Prof. Dr. Alexandra von Kameke

Department of Mechanical Engineering and Production
Hamburg University of Applied Sciences
Berliner Tor 21
20099 Hamburg, Germany
Email: Prof. Dr. Alexandra von Kameke
Phone: +49 40 428 75 - 8624

 


Research Interest

 

  •  2D-Turbulence
  • Reaction-Diffusion-Advection Systems
  • Faraday Flow 
  • Vorticity generation
  • Global and local mixing dynamics and statistics
  • Turbulent inter-scale kinetic energy transfer
  • Pipe turbulence
  • Reaction front spreading


We are glad to welcome our new employee Raffaele Colombi (M.Sc. in Aeronautical Engineering, Linköping Sweden). He will be concerned with the DFG-Project:

 

"Generation of energy and vorticity production by surface waves through two-dimensional turbulence effects"

 

We study energy condensation in quasi two-dimensional turbulence that is driven by surface waves. This physical mechanism is investigated with regard to its potential for energy production.
In two-dimensional turbulence the net energy is transferred from small scales to large scales. Energy condensation develops when large scale friction is low and energy piles up at large scales. In this way, energy condensation produces large ordered flow structures from disordered small scale forcing that drives the two-dimensional turbulence. It was shown only recently that two-dimensional turbulence can also be driven by surface waves [von Kameke et al. 2011].

However, it is unclear if two-dimensional turbulence and energy condensation can also be driven by more naturally occurring unordered forcing as for instance provided by oceanic surface waves. Further, it is not yet fully understood how non-breaking surface waves generate horizontal vorticity, and if the waves have to possess certain properties, i.e., if they need to be standing, non-linear or monochromatic [Francois et al. 2014, Filatov et al. 2016]. Additionally, the necessary boundary conditions for energy condensation are vague and need clarification. And, it needs to be addressed if the process of energy condensation is stable to the introduction of further sources of drag, i.e., when a turbine is plugged into the fluid flow in order to retrieve energy.

Here, these open points are to be investigated using a Faraday experiment [von Kameke et al. 2010, von Kameke et al. 2011, von Kameke et al. 2013]. The generation of vorticity by the surface waves and the influence of the boundary- and forcing- conditions on energy condensation will be studied as well as the velocity statistics. To this end the full unsteady three-dimensional velocity field at the water surface and below the water surface needs to be recorded which has not been investigated so far. The latest optical methods will be used, such as time-resolved high speed planar particle image velocimetry and time-resolved three-dimensional particle image velocimetry and particle tracking. The complete velocity data allows to doubtlessly verify, if the flow obtained in each case is two-dimensional and, if energy condensation takes place. Two-dimensionality is analyzed on the basis of energy and enstrophy spectra and spectral fluxes, calculated with the aid of a novel filtering method [Eyink, 1995, von Kameke et al. 2011, von Kameke et al. 2013]. Moreover, existing three- dimensional flow structures will be identified and characterized. The forcing, exerted by the surface waves on the fluid-particles, and the resulting vorticity generation will be quantified by measuring the fluid surface elevation simultaneously to the PIV measurements and the subsequent usage of Lagrangian methods [von Kameke et al. 2011, von Kameke et al. 2013, LaCasce 2008] that allow to correlate both movements. The objective of this study is to uncover a new effective mechanism to retrieve renewable energy and will broaden insight into surface wave physics and two-dimensional turbulence. 

 

Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 395843083

Publications

A

  • A. von Kameke, F. Huhn and V. Pérez-Muñuzuri (2012). Asymptotic diffusion coefficients and anomalous diffusion in a meandering jet-flow under environmental fluctuations. Phys. Rev.. 85 [Abstract] [doi] [www] [BibTex]

  • A. von Kameke, F. Huhn, A. P. Muñuzuri, and V. Pérez-Muñuzuri (2013). Measurement of Large Spiral and Target Waves in Chemical Reaction-Diffusion-Advection Systems: Turbulent Diffusion Enhances Pattern Formation. Phys. Rev. 110 [Abstract] [doi] [www] [BibTex]

  • A. von Kameke, F. Huhn, G. Fernández-García, A. P. Muñuzuri, and V. Pérez-Muñuzuri (2011). Double Cascade Turbulence and Richardson Dispersion in a Horizontal Fluid Flow Induced by Faraday Waves. Phys. Rev.. 107 [Abstract] [doi] [www] [BibTex]

  • A. von Kameke, F. Huhn, G. Fernández-García, A. P. Muñuzuri, and V. Pérez-Muñuzuri (2010). Propagation of a chemical wave front in a quasi-two-dimensional superdiffusive flow. Phys. Rev.. 81 [Abstract] [doi] [www] [BibTex]

B

  • Bauer, C.; Wagner, C.; von Kameke, A. (2019). Kinetic energy budget of the largest scales in turbulent pipe flow. PHYSICAL REVIEW FLUIDS. 4 (22), 064607. [Abstract] [doi] [www] [BibTex]

C

  • Colombi, R.; Schlüter, M.; Kameke, A.v.; (2020). Three Dimensional Flows Beneath a Thin Layer of 2D turbulence Induced by Faraday Waves. Experiments in Fluids. 62 (8), [Abstract] [doi] [BibTex]

F

  • F. Huhn, A. von Kameke, S. Allen-Perkins, P. Montero, A. Venancio, and V. Pérez-Muñuzuri (2012). Horizontal Lagrangian transport in a tidal-driven estuary - transport barriers attached to prominent coastal boundaries. Cont. Shelf Res. 39-40, 1-13. [Abstract] [doi] [www] [BibTex]

  • F. Huhn, A. von Kameke, V. Pérez Muñuzuri, M. J. Olascoaga, and F. J. Beron-Vera (2012). The impact of advective transport by the South Indian Ocean Countercurrent on the Madagascar plankton bloom. Geophys. Res.. 39 [Abstract] [doi] [www] [BibTex]

  • Fitschen, J.; Hofmann, S.; Wutz, J.; Kameke, A. v.; Hoffmann M.; Wucherpfennig T.; Schlüter, M. (2021). Novel Evaluation Method to Determine the Local Mixing Time Distribution in Stirred Tank Reactors. Chemical Engineering Science: X. 10 [Abstract] [doi] [BibTex]

G

  • Guiu-Souto, J. , Michaels, L., Kameke, Von A., Carballido-Landeira, J and Muñuzuri, A.P (2013). Turing inestability under centrifugal forces. Soft. Matter. 9 [Abstract] [doi] [www] [BibTex]

K

  • Kameke, A.v.; Kastens, S.; Rüttinger, S.; Herres-Pawlis, S.; Schlüter, M,: (2019). How coherent structures dominate the residence time in a bubble wake: An experimental example. Chemical Engineering Science. 207 317-326. [Abstract] [doi] [www] [BibTex]

  • Kexel, F.; Kameke, A.v.; Oßberger, M.; Hoffmann, M.; Klüfers, P.; Schlüter, M. (2020). Bildgebende UV/VIS Spektroskopie zur Untersuchung des Einflusses der Fluiddynamik auf die Selektivität und Ausbeute von schnellen konkurrierenden konsekutiven gasflüssig Reaktionen. Chemie Ingenieur Technik. [Abstract] [doi] [BibTex]

  • Kexel, F.; Kameke, A.v.; Tenhaus, J.; Hoffmann, M.; Schlüter, M. (2021). Taylor bubble study of the influence of fluid dynamics on yield and selectivity in fast gas-liquid reactions. Chemie Ingenieur Technik. 93 (5), 830-837. [Abstract] [doi] [BibTex]

  • Kexel, F.; Kastens, S.; Timmermann, J.; Kameke, A. v.; Schlüter, M. (2021). Experimental Investigation of Reactive Bubbly Flows—Influence of Boundary Layer Dynamics on Mass Transfer and Chemical Reactions. 267–307. [Abstract] [doi] [BibTex]

  • Kuschel, M.; Fitschen, F.; Hoffmann, M.; Kameke, A. v.; Wucherpfennig, T.; Schlüter, M. (2021). Validation of Novel Lattice Boltzmann Large Eddy Simulations (LB LES) for Equipment Characterization in Biopharma. Processes. 9 (6), 950. [Abstract] [doi] [BibTex]

L

  • Llamas, C.G.; Spille, C.; Kastens, S.; Paz, D.G.; Schlüter, M.; von Kameke, A. (2020). Potential of Lagrangian Analysis Methods in the Study of Chemical Reactors. Chemie Ingenieur Technik. 95 (5), 540-553. [Abstract] [doi] [BibTex]

S

  • Schlüter, M.; Kexel, F.; Kameke, A. v.; Hoffmann, M.; Herres-Pawlis, S.; Klüfers, P.; Oßberger, M.; Turek, S.; Mierka, O.; Kockmann, N.; Krieger, W. (2021). Visualization and Quantitative Analysis of Consecutive Reactions in Taylor Bubble Flows. 507–543. [doi] [BibTex]

  • Susanne Reichinnek, Alexandra von Kameke, Anna M. Hagenston, Eckehard Freitag, Fabian C. Roth, Hilmar Bading, Mazahir T. Hasan, Andreas Draguhn, Martin Both (2012). Reliable optical detection of coherent neuronal activity in fast oscillating networks in vitro. NeuroImage. 60 139–152. [Abstract] [doi] [www] [BibTex]