Mixer- settlers are widely used for solvent extraction process in industry. The aims of this project are simulation of FLUID flow and optimizing the operational conditions of settler in solvent extraction process. Designing and meshing of settler geometry is done by Gambit software. Then, in order to simulate the FLUID flow, the meshed designed imported to Ansys Fluent software. Simulation results were verified before simulation. Effect of Inlet volumetric on phase separation investigated. The effect of geometry of picket fences was investigated by the presence of cubic, cylindrical picket fences, picket fences with 5 corner cross section and half cylindrical picket fences. A few extra plates of picket fences were located near the entrance of settler. Phase separation in presence of two and three rows of picket fences investigated. Results indicate that by reducing the inlet volumetric rate, increasing the number of rows, putting extra plates of picket fences in front of entrance and decreasing the closed to open surface ratio to 2, separation improves.

Membrane bioreactor (MBR) is an effective technology for wastewater treatment and water reuse which is becoming increasingly popular due to its numerous applications and advantages over conventional activated sludge process. This novel technology have advantages of small footprint, high concentration of mixed liquor suspended solids (MLSS), high removal efficiency of chemical oxygen demand (COD), less production of excess sludge and to be reliable and simple to operate. Membrane fouling and its consequences, regarding plant maintenance and operating costs, has gained attention in recent years as a major obstacle for development of this technology. Various methods have been used to reduce membrane fouling and new solutions are frequently proposed and used.

Hydrodynamic coefficients for an autonomous underwater vehicle (AUV) are obtained by simulating the maneuver tests in COMPUTATIONAL FLUID dynamic (CFD) media. The simulations are performed for different length to diameter ratios by STAR-CCM+ software. Also the effects of different hydroplanes as a hull appendage is investigated. Hydrodynamic forces and moment are computed and by using suitable curve fitting linear and nonlinear hydrodynamic coefficients are calculated. The results show that by increasing the length to diameter ratio the higher hydrodynamic coefficients can be obtained. The comparison of simulated results with the available experimental data shows a very good agreement among them.

Blood is one of the vital FLUIDs of the human body. Measurement of its viscosity and other properties is very important in detecting and understanding different cardiovascular diseases. In this study, the blood flow in a concentric cylinder viscometer was simulated numerically. The blood flow patterns were analyzed by applying different rotational speed of inner cylinder. Creation of a Couette flow, end effects and suitable rotational speed limit were analyzed. The amount of the torque applied to the inner cylinder which prevents the generation of the Taylor vortices was also predicted. From the obtained results, one can conclude that these vortices were not as important as the end effects were. In order to keep the blood sample temperature within a constant and acceptable range a thermal bath was used. Heat removal rate with different inflow rates of coolant was also predicted numerically.

In this paper, one-dimensional numerical optimization of lead-acid battery with finite-volume method is performed using the governing equations of battery dynamics. For validation, the present results are compared with previous studies which show good agreement. The demand for batteries with high energy and power has increased due to their use in hybrid vehicles. The major shortcoming of lead-acid batteries in industry is low energy and high weight; therefore, a cell with higher energy and lower thickness is designed by using particle swarm optimization based on developed simulation code, which is less time consuming and much faster than experimental method. The results of optimization show that an optimal battery that has 85 percent higher energy can be made with the same cell length. The results also show that an optimum cell battery can be obtained with a 25 percent decrease in weight and 23 percent in dimensions while keeping the energy content constant.