Sharif Digital Repository

Liquid-Liquid coalescers are devices used for increasing the droplet size of the dispersed phase in continuous phase flow such as water droplets in oil flow. The scope of this work is a literature study on the coalescence phenomenon and CFD modeling in general. A mathematical model for simulating coalescence of water droplets in continuous oil flow by the use of different commercial coalescers. The basis for the model are plate-type coalescer and swirl-based coalescer. So, the simulations are done by Eulerian-Lagrangian method. Different aspects of the performance of the coalescers are studied on the rate of coalescence such as impact of changing droplet’s inlet diameters, impact of the... 

Mergers and acquisitions are one of the easiest and sometimes the only way to stay in the market for small or low performing companies. In this research, which consists of two main parts, the impact of merger and acquisition on the stock price and financial statements of the involved companies that were listed in Iran stock exchange market was studied between 2007 and 2012.The first step, through an event study, abnormal stock returns of the targeted companies were studied in time spans of five and ten days before and after the merger and acquisition event. Then a t test was applied in order to examine whether this transaction had resulted in positive abnormal return for the shareholders or... 

Liquid marbles are droplets enwrapped by a layer of micro/nanoparticles. Due to the insulation of inner fluid from the environment, the lower evaporation rate of the fluid, and the capability of motion even on hydrophilic surfaces, these liquid marbles, as an alternative to conventional droplets, have attracted the attention of researchers in digital microfluidics. Utilizing ferrofluid as the liquid core of the liquid marbles enables remote control over the liquid marbles by an external magnetic field. In this research, the dynamic behavior of ferrofluid liquid marbles under the magnetic field generated by an electromagnet is investigated. In this research, governing physics on the motion of...