[discussion] advection diffusion operator about lfatoolkit.jl HOT 2 CLOSED

    inputs = [
        OperatorField(basis, [EvaluationMode.interpolation], "adv"), 
        OperatorField(basis, [EvaluationMode.gradient], "gradent of deformation"),
        OperatorField(basis, [EvaluationMode.quadratureweights], "quadrature weights"),
    ]

    inputs = [
       OperatorField(basis, [EvaluationMode.interpolation, EvaluationMode.gradient], "adv and gradent of deformation"),
       OperatorField(basis, [EvaluationMode.quadratureweights], "quadrature weights"),
   ]

    function advdiffusionweakform(udu::Array{Float64}, w::Array{Float64})
        u = udu[1]
        du = udu[2:end]
        dv = parameters.wind * u * w[1] + du * w[1]
        return [dv]
    end