Field testing and CFD LES simulation of offshore wind flows over coastal dune terrain in Northern Ireland

Meiring Beyers, Derek Jackson, Kevin Lynch, Andrew Cooper, Andreas Baas, Irene Delgado-Fernandez, Pierre Olivier Dallaire

Research output: Contribution to journalConference proceeding article (ISSN)

Abstract

The role of offshore-directed winds in aeolian sand transport over and along coastal dune systems is studied under a project funded through the UK’s Natural Environment Research Council (NERC) “Responsive Mode Program”. The field study area is a 6km beach located at Magilligan Strand, Northern Ireland. The coastline has a northeastern-facing orientation on the margin of the Atlantic Ocean and forms the seaward edge of a large vegetated Holocene (5-6000 yrs BP) cuspate foreland. Landward of the beach/foredune crest, a series of 15-20m high vegetated dune ridges are located parallel to the shore. A component of this research program is the measurement of the wind flows over and across the dune and beach terrain and comparison with Computational Fluid Dynamic simulation results Detailed wind flow measurements were obtained during field testing in September 2009 using an extensive array of mast mounted three-dimensional ultrasonic anemometers. Large Eddy Simulation (LES) was performed of the wind flow over the terrain using the open-source CFD software OpenFOAM. The computational domain and mesh includes the terrain obtained by high resolution LIDAR measurements with localized mesh refinement near the complex terrain. The paper illustrates the comparison between the measured and simulated wind flow characteristics. The discussion also includes early commentary on how the new insights into the windflow characteristic inform study of the evolution of coastal dune geomorphology.

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large eddy simulation
dune
beach
simulation
anemometer
complex terrain
flow measurement
computational fluid dynamics
research program
geomorphology
Holocene
software
sand
coast
ocean
comparison

Cite this

@article{78b42d713dea4e409e43d0a84a3768fc,
title = "Field testing and CFD LES simulation of offshore wind flows over coastal dune terrain in Northern Ireland",
abstract = "The role of offshore-directed winds in aeolian sand transport over and along coastal dune systems is studied under a project funded through the UK’s Natural Environment Research Council (NERC) “Responsive Mode Program”. The field study area is a 6km beach located at Magilligan Strand, Northern Ireland. The coastline has a northeastern-facing orientation on the margin of the Atlantic Ocean and forms the seaward edge of a large vegetated Holocene (5-6000 yrs BP) cuspate foreland. Landward of the beach/foredune crest, a series of 15-20m high vegetated dune ridges are located parallel to the shore. A component of this research program is the measurement of the wind flows over and across the dune and beach terrain and comparison with Computational Fluid Dynamic simulation results Detailed wind flow measurements were obtained during field testing in September 2009 using an extensive array of mast mounted three-dimensional ultrasonic anemometers. Large Eddy Simulation (LES) was performed of the wind flow over the terrain using the open-source CFD software OpenFOAM. The computational domain and mesh includes the terrain obtained by high resolution LIDAR measurements with localized mesh refinement near the complex terrain. The paper illustrates the comparison between the measured and simulated wind flow characteristics. The discussion also includes early commentary on how the new insights into the windflow characteristic inform study of the evolution of coastal dune geomorphology.",
author = "Meiring Beyers and Derek Jackson and Kevin Lynch and Andrew Cooper and Andreas Baas and Irene Delgado-Fernandez and Dallaire, {Pierre Olivier}",
year = "2010",
language = "English",
journal = "Proceedings of the Fifth International Symposium on Computational Wind Engineering (CWE2010), 23-27 May, Chapel Hill, North Carolina, US",

}

Field testing and CFD LES simulation of offshore wind flows over coastal dune terrain in Northern Ireland. / Beyers, Meiring; Jackson, Derek; Lynch, Kevin; Cooper, Andrew; Baas, Andreas; Delgado-Fernandez, Irene; Dallaire, Pierre Olivier.

In: Proceedings of the Fifth International Symposium on Computational Wind Engineering (CWE2010), 23-27 May, Chapel Hill, North Carolina, US, 2010.

Research output: Contribution to journalConference proceeding article (ISSN)

TY - JOUR

T1 - Field testing and CFD LES simulation of offshore wind flows over coastal dune terrain in Northern Ireland

AU - Beyers, Meiring

AU - Jackson, Derek

AU - Lynch, Kevin

AU - Cooper, Andrew

AU - Baas, Andreas

AU - Delgado-Fernandez, Irene

AU - Dallaire, Pierre Olivier

PY - 2010

Y1 - 2010

N2 - The role of offshore-directed winds in aeolian sand transport over and along coastal dune systems is studied under a project funded through the UK’s Natural Environment Research Council (NERC) “Responsive Mode Program”. The field study area is a 6km beach located at Magilligan Strand, Northern Ireland. The coastline has a northeastern-facing orientation on the margin of the Atlantic Ocean and forms the seaward edge of a large vegetated Holocene (5-6000 yrs BP) cuspate foreland. Landward of the beach/foredune crest, a series of 15-20m high vegetated dune ridges are located parallel to the shore. A component of this research program is the measurement of the wind flows over and across the dune and beach terrain and comparison with Computational Fluid Dynamic simulation results Detailed wind flow measurements were obtained during field testing in September 2009 using an extensive array of mast mounted three-dimensional ultrasonic anemometers. Large Eddy Simulation (LES) was performed of the wind flow over the terrain using the open-source CFD software OpenFOAM. The computational domain and mesh includes the terrain obtained by high resolution LIDAR measurements with localized mesh refinement near the complex terrain. The paper illustrates the comparison between the measured and simulated wind flow characteristics. The discussion also includes early commentary on how the new insights into the windflow characteristic inform study of the evolution of coastal dune geomorphology.

AB - The role of offshore-directed winds in aeolian sand transport over and along coastal dune systems is studied under a project funded through the UK’s Natural Environment Research Council (NERC) “Responsive Mode Program”. The field study area is a 6km beach located at Magilligan Strand, Northern Ireland. The coastline has a northeastern-facing orientation on the margin of the Atlantic Ocean and forms the seaward edge of a large vegetated Holocene (5-6000 yrs BP) cuspate foreland. Landward of the beach/foredune crest, a series of 15-20m high vegetated dune ridges are located parallel to the shore. A component of this research program is the measurement of the wind flows over and across the dune and beach terrain and comparison with Computational Fluid Dynamic simulation results Detailed wind flow measurements were obtained during field testing in September 2009 using an extensive array of mast mounted three-dimensional ultrasonic anemometers. Large Eddy Simulation (LES) was performed of the wind flow over the terrain using the open-source CFD software OpenFOAM. The computational domain and mesh includes the terrain obtained by high resolution LIDAR measurements with localized mesh refinement near the complex terrain. The paper illustrates the comparison between the measured and simulated wind flow characteristics. The discussion also includes early commentary on how the new insights into the windflow characteristic inform study of the evolution of coastal dune geomorphology.

UR - http://www.cwe2010.org/index.html

M3 - Conference proceeding article (ISSN)

JO - Proceedings of the Fifth International Symposium on Computational Wind Engineering (CWE2010), 23-27 May, Chapel Hill, North Carolina, US

JF - Proceedings of the Fifth International Symposium on Computational Wind Engineering (CWE2010), 23-27 May, Chapel Hill, North Carolina, US

ER -