30.1.26 Cross

Function

$y=A_{2}+\frac{A_{1}-A_{2}}{1+(tx)^{m}}$

Brief Description

Cross model to describe pseudoplastic flow with asymptotic viscosities at zero and infinite shear rates.

Parameters

Number: 4

Names: A1, A2, t, m

Meanings: A1 = zero shear viscosity, A2 = infinite shear viscosity, t = time constant, m = power index

Lower Bounds: A1 > 0, A2 > 0, t > 0, m >= 0

Upper Bounds: none

Script Access

nlf_Cross(x,A1,A2,t,m)

Function File

fitfunc\Cross.fdf

Rheology