In this paper, an efficient and reliable PARTICLE Swarm based approach to Optimal Design of three-PHASE Induction Motor (ODIM) is proposed. The proposed approach employs a PARTICLE-swarm-optimization (PSO) technique to search for optimal values induction motor design parameters. The proposed approach has been examined and tested on two sample motors with different objectives that reflect the motor's efficiency, active material cost, and performance under starting and full load conditions. The proposed approach results have been compared to those reported in the literature. The results are promising and show the effectiveness and robustness of the proposed approach.

The present study is to carry out a numerical sloshing using smoothed PARTICLE hydrodynamics (SPH) in the prismatic tank. Sloshing is a violent flow caused by the resonance of fluid in the tank by external oscillation. The prismatic tank was used to resemble a membrane LNG type carrier. The sloshing experiment was carried out using three pressure sensors, a camera high resolution, and four degrees of freedom forced oscillation machine. In this study, a filling ratio of 25% was used to reproduce sloshing in a low filling ratio. Only roll motion is used in the numerical simulation. Roll motion is directly imposing from the experiment displacement, and a comparison of hydrostatic and dynamic pressure was made to validate the SPH result. The time duration of the sloshing is the same as the experiment. Single-PHASE and multiPHASE SPH are conducted to reproduce sloshing in the prismatic tank. Sloshing was done both for the 2D and 3D domain. It shows that SPH has a good agreement with analytical and experimental results. The dynamic pressure is similar to an experiment through a spurious pressure oscillation exist. The dynamics pressure results show fairly for short time simulation and slightly decrease after that. The free surface deformation tendency is similar to experiment.

To investigate the movement characteristics of cubic PARTICLEs in a pump, a deep-sea mining lift model pump with a specific speed of 94 is used as the research object in this study. The discrete element method is coupled with the computational fluid dynamics method to simulate the solid–liquid two-PHASE flow of cubic PARTICLEs with different densities in the pump while the effect of PARTICLE shape on the solid–liquid two-PHASE flow in the pump is considered. Results show that the cubic PARTICLE movement rules for the same flow component are the same. The cubic PARTICLE density imposes a more significant effect on the number of PARTICLEs in the low-velocity zone than in other zones. The number of PARTICLEs in the low-velocity zone increases with the increase of density. The cubic PARTICLE velocity gradient in the impeller decreases as the PARTICLE density increases, and the PARTICLEs exhibit unsatisfactory following performance in the fluid. As the density increases, the collision exhibited by the cubic PARTICLEs is primarily PARTICLE-to-PARTICLE collisions, (i. e., more than 37%), and the collision rate between the cubic PARTICLEs and first-stage guide vane decreases significantly. Compared with cubic PARTICLEs, spherical PARTICLEs are likely to obstruct the flow channel in the guide vane. The collision exhibited by the spherical PARTICLEs in the pump is primarily PARTICLE-to-guide vane collision, and the collision rate between the spherical PARTICLEs decreases by 15. 92%.