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25 A simulation was performed using ANSYS to understand the effects of temperature and flow rate on cavitation as prescribed by Rahmeh et al [29]. Here the designed venturi tube was subjected to a multiphase fluid flow with varying flow rates and inlet temperatures. In this study data relating to change of velocity and vapor volume fraction in the venturi tube were simulated. Identifying the vapor volume fraction helps in understanding the number of microbubbles generated for when the vapor volume concentration increases it indicates that more microbubbles are generated due to cavitation as liquid pressure drops to vapor pressure. In this simulation data relating to two flow rates and three temperatures at a constant gauge pressure of 190 kPa (27 psi) were gathered. The two flowrates were intended to create velocities of 2 m/s and 4 m/s at the inlet of the venturi tube at temperatures of 298K, 323K and 350K. It was found that increments in temperature seem to increase the vapor volume of the cavitated fluid (Figure 8a and Figure 8b). Increase in vapor volume also seem to depend on increments in flow rate (Figure 8c, Figure 8d and Figure 8e, Figure 8b). Yet large increments in temperatures seem to decrease throat velocity of the fluid (Figure 8f). Overall, findings through this study suggests that to optimize cavitation in a fluid it is ideal to increase both the flowrate and the temperature.PDF Image | Hydrodynamic cavitation exfoliation layered graphene nano
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