Thermo Scientific HAAKE RotoVisco 1 Instruction Manual page 118

Sensor Systems
Calculation Equations
Shear Stress 
The shear stress  is proportional to the torque 'Md' and to
the stress factor 'A'.
 = A  Md
The factor 'A' is calculated as described in the following
equation. It has the unit of an inverse volume:
2
A =
3
π ⋅ R
.
Shear Rate
γ
.
The shear rate is proportionally linked to the angular veloc-
γ
ity or speed and the shear factor M.
.
= M ⋅ Ω
γ
The angular velocity  is calculated according to 2π
from the speed n.
The factor 'M' is calculated as follows:
M = R
h
Deformation :
The deformation  is linearly linked to the angular deflection
and the shear factor M.
 = M   with  = Torsion Angle rad
The following conversion equation should be applied:
1 rad = 57.296 deg.
116
with R = Plate Radius
with R = Plate Radius
h = set distance
or 1 deg. = 0.0174 rad
⋅ n
60