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Ethanol is produced through two methods of fermenting and hydration of ethylene. In this article, regarding low rates of ethanol production in Iran (1.510 8 liters per year) and extreme requirement of global industry to ethanol as a fuel additive, the capacity of ethanol production in Iran has been discussed. Adding ethanol to fuels would make them environmental friendly and as a result, huge amounts of ethanol would be required. It is declared that Iran, having the biggest ethylene pipeline in the world, has the potential of massive ethanol production and could play a pivotal role for global ethanol manufacturing in the near future. In addition, producing ethanol and exporting it is investigated via the simulation of an ethanol factory. Direct hydration of ethylene is the recommended method in this study. Simulation of this process was done using HYSYS software and the optimization results are illustrated based on Aspen Plus software.

In this article, a behavioral analysis of velocity boundary layer in a flat plate heat exchanger in laminar flow condition through CFD simulation using FLUENT software is done. The main objective of this study is to determine the velocity vectors between the flat plates of the heat exchanger. In addition, wake occurrence, differences of velocity at different surfaces between plates, angles of velocity vectors and the effect of wake phenomenon on the shear stresses exerted on the plates are discussed in detail. The study graphically illustrates results based on fluid’s behavior by a 3D and 2D simulation with air and water as cold and hot streams that affect plate’s situation and its hydro dynamical operations. Consequently, some important design features regarding wake point occurrence and pressure loss are investigated. In addition, eddy current and reverse flows in the wake area and the angles of the velocity vectors are described.

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