subroutine UpdateGRK3_DGModel1D_t(this,m)
implicit none
class(DGModel1D_t),intent(inout) :: this
integer,intent(in) :: m
! Local
integer :: i,iEl,iVar
do concurrent(i=1:this%solution%N+1, &
iel=1:this%mesh%nElem,ivar=1:this%solution%nVar)
this%workSol%interior(i,iEl,iVar) = rk3_a(m)* &
this%workSol%interior(i,iEl,iVar)+ &
this%dSdt%interior(i,iEl,iVar)
this%solution%interior(i,iEl,iVar) = &
this%solution%interior(i,iEl,iVar)+ &
rk3_g(m)*this%dt*this%workSol%interior(i,iEl,iVar)
enddo
endsubroutine UpdateGRK3_DGModel1D_t