VPAD Manual
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Turbulent flow:
“non-linear” flow lines. Impossible to predict the exact movement of the fluid. Very
quick.
For rotational systems, this means that the fluid’s movement must be circumferential. When the
internal forces of a fluid end up being too great, the fluid can become a turbulent flow, in that the
particles that make it up become unpredictable, making it impossible to analyse it with standard
mathematical models.
This turbulence creates a false reading which is a lot higher than the real one, without linear growth
and totally unpredictable.
For the following geometries, these transition points have been found to be approximate to turbulent
flow:
1) Spindle L1:
15 cP to 60 rpm
2) Spindle R1:
100 cP to 50 rpm
3) Adaptor LCP:
0.85 cP to 60 rpm
Turbulent flow conditions will always exist in these conditions as long as the RPM/cP ratio exceeds the
values listed above.
