Marked points represent the average values of the rheogram
experimental data and continuous lines are the fit results calculated using the Herschel-Bulkley model.
For the Brookfield rheometer, the viscosity of the same samples has been obtained, directly from the rheogram
of the oils and independent of the velocity.
of Thixotropy obtained by plotting shear stress versus shear rate shows the down curve (obtained by decreasing shear rate) is displaced to the left of the up curve (obtained by increasing shear rate).
Summary of Wet Paper Coating (top row) and Metalcasting Refractory Coatings (first column) Tests Fta Solids 32CCD Analyzer Hercules Camera (microwave) Rheogram
Baume Brookfield viscosity (A) X Thixotropic index (B) X Zahn viscosity (sec) X % solids (oven) X Density (wt.
All the data were used to form rheogram
and are shown in Figure 2.
The minimal elastic torque time of the MDR rheogram
for each compound was collected and is hereafter designated as [t.
For a plastic material, the rheogram
does not pass through the origin, and no strain rate occurs until the shear stress exceeds some yield value.
To describe the rheology of fluid, mathematical models based on rheograms
are proposed [20, 27, 28].
It was determined by analyzing the rheograms
or product flow curves (Frascareli et al.
For formulations containing glycerin the rheograms
depicted that the formulations follow Newtonian flow pattern, since the shear rate was directly proportional to shear stress.
1991) are used most often because of their simplicity and the fair description of the fluid rheograms
Using graphs and rheograms
, he described flow behaviors such as Newtonian, pseudoplastic, dilatant, shear thinning, and shear thickening.