What we do?

We develop computational tools, methods, and algorithms and improve their reliability, efficiency, and flexibility to study complex problems in hydosystems (rivers, lakes, estuaries, hydraulic structure, etc.). Our special focus is on multi-physics hydro-environmental flows, where water interacts with air, sediments, ice, and many other natural and artificial substances. Besides, we work on the extreme flow conditions that occur e.g. during floods, tsunamis, storm surges, and debris avalanches. The overall goal of our works is to further our understanding of such complex flow systems through a combination of mathematical modelling, theoretical analysis, and experimental/ field measurements. Ultimately, such understanding will help mitigate the impact of water-related hazards on human lives and infrastructure, optimize engineering designs, and protect aquatic environments in the years to come.

Research domains

  • Environmental Hydraulics

  • Computational Fluid Mechanics and hydraulics 

  • Multiphase Flows 

  • Granular flow and sediment dynamics

  • Fluvial and Coastal Mechanics 

  • Cold-region hydraulics

Current Project Themes

Multiphysics Numerics

High-performance and robust mesh-free particle methods for multiphase and interfacial flows

Fluvial mechanics

Hydrodynamics and transport processes in river systems and climate change impact

Granular flows

Multiphase granular flows (sub-aerial and submerged) and sediment dynamics

Ice mechanics

Dynamics of river ice transport, interaction, and jamming

Multiphysics Numerics

Our projects in this theme involve the development, enhancement, and implementation of mesh-free particle methods, esp. MPS (Moving Particle Semi-implicit) and SPH (smoothed Particle Hydrodynamics), and DEM (Discrete Element Method), for high-performance simulation of complex multiphase and free surface flow problems. Due to the ability of particle methods in dealing with large interfacial deformations/fragmentations, these methods are expected to be a serious alternative for conventional mesh-based numerical methods in many environmental, geophysical, and engineering applications. Our projects primarily focus on (1) convergence, stability, and accuracy, (2) Performance and efficiency, (3) Applicability for multiphysics problems, and (4) Engineering applications:

An enhanced WC-MPS method with improved stability and accuracy
Computational performance and efficiency of particle methods
Particle methods for open-channel flows                
MPS for multiphase jet of sand in water
FI-SPH and FI-MPS for multiphase flows (case of R-T instability)
Particle methods for two-phase dam-break

Example Publications:

Fluvial Mechanics

Our projects in this theme are on the study of hydrodynamics, sediment transport, water quality, ice dynamics, and climate change impacts in fluvial environments. They use numerical modelling in combination with experimental and theoretical analysis to provide a better understanding of the relevant physical phenomena. Such understanding is an essential element in the efficient design of fluvial infrastructure, sustainable management of rivers and estuaries, and prevention and mitigation of related hazards (e.g., floods).

Recent Projects:

Modelling hydrodynamic & transport processes (case: Athabasca River)
Modelling sediment and contaminant transport (Case: Athabasca River)
3D modelling of river hydrodynamics and transport processes
2D hydrodynamic and water quality modelling (case: Ottawa River)
Numerical study of river confluence morphodynamics
Water quality modelling in cold-region rivers

Example Publications:

Granular flows and sediment dynamics

The flow of granular materials plays a critical role in industrial, geophysical, and environmental processes for example in sediment transport, landslides, debris flow, mining processes, and lunar and Martian surface processes. Our projects in this theme focus on the development of multiphase granular flow models based on the mesh-free continuum (e.g., MPS and SPH) and discrete (e.g. DEM) numerical models. Our numerical works are also supported by some complementary experimentation.

Recent Projects:

Continuum-based mesh-free particle modelling of immersed granular flows
Mesh-free particle modelling of sub-aerial and submerged granular slides
Mesh-free particle modelling of flow-driven granular flows and sediment transport
Experimental bench-marking of gravity-driven sub-aerial and submerged granular flows
Eulerian & Lagangian models for non-Newtonian flow of mining tailing (in an event of dam breach)
CFD-DEM modelling of submerged granular flows

Example Publications:

Ice mechanics and cold-regions hydraulics

Ice processes (e.g. ice formation and breakup and transport), play a curtail role in hydrodynamic, morphodynamic, sediment/contaminant transport, and water quality of cold region rivers. They can be the source of the most devastating floods. The goal of our researches in this area is to provide a better understanding of river ice processes (especially the dynamic of river ice), the effects on fluvial processes, and also to develop new tools and techniques to facilitate such understanding.

Recent Projects:

Continuum-based (2D & 3D) modelling of river ice dynamics
Fully Lagrangian discrete-based modelling of ice dynamics
1D modelling of river ice processes their impact on hydrodynamics and transport regimes
Ice flow estimation from space (using satellite imagery data) for validation of numerical models

Example Publications: