Håkan Nilsson
Håkan Nilsson is a Professor in Fluid Dynamics. He develops, validates and uses an open source code for numerical studies of fluid dynamics in a wide range of applications. His main application area is hydropower, where he is studying the flow and cavitation in the turbines and the cooling air flow in the generators. When there is need for special experimental studies, Håkan collaborates with experts in such methods.
Showing 162 publications
Towards practical applications of deep reinforcement learning in computational fluid dynamics
Hardware-in-the-loop emulator test-setup for a dual-rotor contra-rotating pump-turbine
Modal analysis of vortex rope using dynamic mode decomposition
Physics-Informed Neural Networks for Modeling Linear Waves
A semi-implicit slip algorithm for mesh deformation in complex geometries, implemented in OpenFOAM
Grid-scale pumped hydro energy storage for the low countries
Cavitation Simulations of a Low Head Contra-rotating Pump-turbine
Implementation of deep reinforcement learning in OpenFOAM for active flow control
A Head Loss Pressure Boundary Condition for Hydraulic Systems
Evaluation of startup time for a model contra-rotating pump-turbine in pump-mode
Scale-resolving simulations of the flow in the Francis-99 turbine at part-load condition
System model development and numerical simulation of low-head pumped hydro storage
Development of blade element momentum (BEM) method for hydropower
Evolution of flow features during transient operation of a Kaplan turbine
Large-eddy Simulation of Cavitating Tip Leakage Vortex
A Low-Head Counter-Rotating Pump-Turbine at Unsteady Conditions
Numerical Simulation of Hydraulic Turbine During Transient Operation Using OpenFOAM
Numerical analysis of an initial design of a counter-rotating pump-turbine
Modelling Deep Green tidal power plant using large eddy simulations and the actuator line method
An in-depth numerical analysis of transient flow field in a Francis turbine during shutdown
FLUID-STRUCTURE INTERACTION ON A FIXED FAN BLADE
Development of a novel numerical framework in OpenFOAM to simulate Kaplan turbine transients
OpenFOAM for Francis turbine transients
Numerical Simulation of Hydraulic Turbine During Transient Operation Using OpenFOAM
The Contribution of Low-Head Pumped Hydro Storage to a successful Energy Transition
Optimized initial down-scaled model design of SD-CRPT (D2.1, ALPHEUS)
Optimized initial down-scaled model design of RD-CRPT (ALPHEUS, D2.2)
Simulation of a shut-down transient in the Francis-99 turbine model
Tidal power plant simulations using large eddy simulation (LES) and the actuator line method (ALM)
Simulation of Fluid-Structure Interaction in Biomechanics Using FOAM-Extend
Estimating air-water gas transfer velocity during low wind condition with and without buoyancy
LES and Actuator Line Method for Modeling the Tidal Power Plant Deep Green, Using OpenFOAM
LES OF TRANSIENTS IN THE FRANCIS-99 WATER TURBINE MODEL
Air bubble release and flow-induced forces in stent grafts
Active flow control of the vortex rope and pressure pulsations in a swirl generator
Large eddy simulation of the tidal power plant Deep Green using the actuator line method
1D-3D coupling for hydraulic system transient simulations
Particle-level simulations of flocculation in a fiber suspension flowing through a diffuser
A physically based model for thermal plasma arc attachment on a W-ThO2 cathode
Surface shear stress dependence of gas transfer velocity parameterizations using DNS
Near-surface physics during convection affecting air-water gas transfer
An evaluation of gas transfer velocity parameterizations during natural convection using DNS
Displacement Forces in Stent Grafts: Influence of Diameter Variation and Curvature Asymmetry
Effect of cathode model on arc attachment for short high-intensity arc on a refractory cathode
A predictive model for gas tungsten arc heat source
Air bubbles are released by thoracic endograft deployment: An in vitro experimental study
Swirling flow in a conical diffuser generated with rotor-stator interaction
Ballistic deflection of fibres in decelerating flow
VENTILATION AIR FLOW FIELD CHARACTERISTICS IN A HYDRO GENERATOR Model
LES and DES of Strongly Swirling Turbulent Flow through a Suddenly Expanding Circular Pipe
Large Eddy Simulation and Laser Doppler Velocimetry on a vortex flow meter model
Simulation of Water Level Fluctuations in a Hydraulic System Using a Coupled Liquid-Gas Model
LES and DES of swirling flow with rotor-stator interaction
Time-accurate Numerical Simulations of Swirling Flow with Rotor-stator Interaction
Exploration of rotation/curvature correction method in hydropower application
A fully synthetic turbulent boundary condition with a homogeneous vortex distribution
Active Flow Control of Vortex Rope in a Conical Diffuser
Numerical Modelling of Blood Pressure Pulses in Vertebral Canal during Whiplash Motion
Velocity and pressure fluctuations induced by the precessing helical vortex in a conical diffuser
Flow of cooling air in an electric generator model - An experimental and numerical study
MODELLING OF ELECTRODE-ARC COUPLING IN ELECTRIC ARC WELDING
Evaluation of an improved mixing plane interface for OpenFOAM
Rheological properties of dilute suspensions of rigid and flexible fibers
Experimental and numerical investigation of hydro power generator ventilation
Numerical investigation of fiber flocculation in the air flow of an asymmetric diffuser
Unsteady numerical simulation of the flow in the U9 Kaplan turbine model
Advanced numerical prediction of strongly swirling turbulent flows
A study of a flexible fiber model and its behavior in DNS of turbulent channel flow
Description and validation of a flexible fiber model, implemented in a general-purpose CFD code
Numerical Investigations of Unsteady Flow in a Centrifugal Pump with a Vaned Diffuser
Mathematical, numerical and experimental analysis of the swirling flow at a Kaplan runner outlet
Numerical modelling of shielding gas flow and heat transfer in laser welding process
EXPERIMENTAL AND NUMERICAL STUDY OF COOLING AIR FLOW IN A HYDROELECTRIC GENERATOR
On the choice of electromagnetic model for short high-intensity arcs, applied to welding
Transient and steady-state air flow simulations in generators using OpenFOAM
A PIV Study of The Cooling Air Flow in An Electric Generator Model
PIV Measurement of Air Flow in a Hydro Power Generator Model
Numerical simulation of Ar-x%CO2 shielding gas and its effect on an electric welding arc
A PARAMETRIC STUDY OF THE AIR FLOW IN AN ELECTRIC GENERATOR THROUGH STEPWISE GEOMETRY MODIFICATIONS
Procedure for the break-up of cavitation sheet
Unsteady Simulations of the Flow in a Swirl Generator, using OpenFOAM
EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE COOLING AIR FLOW IN AN ELECTRIC GENERATOR
Modeling and simulation of a heat source in electric arc welding
A swirl generator case study for OpenFOAM
Simulation of Venous Plexus Blood Flow during Rapid Spinal Bending
CFD of Air Flow in Hydro Power Generators for Convective Cooling, using OpenFOAM
Mass transfer cavitation model with variable density of nuclei
Comparison of numerical and experimental results of the flow in the U9 Kaplan turbine model
The ERCOFTAC centrifugal pump OpenFOAM case-study
Numerical Estimation of Torsional Dynamic Coefficients of a Hydraulic Turbine
The flow in the U9 Kaplan turbine - preliminary and planned simulations using CFX and OpenFOAM
Some experiences on the accuracy and parallel efficiency of OpenFOAM for CFD in water turbines
Experiences with OpenFOAM for water turbine applications
An Adaptive Turbulence Model for Swirling Flow
Evaluation of OpenFOAM for CFD of turbulent flow in water turbines
Large Eddy Simulation of Turbulent Swirling Flow Through a Sudden Expansion
Very Large Eddy Simulations of Draft Tube Flow
OpenFOAM SIMULATION OF THE FLOW IN THE HöLLEFORSEN DRAFT TUBE MODEL
Numerical Investigations of Swirling flow in a Conical Diffuser
Temporally fluctuating prey and coexistence among unequal conspecific interferers
Assessment of turbulence modelling for CFD simulations into hydroturbines: spiral casings
Validations of CFD against detailed velocity and pressure measurements in water turbine runner flow
Parallel multiblock CFD computations applied to industrial cases
A numerical investigation of tip clearance flow in Kaplan water turbines
A numerical investigation of the turbulent flow in a Kaplan water turbine runner
CALC-PVM: A Parallel SIMPLEC Multiblock Solver for Turbulent Flow in Complex Domains
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Showing 14 research projects
Hydropower operation and lifetime analysis
Artificial intelligence for enhanced hydraulic turbine lifetime
PINNs -- Multi-Fidelity Physics-Informed Neural Network to Solve Partial Differential Equations
The BEM-method for fast simulations of transients in hydropower
Machine learning for optimization of pump operation under transients in hydraulic turbine rigs
Unsteady flow and cavitation during off-design and transients in water turbines
Augmenting grid stability through Low-head Pumped Hydro Energy Utilization & Storage (ALPHEUS)
Flow-induced vibrations and failure of axial fan blades in electric generators
Flow in turbines during new operating procedures
Drakens väg - Optimering av strömkraftverk i havet
1D system transients coupled with 3D local flow details
Experimental and numerical investigations of cooling air flow in hydro power electric generators
Värmeöverföringsmätningar i skalmodell av elgenerator
Unsteady incompressible flow in rotating machinery