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Articles 1 - 9 of 9
Full-Text Articles in Architectural Engineering
On The Computational Efficiency Of Les And Hybrid Rans-Les Models In Building Aerodynamics, Aly Mousaad Aly, Faiaz Khaled
On The Computational Efficiency Of Les And Hybrid Rans-Les Models In Building Aerodynamics, Aly Mousaad Aly, Faiaz Khaled
Faculty Publications
Large-eddy simulation (LES) has proven to offer superior accuracy in regards to predicting surface pressures compared to the Reynolds-averaged Navier Stokes (RANS) models. However, the primary impediment is the high computational cost associated with LES. The authors attempt to investigate the computational cost and accuracy by employing different sub-grid scale (SGS) models in LES and hybrid RANS-LES models. One of the prerequisites of accurate pressure estimations is to ensure a horizontally homogeneous empty computational domain. This study aims to compare the computational competence qualitatively and quantitatively using an empty domain in regards to the ability to maintain horizontal homogeneity. The …
On The Computational Efficiency Of Les And Hybrid Rans-Les Models In Building Aerodynamics, Faiaz Khaled, Aly Mousaad Aly
On The Computational Efficiency Of Les And Hybrid Rans-Les Models In Building Aerodynamics, Faiaz Khaled, Aly Mousaad Aly
Faculty Publications
No abstract provided.
Peak Pressures On Low Rise Buildings: Cfd With Les Versus Full Scale And Wind Tunnel Measurements, Aly Mousaad Aly, Hamzeh Gol-Zaroudi
Peak Pressures On Low Rise Buildings: Cfd With Les Versus Full Scale And Wind Tunnel Measurements, Aly Mousaad Aly, Hamzeh Gol-Zaroudi
Faculty Publications
This paper focuses on the processes of wind flow in the atmospheric boundary layer, to produce realistic full-scale pressures for the design of low-rise buildings. CFD with LES turbulence closure is implemented on a scale 1:1 prototype building. A proximity study was executed computationally in CFD with LES that suggests new recommendations on the computational domain size, in front of a building model, apart from common RANS-based guidelines (e.g. COST and AIJ). Our findings suggest a location of the test building, different from existing guidelines, and the inflow boundary proximity influences pressure correlation and reproduction of peak loads. The CFD …
Best Practices For Wake Model And Optimization Algorithm Selection In Wind Farm Layout Optimization, Nicholas F. Baker, Andrew P.J. Stanley, Jared J. Thomas, Andrew Ning, Katherine Dykes
Best Practices For Wake Model And Optimization Algorithm Selection In Wind Farm Layout Optimization, Nicholas F. Baker, Andrew P.J. Stanley, Jared J. Thomas, Andrew Ning, Katherine Dykes
Faculty Publications
This paper presents the results of two case studies regarding the wind farm layout optimization problem. We asked members of the computational optimization and wind communities to take part in the studies that we designed. Nine individuals participated. Case study 1 considered variations in optimization strategies for a given simple Gaussian wake model. Participants were provided with a wake model that outputs annual energy production (AEP) for an input set of wind turbine locations. Participants used an optimization method of their choosing to find an optimal wind farm layout. Case study 2 looked at trade-offs in performance resulting from variation …
Comparison Of Wind Farm Layout Optimization Results Using A Simple Wake Model And Gradient-Based Optimization To Large-Eddy Simulations, Jared J. Thomas, Jennifer Annoni, Paul Fleming, Andrew Ning
Comparison Of Wind Farm Layout Optimization Results Using A Simple Wake Model And Gradient-Based Optimization To Large-Eddy Simulations, Jared J. Thomas, Jennifer Annoni, Paul Fleming, Andrew Ning
Faculty Publications
The models used during wind farm layout optimization use simplifying assumptions that can alter the design space. Some characteristics of the simple models may negatively influence the resulting layouts. In this paper, we perform wind farm layout optimization using a simple wake model and compare the resulting improvements to large-eddy simulation (LES) results to confirm that the layout was actually improved. We begin by describing the models used, including changes specific for use with gradient-based optimization. We then compare our models’ output to previously published model and LES results. Using the models described, we performed gradient-based wind farm layout optimization …
Plastic Fantastic: The Fiberglass Boatbuilding Industry In Holland, Michigan, Geoffrey D. Reynolds
Plastic Fantastic: The Fiberglass Boatbuilding Industry In Holland, Michigan, Geoffrey D. Reynolds
Faculty Publications
Plastic Fantastic: The Fiberglass Boatbuilding Industry in Holland, Michigan is a chapter concerning the use of fiberglass reinforced plastic (FRP) to build boats starting in the 1940s. In the 1950s boat builders discovered that fiberglass would allow them to design boats that would lead to new boat sales and increased profit margins for years to come. This technology steadily spread throughout American boat manufacturing plants, including Holland, Michigan, placing the town among the leaders in the industry.
Wind Loading On Trees Integrated With A Building Envelope, Aly Mousaad Aly, Alberto Zasso, Girma Bitsuamlak, Alberto Nicola Longarini, Arindam Gam Chowdhury
Wind Loading On Trees Integrated With A Building Envelope, Aly Mousaad Aly, Alberto Zasso, Girma Bitsuamlak, Alberto Nicola Longarini, Arindam Gam Chowdhury
Faculty Publications
With the sustainability movement, vegetated building envelopes are gaining more popularity. This requires special wind effect investigations, both from sustainability and resiliency perspectives. The current paper focuses on wind load estimation on small- and full-scale trees used as part of green roofs and balconies. Small-scale wind load assessment was carried out using wind tunnel testing in a global-effect study to understand the interference effects from surrounding structures. Full-scale trees were investigated at a large open-jet facility in a local-effect study to investigate the wind-tree interaction. The effect of Reynolds number combined with shape change on the overall loads measured at …
Following Industry's Leed : Municipal Adoption Of Private Green Building Standards, Sarah B. Schindler
Following Industry's Leed : Municipal Adoption Of Private Green Building Standards, Sarah B. Schindler
Faculty Publications
Local governments are beginning to require new, privately constructed and funded buildings to be “green” buildings. Instead of creating their own, locally-derived definitions of green buildings, many municipalities are adopting an existing private standard created by members of the building industry: LEED (Leadership in Energy and Environmental Design). This Article explains and assesses the privately promulgated LEED standards. It argues that the translation of LEED standards, which were intended to be voluntary, into law raises several theoretical and practical problems. Specifically, private green building ordinances that rely on LEED do not ensure a reduction in the negative local environmental impacts …
Optimal Width And Depth For Maximum Breaking Load Of Wood Beams, Steven H. Bullard, Vikram Yadama
Optimal Width And Depth For Maximum Breaking Load Of Wood Beams, Steven H. Bullard, Vikram Yadama
Faculty Publications
The strength of solid wood beams is an important property to consider in construction. Such beams do not receive further primary processing after leaving the sawmill, and their quality and strength properties are therefore determined by their initial, primary breakdown at the sawmill. The most efficient means of controlling the quality of solid wood beams is thus at the sawmill level. This paper presents a method of determining the width and depth of solid beams that will maximize breaking load.