Furthermore, in conventional centrifuge modeling all lengths are scaled by the same factor L ∗ ∗ . To produce the same stress in the model as in the prototype, we thus require ρ ρ ∗ ∗ g ∗ ∗ H ∗ ∗ = ( 1 ) g ∗ ∗ L ∗ ∗ = 1 , which may be rewritten as