and electron-temperature-gradient (ETG)
turbulence in the core of the plasma. The former manifests as a hybrid together
with ion-temperature-gradient (ITG) turbulence and is primarily driven by the
finite electron temperature gradient, which has largely been neglected in
nonlinear stellarator simulations presented in the existing literature.
