Dr Matthias Kramer

Lecturer and Safety WHS Coordinator
School of Engineering and Information Technology

LOCATION

Room 127, Building 20
UNSW Canberra Campus
Northcott Drive, Campbell, ACT 2600

  • ABOUT
  • PUBLICATIONS
  • RESEARCH ACTIVITIES

Matthias Kramer is a Lecturer at the School of Engineering and Information Technology (SEIT), UNSW Canberra. Prior to this, he was working at the University of Queensland and the University of Stuttgart. Matthias Kramer received a competitive fellowship from the German Research Foundation (DFG) entitled ’Air-water mass transfer at hydraulic structures’.

Scholarships and supervision

Scholarships of $35,000 (AUD) are available for PhD students who achieved High Distinction (H1) in their undergraduate program and/or have completed a Masters by Research.

If you are interested in working on the topics listed below (or closely related areas), please perform a self-assessment (https://selfassessment.research.unsw.edu.au/) and send me your me your CV, academic transcripts and a research proposal consisting of motivation, (brief) literature review, research objectives and proposed methodology.

Research topics and interests

If you want to know more about my research, please refer to my Google Scholar or Research Gate. Topics of interest are in the field of open channel flow with a focus on air-entrainment, flow measurement instrumentation, energy dissipation and design of hydraulic structures. Other areas of interest are listed below:

  • Physical modelling
  • Open-channel flows 
  • Pumps and turbines
  • Hydraulic structures
  • Air-water flows
  • Stepped spillways
  • Hydraulic jumps
  • Measurement instrumentation
  • Phase-detection probes
  • Signal processing 
  • Image-based velocimetry

 

Lectures/Courses taught

  • ZEIT2020: Civil Engineering Materials (S1)
  • ZEIT2602: Hydraulic Engineering (S2)
  • ZEIT4604: Hydrology and Environmental Engineering Practice (S1)

 

Current students

  • Hanwen Cui (graduated at UNSW Sydney, joint supervision with Dr Stefan Felder)

 

Awards and Grants

  • Open Fund Research, State Key Laboratory, Sichuan University
  • UNSW Rector Funded Visiting Fellowship (RFVF)
  • Research Infrastructure Scheme (RIS): Combined open-channel/wave flume
  • Substantial merit-based start up grant (UNSW Canberra)
  • Establishment award (UNSW Canberra)
  • DFG research fellowship ’Air-water mass transfer at hydraulic structures’

 

Professional involvement

  • Executive member of the AFMS (Australian Fluid Mechanics Society) Canberra Chapter
  • IAHR Member - International Association for Hydro-Environment Engineering and Research
  • Reviewer for selected journals, including International Journal of Multiphase Flow (IJMF), Journal of Hydraulic Research (JHR), Journal of Hydraulic Engineering (JHE) and Journal of Hydro-Environment Research (JHER)

 

 

Journal articles

Kramer M; Valero D, 2020, 'Turbulence and self-similarity in highly aerated shear flows: The stable hydraulic jump', International Journal of Multiphase Flow, vol. 129, pp. 103316 - 103316, http://dx.doi.org/10.1016/j.ijmultiphaseflow.2020.103316

Kramer M; Hohermuth B; Valero D; Felder S, 2020, 'Best practices for velocity estimations in highly aerated flows with dual-tip phase-detection probes', International Journal of Multiphase Flow, vol. 126, pp. 103228 - 103228, http://dx.doi.org/10.1016/j.ijmultiphaseflow.2020.103228

Kramer M; Hohermuth B; Valero D; Felder S, 2020, 'On velocity estimations in highly aerated flows with dual-tip phase-detection probes - closure', International Journal of Multiphase Flow, pp. 103475 - 103475, http://dx.doi.org/10.1016/j.ijmultiphaseflow.2020.103475

Kramer M; Chanson H; Felder S, 2019, 'Can we improve the non-intrusive characterization of high-velocity air–water flows? Application of LIDAR technology to stepped spillways', Journal of Hydraulic Research, pp. 1 - 13, http://dx.doi.org/10.1080/00221686.2019.1581670

Kramer M; Valero D; Chanson H; Bung DB, 2019, 'Towards reliable turbulence estimations with phase-detection probes: an adaptive window cross-correlation technique', Experiments in Fluids, vol. 60, http://dx.doi.org/10.1007/s00348-018-2650-9

Kramer M; Chanson H, 2018, 'Optical flow estimations in aerated spillway flows: Filtering and discussion on sampling parameters', Experimental Thermal and Fluid Science, vol. 103, pp. 318 - 328, http://dx.doi.org/10.1016/j.expthermflusci.2018.12.002

Kramer M; Chanson H, 2018, 'Transition flow regime on stepped spillways: air–water flow characteristics and step-cavity fluctuations', Environmental Fluid Mechanics, vol. 18, pp. 947 - 965, http://dx.doi.org/10.1007/s10652-018-9575-y

Kramer M; Terheiden K; Wieprecht S, 2018, 'Pumps as turbines for efficient energy recovery in water supply networks', Renewable Energy, vol. 122, pp. 17 - 25, http://dx.doi.org/10.1016/j.renene.2018.01.053

Kramer M; Wieprecht S; Terheiden K, 2017, 'Minimising the air demand of micro-hydro impulse turbines in counter pressure operation', Energy, vol. 133, pp. 1027 - 1034, http://dx.doi.org/10.1016/j.energy.2017.05.043

Kramer M; Wieprecht S; Terheiden K, 2016, 'Penetration depth of plunging liquid jets - A data driven modelling approach', Experimental Thermal and Fluid Science, vol. 76, pp. 109 - 117, http://dx.doi.org/10.1016/j.expthermflusci.2016.03.007

Kramer M; Terheiden K; Wieprecht S, 2016, 'Safety criteria for the trafficability of inundated roads in urban floodings', International Journal of Disaster Risk Reduction, vol. 17, pp. 77 - 84, http://dx.doi.org/10.1016/j.ijdrr.2016.04.003

Kramer M; Terheiden K; Wieprecht S, 2015, 'Optimized design of impulse turbines in the micro-hydro sector concerning air detrainment processes', Energy, vol. 93, pp. 2604 - 2613, http://dx.doi.org/10.1016/j.energy.2015.10.022

Kramer M; Wieprecht S, 2013, 'Implementation studies of small energy converters in water supply systems', DVGW Energie Wasser-Praxis

Conference Papers

Kramer M; Hohermuth B; Valero D; Felder S, 2020, 'Leveraging event detection techniques and cross-correlation analysis for phase-detection probe measurements in turbulent air-water flows', in Proceedings of the 8th IAHR International Symposium on Hydraulic Structures, ISHS 2020, The University of Queensland, presented at 8th IAHR International Symposium on Hydraulic Structures ISHS2020, http://dx.doi.org/10.14264/uql.2020.591

Kramer M, 2019, 'Particle size distributions in turbulent air-water flows', in Calvo L (ed.), Proc. 38th IAHR World Congress, IAHR Publication, Panama City, pp. 5722 - 5731, presented at 38th IAHR World Congress, Panama City, 01 September 2019 - 06 September 2019, http://dx.doi.org/10.3850/38WC092019-0680

Valero D; Kramer M; Bung D; Chanson H, 2019, 'A stochastic bubble generator for air-water flow research', in Calvo L (ed.), Proc. 38th IAHR World Congress, IAHR Publication, Panama City, pp. 5714 - 5721, presented at 38th IAHR World Congress, Panama City, 01 September 2019 - 06 September 2019, http://dx.doi.org/10.3850/38WC092019-0909

Kramer M, 2018, 'Free-Surface Instabilities in High-Velocity Air-Water Flows down Stepped Chutes', in 7th IAHR International Symposium on Hydraulic Structures, ISHS 2018, Aachen, Germany, presented at 7th International Symposium on Hydraulic Structures, Aachen, Germany, 15 May 2018 - 18 May 2018, http://dx.doi.org/10.15142/T3XS8P

Kramer M, 2013, 'Energy recovery in drinking water supply systems - experimental investigations on hydraulic turbines', Graz, Austria, presented at Proceedings of the 15th young hydraulic scientists meeting, Graz, Austria, 31 July 2013 - 02 August 2013

Kramer M; Wieprecht S, 2012, 'Implementation studies of small energy converters in water supply systems', Munich, Germany, presented at Proceedings of the 2nd IAHR Europe Conference, Munich, Germany, 27 June 2012 - 29 June 2012

Kramer M; Wieprecht S, 2012, 'Investigations on micro-hydro turbines in drinking water supply systems', Stuttgart, presented at Proceedings of the 26th colloquium on water supply systems, Stuttgart, 16 February 2012 - 16 February 2012

Kramer M; Wieprecht S, 2011, 'Coupled traffic- and hydrodynamic modelling for traffic control during evacuations', Hannover, Germany, presented at Proceedings of the 13th young hydraulic scientists meeting, Hannover, Germany, 03 August 2011 - 06 August 2011

Reports

Kramer M, 2020, Air-water flows at hydraulic structures: Experimental investigations of interfacial characteristics and air-water mass transfer, Technical report, School of Engineering and Information Technology (SEIT), UNSW Canberra, KR 4872/2-1, http://dx.doi.org/10.13140/RG.2.2.19550.25928

Kramer M; Wieprecht S, 2015, Efficient energy recovery in water supply systems, TB01/2015

Kramer M; Wieprecht S, 2013, Stability of cars in urban floodings

Kramer M; Wieprecht S, 2012, Implementation studies of small energy converters in water supply systems, TB 09/2012

Kramer M; Wieprecht S, 2010, Physical model investigations on the hydropower plant Metzingen at the Erms, TB 04/2010

Theses / Dissertations

Kramer M, 2015, Air demand of impulse turbines in counter pressure operation, University of Stuttgart, http://dx.doi.org/10.18419/opus-651

Air-water flow turbulence
Signal processing for phase-detection probes

Presentation

White waters are often observed in free-surface flows such as hydraulic jumps or in supercritical flows over smooth or rough beds. Entrained air limits the use of common monophase flow measurement instrumentation and has motivated the development of specialized measurement equipment for air-flow research.

The aim of this research project is to improve the interpretation of intrusive phase-detection probe signals, thereby providing a robust estimation of mean velocities and advanced turbulence properties. One major outcome is the phase-detection signal processing toolbox, which contains the adaptive window cross-correlation (AWCC) technique for processing dual-tip phase-detection probe signals in highly aerated flows. The code is written in Matlab and comes with a representative data set, publicly available on Github (see related links below). Our research goal for the future is to advance the characterisation of aerated boundary layer flows as counterpart to the existing monophase flow theory.

The image on the right shows a typical aerated flow down a stepped spillway. The spill had an Annual Exceedance Probability of around AEP = 1% and  occurred in March 2017 at the Hinze dam, located in the Gold Coast hinterland.


Key publications

  • Kramer, M., Valero, D., Chanson, H. and Bung, D. (2019). Towards reliable turbulence estimations with phase-detection probes: an adaptive window cross-correlation technique. Experiments in Fluids 60(2).
  • Kramer, M., Hohermuth, B., Valero, D. and Felder, S. (2020). Best practices for velocity estimations in highly aerated flows with dual-tip phase-detection probes. International Journal of Multiphase Flow, under review.
Key Contact:
Project Team UNSW:
Project Collaborators: External:
ETH Zurich
IHE Delft