  Direct numerical simulations are performed to study turbulent
Rayleigh-B\'{e}nard convection in a vertical cylindrical cavity with uniform
axial magnetic field. Flows at high Hartmann and Rayleigh numbers are
considered. The calculations reveal that, similarly to the behavior observed in
Rayleigh-B\'{e}nard convection with strong rotation, flows at strong magnetic
field develop a central vortex, while the heat transfer is suppressed.
