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Efficient and economical performance of distillation equipment is vital to many processes. Distillation is one of the unit operations most used separation techniques of components. Its great importance is due to the capacity of purify components of a mixture using the volatility difference among them as driving force. Due to the development of the information technology (IT), in the numerical methods and improvement in models of multiphase flows, the investigation of complex turbulent flow problems is possible. One way to investigate these problems is to use the computational fluid dynamics (CFD) tecniques. That way, it was adopted for this study a CFD model, with the main objective to evaluate the transport phenomena for the non-isothermal flows (ethanol-water) through the CFD techniques to simulate a distillation sieve tray. The proposed model is based in a heterogeneous, threedimensional, SST turbulence model, and Eulerian-Eulerian framework at 1 atm. The continuity and momentum and energy conservation equations were used to describe the flow. The simulated geometry was based on experimental work of Solari e Bell (1986), to which they were observed the influence with and without of the inlet downcomer on sieve tray. The results showed besides the hydraulic parameters, the temperature profiles. Thus, the simulations of the indicated a strong influence of the liquid velocity profile on the temperature fields on sieve tray for the domain with the downcomer inlet. The methodology used in this work showed adequate, being a viable and important tool in the design and optimization of distillation tray.

SIMULTANEOUS MOMENTUM AND ENERGY TRANSFER ANALYSIS IN A DISTILLATION COLUMN SIEVE TRAY USING CFD TECHNIQUES: STUDY OF INFLUENCE OF THE INLET DOWNCOMER