Students

Current

Kimia Yarijani – Master thesis –  Supervisor Muhammad Adrian

My research focuses on the analysis of biopolymer granules from traceless materials GmbH using nuclear magnetic resonance (NMR) techniques. The aim is to develop a fast, non-destructive quality control method and contribute to a better understanding of biopolymer aging mechanisms. The study involves relaxometry and diffusometry measurements to analyze differences in molecular mobility between various samples. The results will be correlated with reference methods to evaluate the potential of NMR for material characterization.

Office: TUHH campus, building L, room 3019
Email:
Tel: +49 40 42878 4079

Niels Meinköhn – Master Thesis – Supervisor: Till Lenczyk 

My research focuses on investigating convective flows in phase-change materials using nuclear magnetic resonance (NMR) techniques. For this purpose, a Rayleigh–Bénard cell with an NMR-compatible temperature control system has been designed and constructed. The aim is to visualise low-velocity flows using MRI-based velocity measurements. In addition, temperature distributions within the Rayleigh–Bénard cell are analysed. The results are compared with those of similar studies to assess the measurement methodology.

Office: TUHH campus, building L, room 3019
Email:
Tel: +49 40 42878 4079

Tirtha Amonkar – Master thesis – Supervisor Melis Özdemir

My research focuses on investigating wall effects in three-dimensional (3D) gas-solid fluidized bed hydrodynamics, with an emphasis on understanding the impact of fluidized bed diameter on bubble and particle behaviour. This includes the detailed characterization of bubble properties such as size, rise velocity, and spatial distribution, as well as particle velocities using Magnetic Resonance Imaging (MRI). A systematic experimental study will be conducted across multiple bed sizes with different particles at various superficial gas velocities to understand how wall effects alter hydrodynamic behaviour. These findings aim to develop an empirical correlation to predict bubble size as a function of bed diameter, addressing a critical gap in existing literature where most correlations neglect the significant influence of bed geometry.

Office: TUHH campus, building L, room 3045
Email:
Tel: +49 40 42878 4079


Alumni

  • M. Sc. Benjamin Rahimian (2025) „Magnetic Resonance and Optical Imaging of Dynamically Structured Bubbling in Vibrated Gas-Solid Fluidized Beds“
  • M. Sc. Fin Conje (2025) „Integral experiments and magnetic resonance imaging of the liquid distribution in structured packings“
  • M. Sc. Kim Meyer (2025) „Particle Image Velocimetry and Magnetic Resonance of Fluidized Bed Particle Systems“
  • M. Sc. Zohra Ahmadzai (2025) „Hydrodynamics of a vibrated pseudo-two-dimensional gas-solid fluidized bed“
  • M. Sc. Niels Meinköhn (2026) „“Non-invasive investigation of convective heat flow in phase change materials using magnetic resonance imaging“