IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : Technical Divisions : Hydraulics : Fluid Mechanics

IAHR Fluid Mechanics Committee

Next Events

  • 8th International Symposium on Environmental Hydraulics (ISEH) 4-7 June 2018, University of Notre Dame, Indiana, USA Website
  • 13th International Conference on Hydrodynamics (ICHD) 2-6 September 2018, Songdo, Incheon, Korea Website
  • IAHR Gerhard Jirka Summer School-Environmental Fluid Mechanics, 8-16 January 2018, Campo Grande,Brazil Website

Leadership Team

Chair (2017-2021)

 
University of Notre Dame
College of Engineering
UNITED STATES OF AMERICA

Vice Chair

 
Prof. Vladimir Nikora
University of Aberdeen
School of Engineering
UK

Past Chair

Prof. Mohamed Salah Ghidaoui
The Hong Kong University of Science and Technology
Department of Civil & Environmental Engineering 
HONG KONG

Members

Co-opted Members
IAHR Hydraulics Division Programme Officer

Mission statement 

The focus of our committee is on fundamental and applied environmental fluid mechanics in support of hydraulic research. Particular emphasis is on the fundamentals of transport and mixing phenomena in turbulent flows such as contaminant transport processes in rivers, lakes and coastal regions, anthropogenic influences (e.g., heat, dissolved and suspended organic/inorganic material) and sediment dynamics. Main focus areas for our committee include:
  • stratified flows (e.g., gravity currents, stratified jets and plumes, internal waves) and flows in rotating fluids, where at larger scales the rotation of the earth becomes relevant;
  •  shallow flows, in which the length scale in one direction (depth) is much smaller than the length scales in the other directions, and for which bed friction affects the development of the large-scale quasi two-dimensional structures;
  • flow and turbulence structure over rough boundaries and porous media, including canopies and vegetation.
  • two-phase laminar and turbulent flows with particular emphasis on sediment transport, high concentration mixtures showing non-Newtonian fluid behavior (e.g., mud slides, debris flows) and gas-water mixture flows caused by air entrainment at high-velocity in hydraulic structures or by cavitating flows.
  • interface problems. The air-water interface on the surface of a water body remains enigmatic, especially concerning the generation, growth, and instabilities of wind waves. Similarly, the water-sediment interface at a stream bed separating turbulent water flow from the behavior of granular media has not been successfully described.  Solid-water interfaces encountered in biological applications (e.g. boundary layers on individual blades of vegetation or coral branches) present another unique challenge.
Major advances are expected over the next couple of years in gaining insights into the dynamics of these flows using state of the art experimental (e.g., particle image velocimetry) and numerical (e.g., direct numerical simulation DNS, large eddy simulation LES, large-scale predictive models) techniques. In particular, this should allow a better understanding of the role played by the large-scale coherent structures and the interactions between these large scales and the three-dimensional turbulence, and of the effect of the large-scale turbulence on bottom friction and morphodynamic processes.
 
Three of the most important and imminent challenges in environmental fluid mechanics and environmental hydraulics are to understand:
  • to what extent the physics of these flows is dependent on scale effects,
  • how the physics changes between the simpler geometries studied in the laboratory in controlled environments or using DNS/LES simulations and the complex geometries present at field scale,
  • how detailed understanding of the physics of simpler types of flows (e.g., jets, wakes, mixing layers) can result into better predictive analytical models that can be applied for engineering predictions and design.
These challenges also define our long term objectives. Additionally, several challenges remain related to understanding mass exchange processes relevant to hydraulics. For example, concepts such as large-scale eddy diffusivity or hydrodynamic dispersion cannot be rigorously related to the actual flow or solid matrix properties. Empiricism prevails. Advances are urgently needed to provide the tools for the solution of modern hydraulic engineering problems - which are increasingly devoted to the prediction of the transport and deposition of materials in the natural or engineered environment. Double-diffusion is another phenomenon which has not gained needed attention.

Past Events and Publications

Gerhard Jirka Summer School on Environmental Fluid Mechanics
The School is a signature IAHR event that was founded and energised by the late Professor Gerhard Jirka, with a vision to bring together renowned experts and top graduate students from around the world for a unique, interactive learning experience in environmental fluid mechanics.  A central objective of the School has always been to combine theory, experiments and applications, with an emphasis on basic theoretical principles (and their mathematical description) as well as consideration of examples of engineering design and environmental applications.  This objective is realised in the School through formal, in-class lectures as well as informal, out-of class excursions and visits. In the School, the students have plenty of opportunities to present their own research projects and to discuss and seek advice on these projects from Lecturers and fellow students.

The school was previously held in:
  • Karlsruhe, Germany, 1999
  • Dundee, Scotland, 2001
  • Budapest, Hungary, 2004
  • Karlsruhe, Germany, 2006
  • Santiago, Chile, 2009 
  • Lucerne, Switzerland, 2012
  • Hong Kong, China, 2014 More info
  • Mato Grosso do Sul (UFMS), Campo Grande, Brazil, 2018 Website
Environmental Hydraulics (ISEH)
  • 8th International Symposium on Environmental Hydraulics (ISEH) 4-7 June 2018, University of Notre Dame, Indiana, USA https://ceees.nd.edu/iseh2018
  • 7th International Symposium on Environmental Hydraulics (ISEH) 7-9 January 2014, Singapore Website Book of abstracts and Conference Report available at the Community area (only for members) click here
  • 6th International Symposium on Environmental Hydraulics (ISEH) 25-26 June 2010, Athens, Greece. Published by Taylor and Francis
  • 5th International Symposium on Environmental Hydraulics (ISEH) 4-7 December 2007, Arizona State University, Tempe, AZ, USA. Available at the IAHR Secretariat, contact: membership@iahr.org
  • 4th International Symposium on Environmental Hydraulics (ISEH) and the 14th Congress of the Asia and Pacific Division of the International Association of Hydro-Environment Engineering and Research, 15-18 December 2004, Hong Kong, China. Published by Taylor and Francis
  • 3rd International Symposium on Environmental Hydraulics (ISEH) with a Special Theme on Urban Fluid Dynamics, 5-8 December 2001, Tempe, Arizona, USA. 1 CD: US$ 30, 2 CDs: US$ 50. Contact don.boyer@asu.edu
  • 2nd International Symposium on Environmental Hydraulics (ISEH) 16-18 December 1998, Hong Kong, China. Published by Taylor and Francis
  • 1st International Symposium on Environment Hydraulics (ISEH) 1991 Hong Kong, China. Published by Taylor and Francis
Hydrodynamics (ICHD)
  • 13th International Conference on Hydrodynamics (ICHD) 2-6 September,2018 Songdo,Incheon,Korea Website
  • 12th International Conference on Hydrodynamics (ICHD) 18-23 September 2016, Egmond aan Zee,Contact: secr-mtt-3me@tudelft.nl
  • 11th International Conference on Hydrodynamics (ICHD) 19-24 October 2014, Singapore Website
  • 10th International Conference on Hydrodynamics (ICHD) 1-4 October 2012, Saint Petersburg, Russia
  • 9th International Conference on Hydrodynamics (ICHD) 11-15 October 2010, Shangai, China. Published by Hina Ocean Press. Download
  • 6th International Conference on Hydrodynamics (ICHD) 24-26 November 2004, Perth, Western Australia. Published by Taylor and Francis
  • 4th International Conference on Hydrodynamics (ICHD) 7-9 September 2000, Yokohama, Japan. Prof. K. Suzuki, Dept. of Naval Architecture and Ocean Engineering, Yokohama National University, Yokohama 240-8501, Japan. Contact  kaz@mhl.shp.ynu.ac.jp
  • 3rd International Conference on Hydrodynamics (ICHD) 12-15 October 1998, Seoul, Korea. Prof. Seung-Joon Lee, Dept. of Naval Architecture and Ocean Engineering, College of Engineering, Chungnam National University, 220 Kung-Dong, Yusong-ku, Taejon 305-764, Korea. Contact sjlee@naoe.chungnam.ac.kr
  • 2nd International Conference on Hydrodynamics (ICHD) 16-19 December 1996, Hong Kong. 1396 pages, 2 volumes. Published by Balkema.
  • 1st International Conference on Hydrodynamics (ICHD)
Stratified Flows (ISSF)
  • 8th International Symposium on Stratified Flows (ISSF) 29 August-1 September, 2016, San Diego, CA, USA, Website
  • 7th International Symposium on Stratified Flows (ISSF) 22-26 August 2011, Roma, Italy. issf2011@dicea.uniroma1.it
  • 6th International Symposium on Stratified Flows (ISSF) 11-14 December 2006, The University of Western Australia, Perth (abstracts and CD-ROM)
  • 5th International Symposium on Stratified Flows (ISSF) 10-13 July 2000, Vancouver, Canada. Contact lawrence@civil.ubc.ca
Shallow Flows (ISSF)
  • 4th International Symposium on Shallow Flows (ISSF),26-28 June 2017, Eindhoven, The Netherlands, Website
  • 3rd International Symposium on Shallow Flows (ISSF) 4-6 June 2012, Iowa, USA. Contact membership@iahr.org
  • 2nd International Symposium on Shallow Flows (ISSF) 10-12 December 2008, HONG KONG, China.
  • 1st International Symposium on Shallow Flows (ISSF) 16-18 June 2003, Delft, The Netherlands. Delft University of Technology.
Ultrasonic Doppler Methods (ISUD) Proceedings Archive
  • 9th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering (ISUD-9), Strasbourg, France, 27-29 August 2014 Website Proceedings
  • 8th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering (ISUD-8) Helmholtz Zentrum Dresden Rossendorf, Germany, 19-21 September 2012 Proceedings / Proceedings
  • 7th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering (ISUD-7) Chalmers University, Gothenburg, Sweden, 7 - 9 Apr 2010 Proceedings
  • 6th International Symposium on Ultrasonic Doppler Method for Fluid Mechanics and Fluid Engineering (ISUD-6) 9-11 September 2008, Prague, Czech Republic Proceedings
  • 5th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering (ISUD-5) ETH Zurich, Switzerland, 12-14 September 2006 Proceedings
  • 4th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering (ISUD-4) Hokkaido University, Sapporo, Japan, 6-8 September 2004 Proceedings
  • 3rd International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering (ISUD-3) 9-11 September 2002, EPFL, Lausanne, Switzerland Proceedings
  • 2nd International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering (ISUD-2) Paul Scherrer Institute, Villingen, Switzerland, 20-22 September 1999 Proceedings
  • 1st International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering (ISUD-1) Paul Scherrer Institute, Villingen, Switzerland, 9-11 September 1996 Proceedings
Flood Induced Vibration
  • 7th International Conference on Flow Induced Vibration (FIV2000) 19-22 June 2000, Lucerne, Belgium.
  • 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, and Flow-Induced Vibration and Noise, 16-21 November 1997, Dallas, USA. From M.P. Païdoussis, Dept of Mechanical Engineering, McGill University, 817 Sherbrooke Street West, Montreal QC, Canada .
  • Symposium on Flow Induced Structural Vibrations 14-16 August 1972, Karlsuhe, Germany
 Others
  • Short course on Winter School on Numerical Methods, Part I: Hyperbolic Equations and Applications, 2-13 February 2015, Trento, Italy More info
  • Short course on Advanced numerical methods for free surface hydrodynamics, 19-30 January 2015, Trento, Italy More info
  • 2nd Fluids in New Zealand Workshop (FiNZ 2014) 29-31 January 2014, Auckland Website
  • 2nd International Conference on Waste Water Discharges, September 16-20, 2002, Istanbul, Turkey.

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