## 4 Experimental Verification  
### Materials and Methods  
Corn syrup (shown in Figure 13), known for its favorable Newtonian properties and high viscosity, is extensively employed in the food industry. Flour is chosen to mimic the solid constituents in the manufacturing process, while the color of quartz sand facilitates easy observation of the mixing effect. Distilled water serves the purpose of adjusting the viscosity of additional corn syrup and cleaning the tester. Figure 12: Design and Implementation of the Experimental Apparatus. Figure 13: Test Material: (**a**) Test Material; (**b**) Electron densitometer; (**c**) Anton Paar MCR 102 rheometer. The hydrodynamic traits of the test material stand as crucial factors in ascertaining the mixing efficiency of the extension-dominated mixer. The rheological curve, viscosity, density, and other mechanical parameters serve as a theoretical foundation for designing the extension-dominated mixer. Employ the following instruments to measure the physical properties of the test material. Figure 13b shows an electronic densitometer: MH-300, weighing range: 0.01-300 g, applicable to both liquid and solid samples, accuracy of 0.001 g/cm\({}^{3}\), adjustable solution temperature range of 0-100 \({}^{\circ}\)C, branded as LICHEN. Utilized for determining material density. Figure 13c shows a rheometer: Anton Paar MCR 102; minimum torque in rotational mode: 0.05 N\(\cdot\)m, minimum torque in oscillatory mode: 0.01 N\(\cdot\)m, maximum torque: 200 N\(\cdot\)m, strain angle range: 0.5 nN\(\cdot\)m, angle displacement resolution: 0.01 rad, minimum rotational speed CSS: 10\({}^{-8}\) rad/s, minimum rotational speed CSR: 10\({}^{-8}\) rad/s, maximum rotational speed CSS/CSR: 314 rad/s, minimum angular frequency: 10\({}^{-7}\) rad/s, maximum angular frequency: 628 rad/s, normal force range: 0.01-50 N, branded as Anton, employed for rheological characterization of non-Newtonian fluids. The results are shown in Table 3.  
During the experiments, the temperature was maintained at 20 \(\pm\) 2 \({}^{\circ}\)C using air conditioning control. The mixing uniformity of the slurry prepared by the internal meshing screw mixing equipment was tested at various speeds to verify its effectiveness in mixing different liquid and liquid and fine powder combinations. A mixture of corn syrup and distilled water at a ratio of 6:1 was tested to show the mixing effectiveness, adding blue and red quartz sand to make the result more clearly visible (shown in Figure 14). Corn syrup and flour are mixed at a mass ratio of 2:1 to evaluate the mixing effectiveness of the internal meshing screw (shown in Figure 15). Due to feeding system limitations, a higher solid-liquid ratio will cause feeding difficulties). As a result of the gradual decrease in pitch of the stator and rotor of the internal meshing screw device, the theoretical discharge volume of each is calculated based on the pitch of the rotor at the discharge port (which is the minimum pitch except for the  
Figure 14: Display of mixing effect of liquid–liquid system: (**a**) Material status before mixing; (**b**) State of the material after mixing. \begin{table}
\begin{tabular}{c c} \hline \hline
**Material Name** & **Physical Properties and Parameters** \\ \hline \multirow{3}{*}{Corn syrup} & Corn syrup, thick transparent liquid, Deen Food Ingredients Co., \\  & LTD., density of 1340 kg\(\cdot\)m\({}^{-3}\), viscosity (28 \(\pm\) 0.19) Pa\(\cdot\)s (20 \({}^{\circ}\)C), \\  & transmitat rate of 98.2\%. \\ \cline{1-1}  & \\ \cline{1-1}  & \\ \cline{1-1}  & \\ \cline{1-1}  & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Physical properties of the test material. -sealing section). Then, the feed is provided proportionally. The formula for calculating the theoretical discharge volume is as follows:  
\[Q_{m}=8 eRh_{\text{min}}\overline{\rho}n \tag{5}\]  
\(Q_{m}\) represents the theoretical discharge volume. Material feed rates are set proportionally equal to the theoretical discharge volume.