s) has the expression corresponding to Maxwell mechanical model, specifically for plastics, G is the transversal elasticity modulus, K is the compressibility modulus, v is the transversal Poisson

contraction coefficient and [eta] is the constant corresponding to Newtonian component of the Maxwell model.

c] = contraction coefficient, the ratio of the jet area at the vena contract a downstream of the bore to the area of the bore itself (dimensionless)

c] = change in contraction coefficient due to plate deflection (dimensionless)

Their published formula is different in two respects, however: (1) their approximation for the deflection angle of the bent plate assumes elastic, not plastic, plate deformation, and (2) a different correlation is used for the contraction coefficient, [C.

and [phi]' for the deflected plate is determined using the [beta] ratio before deflection, but the contraction coefficient [C.

Finally, the contraction coefficient correlation, taken from von Mises (1917), is given by Equation 7, with values of Mi interpolated from Table 2.