Computational Fluid Dynamics Model for Tacoma Narrows Bridge Upgrade Project

Debus, Kristian; Berkoe, Jonathan; Rosendall, Brigette; Shakib, Farzin

doi:10.1115/fedsm2003-45514

Cited by 5 publications

(4 citation statements)

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“…This one equation model is based on the Reynolds Averaged Navier Stokes (RANS) assumption that the flow can be decomposed in the sum of a steady flow and turbulent perturbations. More refined turbulence models such as Large Eddy Simulation (LES) or Detached Eddy Simulation (DES), based on transient hypothesis and grid filtering are available and have been experimented by the authors [8] but given the large number of simulations to be carried out and available computer resources, it has been decided to retain the RANS model. Initially, no transition models were used and on a bulb study, the absolute drag difference remains fairly small between the two methods.…”

Section: Cfd Validationmentioning

confidence: 99%

“…2D and panel methods have been used with some success [9,24] but with the spread of supercomputers, solving the full 3D Navier Stokes equations using turbulence models has become possible [13,17]. The limitations of actual methods are the free surface, the wave formation [7] and the use of sophisticated turbulence models such as Large Eddy Simulation [8,25].…”

Section: Computational Fluid Dynamics (Cfd) Approachmentioning

confidence: 99%

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A hybrid numerical method to develop America’s Cup yacht appendages

Nicolopoulos¹,

Berton²,

Gouvernet³

et al. 2009

Sports Eng

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A method aimed at the development of an America's Cup racing yacht bulb is developed and validated against experimental data. The method relies heavily on Reynolds Averaged Navier Stokes computational fluid dynamics (CFD) and also factors in gravitational and aerodynamics effects through the use of a Velocity Prediction Program. Initial extensive use of towing tank results is made to be able to validate the CFD solution and thus develop a solid ground for predictive work. Then, in order to narrow down the focus on bulb developments, decoupled hypotheses are made on the influence of the hull and free surface wave. The development of a detailed performance analysis chart of a known base bulb allows the use of a relatively small series of CFD simulations together with physical hypotheses to assess any given bulb performance relative to the known base. The discussion of the results on a specific development highlights the promises and limitations of the method; final full scale results are discussed and analysed as well.

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Section: Cfd Validationmentioning

confidence: 99%

Section: Computational Fluid Dynamics (Cfd) Approachmentioning

confidence: 99%

A hybrid numerical method to develop America’s Cup yacht appendages

Nicolopoulos¹,

Berton²,

Gouvernet³

et al. 2009

Sports Eng

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“…The results for drag coefficients and Strouhal numbers were in excellent agreement for the square cylinder with a mean value close to 2.0 measured by Delany (1953). The details of these data may be found in Debus, et al (2003). Since the modeling of flow separation around square cylinders is more repeatable (and numerically more robust) than for circular cylinders, extrapolation to higher Reynolds numbers from the limited range of available data was done with greater confidence.…”

Section: Cfd Model Validationmentioning

confidence: 99%

CFD Analysis of Large Caisson Interaction With Current at Supercritical Reynolds Number

Chakrabarti¹,

Debus

Berkoe

et al. 2004

23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 1, Parts a and B

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The newly constructed Tacoma Narrows Bridge Piers represent large concrete floating caissons during their construction. For designing their mooring system the current force applied on the caissons in the Narrows must be known. The flow field around the caisson is highly complex and the calculation of the current load on the caisson by analytical means is difficult. On the other hand, model tests suffer from the distortion in the Reynolds number. Therefore, a two-prong approach was undertaken. Besides the fixed model test of the caissons for current forces, a CFD analysis of the flow around the caisson is chosen. A 3-D CFD approach is considered more appropriate than a 2-D one, since the bottom contour at the site is irregular and water depth is rather shallow. This paper discusses the CFD method and the results obtained from such analysis. The numerical analysis was carried out in both ebb and flood flow of the tidal current in the basin. One of the difficulties of the computational method is very high Reynolds number encountered by the large current and large size of the caisson. The analysis was performed in both model and full scales so that the difference in the results may be investigated. Also, since the model test data was available, comparisons could be made between the CFD and model test results on the drag and lift forces on the caisson.

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“…The role of the incidence angle on square cylinders have been investigated, with focus on the vortex shedding, using air flow at low Reynolds numbers (e.g., see Dutta et al, 2008;Yoon et al, 2010). Numerical modeling have been used to study the fluid dynamics around bridge piers, this allowing the analysis of additional characteristics, such as local pressures on the pier walls (Wang et al, 2015;Nasim et al, 2018) or vortex shedding induced by complex geometries, like tandem piers (Almasri and Moqbel, 2017;Debus et al, 2003).…”

Section: Introductionmentioning

confidence: 99%