anchor.diff:      allocate(flowRho1(grid%nP))
       allocate(advRho(grid%nC))
       allocate(advRhou(DIMS,grid%nC))
  +    allocate(flowRhoH(grid%nP))
       allocate(advRhoH(grid%nC))
       ! load initial condition
       do i=1,grid%nE
  
positive.code:     use modNumerics
      use modAdvection
      use modDiffusion
      use modRhieChow
      type(C_PTR),value::oldVector !< old N_Vector
      type(C_PTR),value::newVector !< new N_Vector
      type(C_PTR),value::dat !< optional user data object
  
negative.code:       temp(i)=(rhoE(i)/rho(i)-0.5d0*dot_product(u(:,i),u(:,i)))/(1d0/(gamm-1d0))/Rgas
      end forall
      call setBC()
      call findVarFlow(grid,(rhoE+p)/rho,flowRho,flowRhoH)
      call findAdv(grid,flowRhoH,advRhoH)
      call findDiff(grid,temp,cond,condQ)
      forall(i=1:grid%nC)
        y(i)=rhoE0(i)+dt/grid%v(i)*(advRhoH(i)+condQ(i)) ! TODO add viscous heating
  