# Experimental Observations of Heat-Assisted Boycott Effect in Trapezoidal Enclosures
## 4 Discussion
This presents an opportunity to study the effects of physical filtration and/or particle resuspension inhibition on process improvement. \begin{table}
\begin{tabular}{l l l l} \hline
**Authors** & **Experimental Setup** & **Concentrations** & **Inclination Angle 1** \\ \hline \multirow{4}{*}{[PERSON] [43]} & Fine emery powder for an optical shop of & - & 0, 20, 30, 40, 60 \\  & nominal size No. 1200 in water & - & 0, 20, 30, 40, 60 \\ \cline{2-4}  & Rabbit’s blood was dissolved either in & & \\  & physiological saline or in & \(<\)30\% & 0, 25, 40, 50 \\  & [PERSON]’s solution & & \\ \hline \multirow{4}{*}{[PERSON] et al. [8] 2} & Two sizes of glass spheres were used: & & \\  & size 1 (132 \(\pm\) 0.5 \(\upmu\)m) and size 2 & & \\  & (103.2 \(\pm\) 0.4 \(\upmu\)m). The working fluid & & \\  & consisted of 79.30\% hydrogenated & & \\  & terphenyls (Monsanto HB-40®) and & & \\  & 20.70\% heavy mineral oil (Fisher O-120), & & \\  & with a viscosity of 36.5 centipoise & & \\  & (0.0365 Pa-s). & & \\ \hline \multirow{4}{*}{[PERSON] et al. [44]} & Fine silica particles of density 2.65 kgm\({}^{-3}\) & & \\  & settling in stratified salt water. & & \\  & The particle radius was estimated to be & & \\  & \(4.1\pm\) 0.8 \(\upmu\)m. & & \\ \cline{2-4}  & MO-SCI GL-0191 glass spheres of radius & & \\  & \(17.5\pm\) 1.5 \(\upmu\)m settling in a salt-stratified & & \\  & solution comprising 63\% glycerol and & & \\  & 37\% water. & & \\ \hline \multirow{4}{*}{[PERSON] and [PERSON] (present study)} & Glass spheres with diameters of 8 to & & \\  & 12 \(\upmu\)m and a density of 2.5 g/cm\({}^{3}\) were & & \\ \cline{1-1}  & used. Additionally, experiments included & & \\ \cline{1-1}  & different cases with heat injections. & & \\ \hline \end{tabular}  
* Inclination angle relative to the vertical, 2 The geometry used was a cone.  
\end{table} 
Table 4: Experimental configurations and parameters for studies using trapezoidal geometry. An improvement in clear water production is discernible for the initial concentration of 3000 ppm, particularly in instances where an initial power of 9 W is used, producing an average concentration that is lower than that observed in the absence of heat injection. This can be seen by comparing the average sedimentation rate 8.52 %/min \(>\) 5.96 %/min and the average clear water generation rate 3.48 %/min \(>\) 0.95 %/min. The application of a 4.5 W power did not result in a significant increase in the mean concentration. In both cases with heat injection, both horizontal stratification and vertical stratification were observed. Upon examination of the concentration field in columns (Figures 15 and 17), it becomes evident that the phenomenon is most pronounced in column \(A_{1}\). The formation of horizontal stratification is evident in columns \(A_{2}\) and \(A_{3}\), where the impact of the resuspension is discernible. This phenomenon occurs in cases with initial concentrations of 1500 and 3000 ppm. For both initial concentrations, there is a notable discrepancy in the horizontal interface formation rate for the case of 9 W, which can be observed at the time point of 10 min. Upon analysis by rows, it can be observed that vertical stratification is present, albeit with a smaller gradient than that formed horizontally. This is evident in Figures 16 and 18, particularly in row \(F_{2}\), and is observed once more at the 10 min mark. With regard to the wall temperature, Figure 19 reveals that the initial concentration of particles has no significant effect on the wall temperature. The results indicate that for an initial concentration of 3000 ppm, the generation of clear water with a concentration lower than 600 ppm (20% of the initial concentration) is enhanced when the process is subjected to an initial power of approximately 9 W imposed on the Peltier element. This finding has potential applications in the design of primary sedimentation equipment in water treatment processes.