function calcAlphaIntercell(alpha1::T, alpha2::T) where {T}
    2 / ((1 / alpha1) + (1 / alpha2))
end

function calcAlphaIntercell(alpha1::Vector{T}, alpha2::Vector{T}) where {T}
    2 ./ ((1 ./ alpha1) .+ (1 ./ alpha2))
end

function calcAlphaIntercell(alpha1::Matrix{T}, alpha2::Matrix{T}) where {T}
    2 ./ ((1 ./ alpha1) .+ (1 ./ alpha2))
end