Bachelor theses / Master theses / Diploma theses / Compulsory internship

Experimental investigation of two-phase flow on fixed valve trays for distillation columns (Id 317)

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Foto: Eye-Catcher Single Valve ©Copyright: Dr. Philipp WiedemannDistillation columns are used for the thermal separation of multicomponent mixtures in the chemical industry. Owing to increased energy supply from renewable sources a more flexible operation of such apparatuses is already demanded. However, enlarged over- and under load modes are challenging with respect to design, since a high separation efficiency needs to be attained anyway. Especially in case of fixed valve trays there are presently no reliable methods for estimating the influence of the tray design on the complex two-phase flow of liquid and vapor. Therefore, a current research project aims at detailed investigations of the two-phase flow at single valves in order to evaluate their performance.
Within the frame of a student internship experimental investigations will be carried out using an existing lab-scale test rig. The phase distribution of gas and liquid will be measured around different valves with high temporal and spatial resolution by specifically developed sensors. Subsequently, measured data will be used to quantify and model the momentum transfer from the gas inlets to the liquid phase. The results will be used in future developments of numerical models to predict the two-phase flow on such trays.

Department: Experimental Thermal Fluid Dynamics

Contact: Dr. Wiedemann, Philipp


  • studies in chemical/process/energy/mechanical engineering
  • interest in experimental work
  • creativity
  • good written and oral communication skills in English and German


  • start: from Sept. 2022
  • working in a multi-disciplinary team
  • remuneration according to HZDR internal regulations