A5049436207- Wave and Wind Energy Systems
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics Simulations and Interactions
- Coastal and Marine Dynamics
- Fluid Dynamics and Turbulent Flows
- Nuclear Engineering Thermal-Hydraulics
- Nuclear reactor physics and engineering
- Ocean Waves and Remote Sensing
- Aerodynamics and Acoustics in Jet Flows
- Nuclear Materials and Properties
- Membrane Separation Technologies
- Nanopore and Nanochannel Transport Studies
- Ship Hydrodynamics and Maneuverability
- Earthquake and Tsunami Effects
- Engineering Applied Research
- Drilling and Well Engineering
- Vibration and Dynamic Analysis
- Wind Energy Research and Development
- Heat Transfer and Optimization
- Membrane-based Ion Separation Techniques
- Tropical and Extratropical Cyclones Research
- Advanced Numerical Methods in Computational Mathematics
- Granular flow and fluidized beds
- Offshore Engineering and Technologies
- Analytical Chemistry and Sensors
Aalborg University
2020-2024
Hitachi Global Storage Technologies (United States)
2013
Studsvik (Sweden)
2001
We report new measurements of mixing passive temperature field in a turbulent flow. The use low helium gas allows us to span range microscale Reynolds number, R(lambda), from 100 650. exponents xi(n) the structure functions </straight theta(x+r)-straight theta(x)/(n)> approximately r(xi(n)) are shown saturate xi(infinity) 1.45+/-0.1 for highest orders, n 10. This saturation is signature statistics dominated by frontlike structures, cliffs. Statistics cliffs' characteristics performed,...
Abstract Accurate prediction of wave transformation is key in the design coastal and nearshore structures which typically depends on numerical models. Turbulent rotational effects call for use Computational Fluid Dynamics (CFD) solvers a large range formulations including free surface treatments exists. Physical flume tests propagation over submerged bar with various levels nonlinearity, regularity, wave-breaking, dedicated to model benchmarking or validation, were carried out Ocean Coastal...
Highly accurate and precise heave decay tests on a sphere with diameter of 300 mm were completed in meticulously designed test setup the wave basin Ocean Coastal Engineering Laboratory at Aalborg University, Denmark. The dedicated to providing rigorous benchmark dataset for numerical model validation. was ballasted half submergence, thereby floating waterline equator when rest calm water. Heave conducted, wherein held stationary dropped from three drop heights: small height, which can be...
Abstract Membrane fouling significantly reduces membrane permeability, leading to higher operational expenses. In situ monitoring of can potentially be used reduce operation cost by optimizing parameters and cleaning conditions. this study, a platinum wire with diameter 20 µm was attached the surface ceramic ultrafiltration membrane, measuring voltage across while applying an AC current, amplitude third harmonic wave, so-called 3ω signal, obtained. Results showed increasing signals during...
Wave excitation tests on a fixed sphere with the center at still water level were carried out three different physical wave basin setups. The completed as continued effort of working group OES Energy Converters Modelling Verification and Validation to increase confidence in numerical models energy converters by generation accurate benchmarks datasets for model validation. An idealized testcase be used was formulated. investigated setups included: 1) six degree-of-freedom load cell mounted...
In ocean engineering, accurate and efficient numerical simulations are crucial. Leveraging axisymmetry vastly enhances the efficiency of a simulation, reducing three-dimensional scenario to two-dimensional simulation. Exploiting enables significant reduction in computational demand while maintaining simulation fidelity. this paper, is leveraged perform large ensemble simulations, order evaluate maximise accuracy Computational Fluid Dynamics (CFD) particular, free decay motion wave radiation...
Simulating the free decay motion and wave radiation from a heaving semi-submerged sphere poses significant computational challenges due to its three-dimensional complexity. By leveraging axisymmetry, we reduce problem two-dimensional simulation, significantly decreasing demands while maintaining accuracy. In this paper, exploit axisymmetry perform large ensemble of Computational Fluid Dynamics (CFDs) simulations, aiming evaluate maximize both accuracy efficiency, using Reynolds Averaged...
The design of large diameter monopiles (8–10 m) at intermediate to deep waters is largely driven by the fatigue limit state and mainly due wave loads. scope present paper assess mitigation loads on a monopile perforation shell. consists elliptical holes in vicinity splash zone. Wave are estimated for both regular irregular waves through physical model tests flume. test matrix includes with Keulegan–Carpenter ( K C ) numbers range 0.25 10 covers ultimate states. Load reductions order 6%–20%...
Abstract A platinum wire with a diameter of 20 µm and length 14 mm was attached to the surface ceramic membrane for in situ fouling monitoring. By measuring voltage across while applying an AC current, amplitude third harmonic wave, so-called 3ω signal, which is inversely proportional thermal conductivity around wire, obtained. It demonstrated that signal influenced by changing environment as result differences heat convection. Measurements signals on covered varying amounts acrylic varnish...
With increasing demand for renewable energy resources, the development of alternative concepts is still ongoing. The wave sector in vast develop- ment on way to contribute production world wide. present study presents Exowave converter made so far. A numerical model has been established supported by flume tests performed at Aalborg University during first phase development. Furthermore, a successful open sea demonstration 7 meters water Blue Accelerator, Belgium, from which concept proven....