Table 3. Results and Errors of the Herschel–Bulkley Approximation for Emulsions X2 and X4 at Certain Temperatures.
sample | X2 (25 vol % H2O) | X4 (40 vol % H2O) | ||||
---|---|---|---|---|---|---|
temperature, °C | 10 | 30 | 50 | 10 | 30 | 50 |
σY, Pa | 4.94 | 1.49 | 1.25 | 0.61 | 0.39 | 0.18 |
K | 8.06 | 2.87 | 1.85 | 0.21 | 0.10 | 0.06 |
n | 0.53 | 0.61 | 0.64 | 0.95 | 0.92 | 0.88 |
reduced χ2a | 0.138 | 0.622 | 0.417 | 0.049 | 0.088 | 0.002 |
R2 (COD)b | 0.998 | 0.991 | 0.991 | 0.999 | 0.999 | 0.999 |
The reduced χ2 value is equal to the residual sum of square divided by the degree of freedom. A reduced χ2 value close to 1 indicates a good fit result.
The coefficient of determination (COD) is a statistical measure to qualify the regression.