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Proposing Institution

Lehrstuhl für Anlagen- und Prozesstechnik,TUM
Project Manager

Simon Hill
Boltzmannstr. 15
85747 Garching
Abstract
To optimize the separation performance of structured packings in rectification processes a thorough understanding of the hydrodynamics and transport phenomena inside these column internals is vital. This project represents an approach to the numerical simulation of rectification processes using the Volume-Of-Fluid (VOF) method for two-phase hydrodynamics and the Continuous-Species-Transfer (CST) method to consistently incorporate interfacial species transfer. One part of this project deals with the investigation of the hydrodynamics only. Thereby the gaseous flow for different geometries as a well as different pressure gradients is analysed, focusing on the visualization and understanding of the transient flow structures occurring at higher flow rates. Also, a two-phase flow simulation is conducted to identify the distribution of the liquid phase. This is done in way that the setup imitates the conditions of a column operated with total reflux. For interfacial species transfer the CST method by Marschall et al. (2012) and Deising et al. (2015) is adapted to describe the process of distillation instead of absorption. Furthermore, suitable boundary conditions for the transported species are established. During the final step of the project all aspects investigated and developed before are joined to a setup which is capable of simulating the rectification process in a column. This has not yet been studied in prevailing literature but can have a huge scientific but also technical innovation potential, as having a tool to evaluate the separation performance of a packing will enable the optimization of its design. All code extensions are implemented in the CFD software package OpenFOAM®.

Impressum, Conny Wendler