Figure 7: yield stress vs time (WANG et. al)
Particle size
It was seen as the particle size increasing both viscosity and
yield stress in fig. 8 and fig. 9 is decreasing because for small
particle surface area is more at same water content there will
be less flowability and relative
slip will be less and hence
more viscosity.
Figure 8: viscosity vs particle size (Wang et.al)
Figure 9: yield stress vs particle size (Wang et. al)
Concentration of plasma
In fig. 10 and fig. 11 it can be seen that as the concentration
is increasing both viscosity and yield stress is increasing his
could be because with concentration
increase distance
between particles will decrease
thus intermolecular force
will increase and hence resistance to flow will increase.
Figure 10: viscosity vs plasma concentration (Wang et.al)
Figure 11: yield stress vs plasma concentration (Wang et. al)
Shear rate
In fig. 12 and fig. 13 it is shown
that viscosity decreases
while yield stress increases with the increase in shear rate.
Figure 12: viscosity vs shear rate (Wang et.al)
Figure 13: yield stress vs shear rate (Wang et. al)
Bauxite Tailings Rheology
Variation of yield stress and viscosity is studied with-
Moisture content
It can be concluded from fig. 14 (a)
that shear stress
increases up to certain value of
shear rate and then starts
decreasing the reason could
be that tailing could have
detached from the plate when high shear rate is applied. It
can also be inferred that M.C has effect on tailings behaviour
as peak attained is not same at all M.C.
In fig. 14 (b) it is observed that
viscosity has continuous
decrease with shear rate this is indicated by shear thinning
nature of tailings. Also, as M.C
increases viscosity is
decreasing due to increase in interparticle distance.
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