Abstract: We propose a method to regulate numerical dissipation of central numerical fluxes in magnetohydrodynamics,and give a dissipation regulator for central numerical fluxes.We take Local Lax-Friedrichs flux as an example and apply the dissipation regulator in computation.A second order accurate MUSCL data reconstruction is used to extend Local LaxFriedrichs scheme to second-roder.Two test benchmark problems show that the dissipation regulator is effcient.

Key words: magnetohy drody namic s(MHDs), central fluxes, dissipationregulator