## 4 Experimental Verification
### Mixing Uniformity of the Slurry
A peak appears at 45 r/min, which may be due to the maximum values of elongation rate and shear rate at this speed (see simulation analysis in reference [37]). As the speed increases, the residence time of the material in the mixer decreases, which may be the main reason for the decrease in mixing uniformity. Of course, the variation in speed also brings about changes in pressure inside the mixing chamber, rotational torque, power, tensile stress, shear stress, and leakage. In the later stages, a combination of theoretical analysis and application of the experimental device is needed to analyze the effects of mixing under different parameter conditions by studying the mixing mechanism of high-viscosity fluid inside the intermeshing screw. \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Rotate** & & & & & & & **Standard** & **Average** \\
**Speed/** & & & & & & & **Deviation** & **Value/g\(\cdot\)cm\({}^{-3}\)** \\ \hline \multirow{6}{*}{15} & Group No. & 1 & 2 & 3 & 4 & 5 & & \\  & Density & 1.196 & 1.193 & 1.201 & 1.205 & 1.186 & & \\  & Fluctuation compared to average & 0.002 & 0.005 & 0.003 & 0.007 & 0.012 & & \\  & Group No. & 6 & 7 & 8 & 9 & 10 & 0.0082 & 1.197 \\  & Density & 1.203 & 1.211 & 1.196 & 1.191 & 1.183 & & \\  & Fluctuation compared to average & 0.005 & 0.013 & 0.002 & 0.007 & 0.015 & & \\ \hline \multirow{6}{*}{25} & Group No. & 1 & 2 & 3 & 4 & 5 & & \\  & Density & 1.195 & 1.199 & 1.198 & 1.215 & 1.191 & & \\  & Fluctuation compared to average & 0.011 & 0.007 & 0.008 & 0.009 & 0.015 & & \\  & Group No. & 6 & 7 & 8 & 9 & 10 & 0.0104 & 1.199 \\  & Density & 1.201 & 1.219 & 1.217 & 1.220 & 1.212 & & \\  & Fluctuation compared to average & 0.005 & 0.013 & 0.011 & 0.013 & 0.006 & & \\ \hline \multirow{6}{*}{35} & Group No. & 1 & 2 & 3 & 4 & 5 & & \\  & Density & 1.192 & 1.193 & 1.195 & 1.221 & 1.218 & & \\  & Fluctuation compared to average & 0.013 & 0.012 & 0.010 & 0.017 & 0.013 & & \\ \cline{1-1}  & Group No. & 6 & 7 & 8 & 9 & 10 & 0.0116 & 1.206 \\ \cline{1-1}  & Density & 1.195 & 1.205 & 1.208 & 1.216 & 1.187 & & \\ \cline{1-1}  & Fluctuation compared to average & 0.010 & 0.000 & 0.003 & 0.011 & 0.018 & & \\ \hline \multirow{6}{*}{45} & Group No. & 1 & 2 & 3 & 4 & 5 & & \\  & Density & 1.210 & 1.179 & 1.181 & 1.183 & 1.187 & & \\ \cline{1-1}  & Fluctuation compared to average & 0.022 & 0.009 & 0.007 & 0.005 & 0.001 & & \\ \cline{1-1}  & Group No. & 6 & 7 & 8 & 9 & 10 & 0.0093 & 1.207 \\ \cline{1-1}  & Density & 1.186 & 1.197 & 1.192 & 1.178 & 1.184 & & \\ \cline{1-1}  & Fluctuation compared to average & 0.002 & 0.009 & 0.003 & 0.010 & 0.004 & & \\ \hline \multirow{6}{*}{55} & Group No. & 1 & 2 & 3 & 4 & 5 & & \\  & Density & 1.200 & 1.209 & 1.229 & 1.177 & 1.222 & & \\ \cline{1-1}  & Fluctuation compared to average & 0.010 & 0.001 & 0.020 & 0.033 & 0.012 & & \\ \cline{1-1}  & Group No. & 6 & 7 & 8 & 9 & 10 & 0.0130 & 1.202 \\ \cline{1-1}  & Density & 1.233 & 1.181 & 1.218 & 1.217 & 1.196 & & \\ \cline{1-1}  & Fluctuation compared to average & 0.023 & 0.028 & 0.008 & 0.008 & 0.013 & & \\ \hline \end{tabular}
\end{table} 
Table 6: Mixture density test results.