  3D2V continuum gyrokinetic simulations of electrostatic plasma turbulence in
a straight, open-field-line geometry have been performed using the full-$f$
discontinuous-Galerkin code Gkeyll. These simulations include the basic
elements of a fusion-device scrape-off layer: localized sources to model plasma
outflow from the core, cross-field turbulent transport, parallel flow along
magnetic field lines, and parallel losses at the limiter or divertor with
sheath model boundary conditions. The set of sheath boundary conditions used in
the model allows currents to flow through the walls. In addition to details of
the numerical approach, results from numerical simulations of turbulence in the
Large Plasma Device (LAPD), a linear device featuring straight magnetic field
lines, are presented.
