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TU Berlin

Inhalt des Dokuments

Transport Phenomena

Lupe

Objective of this research area is the detailed investigation of selected transport phenomena like heat, mass or momentum transport on micro-scale. Still a lack of knowledge exists in the understanding of many phenomena. With systematic experimental and numerical investigations, we aim on closing the gap for specific systems e.g. film-, rivulet- and droplet-flow on free surfaces or heat transfer between particles and walls. 

Contact Person: Georg Brösigke

Research Approach

  • Experimental methods like micro Stereo Particle Image Velocimetry (µSPIV), Light induced Fluorescence (LIF), Structured Light Scanning (SLS)
  • Numerical Methods such as Computanioal Fluid Dynamics (CFD) including Cahn-Hilliard Navier Stokes (CHNS), Volume of Fluid (VoF) and Direct Numerical Simulations (DNS)
  • Development of sophisticated transport phenomena models in order to derive integral models for process simulation

Liquid Flow in Process Equipment

Lupe

3D Velocity Profiles on Inclined Micro- and Macro Structured Surfaces

The 3D velocity field of liquid over complex surfaces is investigated using a Stereo-µ-Particle Image Velocimetry (µSPIV) setup. The influence of micro- and macro-structures on the momentum transport is investigated in order to fundamentally understand flow patterns and structures in structured packings of chemical plants. Moreover, the long term objective is to identify the influence of those structures on mass transfer due to induced manipulations on the film structures by e.g. vortices.

Lupe

Investigation of Film Thickness and Wetting Phenomena on Complex Surfaces

For understanding liquid film flow, characteristic properties like thickness and wetting behavior are crucial. In order to develop accurate models for the design of separation processes, fundamental experiments are carried out by both Light Induced Fluorescence and Structured Light Scanning.

Lupe

DNS-Simulations with Cahn-Hilliard Navier-Stokes

Dynamic contact line simulations of droplets and rivulets on solid surfaces are carried out with an in-house code based on the Cahn-Hillard-Navier-Stokes Equations. The Finite Element code was especially developed as a modular system in order to test submodels and formulations for energy potentials against each other efficiently.

Gas Flow in Process Equipment

Lupe

CFD Simulations to Meso-Scale Model

Volume of Fluid (VoF) simulations for one and two phase flows are conducted using OpenFOAM® for various environments. Validation can be ensured by carrying out specific experimental investigations as well. On that basis a new Meso-Scale Model for simulating packed columns is developed.

Lupe

Direct Numerical Simulation of Conjugated Heat Transfer

In order to carry out fundamental research on the field of heat transfer between rolling particles and walls the OpenFOAM® an own Finite Volume solver was developed based on the standard solver chtMultiRegionFOAM. The system was investigated in laminar and turbulent flow regime with Direct Numerical Simulations in respect to both, turbulence and heat transfer.

Development of Measuring Cells

Development of measuring cells with explicitely defined boundary conditions for reliable data for comparison between experiments and simulations

Lupe

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