Turbulence model choice for the calculation of drag forces when using the CFD method

Zaïdi, Hanane; Fohanno, S.; Taı̈ar, Redha; Polidori, Guillaume

doi:10.1016/j.jbiomech.2009.10.010

Cited by 49 publications

(50 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aerodynamic drag can be investigated by field tests, wind-tunnel measurements and numerical simulation by Computational Fluid Dynamics (CFD). In recent years, several publications have reported detailed CFD simulations in cycling [5][6][7][8][9] and other sport disciplines [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

CFD simulations of the aerodynamic drag of two drafting cyclists

Blocken

Defraeye

Koninckx³

et al. 2013

Computers & Fluids

136

102

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

CFD simulations of the aerodynamic drag of two drafting cyclists

Blocken

Defraeye

Koninckx³

et al. 2013

Computers & Fluids

136

102

View full text Add to dashboard Cite

“…A wall function approach resolves this issue to some extent, without incurring added mesh generation and computational time. In the present work, non-equilibrium wall function approach is employed for which the initial mesh should have wall y+ in the range of 30 to 60 [18]. y+ distribution on the canard and the wing of the configuration under discussion are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect of Side Wind on the Directional Stability and Aerodynamics of a Hybrid Buoyant Aircraft

Haque

Asrar

Omar

et al. 2016

MATEC Web of Conferences

View full text Add to dashboard Cite

Abstract. Directional stability characteristics explain the capabilities of a hybrid buoyant aircraft's performance against the side wind, which induces flow separation that is chaotic in nature and may lead to oscillations of the aerodynamic surfaces. A numerical study is carried out to estimate the effect of side wind. The boundary conditions for the computational domain are set to velocity inlet and pressure outlet. Due to the incompressible flow at the cruise velocity, the density is taken to be constant. For these steady state simulations, the time is discretized in first order implicit and the SIMPLE scheme is employed for pressure velocity coupling alongwith k-ω SST model. Based on the results obtained so far, it is concluded that voluminous hybrid lifting fuselage is the major cause of directional.

show abstract

“…The k-omega-SST [8] model was chosen due to its capabilities to capture the vortex structures developing in the wake region and its superior performances in highly separated flows [9,10].…”

Section: Numerical Setupmentioning

confidence: 99%

CFD for Surfboards: Comparison between Three Different Designs in Static and Maneuvering Conditions

Oggiano

Pierella

2018

The 12th Conference of the International Sports Engineering Association

View full text Add to dashboard Cite

The present paper aims to show the potential of Computational Fluid Dynamics (CFD) solvers for surfboard design and its applicability by comparing three different surfboards with minimal changes in design. In fact, surfboard manufacturing routines are moving towards more controlled and reproducible manufacturing processes, in particular Computer numerically controlled (CNC) shaping techniques. As a consequence, three dimensional (3D) computer models of the boards start to be available, and can be imported in Computational Fluid Dynamics (CFD) programs. This opens up a new design methodology, where the performances of the different shapes can be studied and quantitatively evaluated, highlighting details that would be otherwise impossible to identify from a field test. The commercial CFD code STAR-CCM+ is used in the present work to compare the performance of three different surfboards, with different curvature at the bottom and different tail shapes. In the simulations, an Unsteady Reynolds Navier Stokes (URANS) approach is used, with the volume of fluid (VOF) method as free surface discretization method and the k-omega-SST turbulence model as numerical closure of the RANS equations. CFD proved to be a valid tool to compare the performances of the different shapes, bringing into light subtle but important differences between the designs. In particular, the static simulations showed that the rocker affects the performances by increasing the lift but also the drag of the board, also generating higher forces in maneuvering conditions. On the other hand, the tail shape did not affect the performances of the board in the analyzed cases.

show abstract

Turbulence model choice for the calculation of drag forces when using the CFD method

Cited by 49 publications

References 15 publications

CFD simulations of the aerodynamic drag of two drafting cyclists

CFD simulations of the aerodynamic drag of two drafting cyclists

Effect of Side Wind on the Directional Stability and Aerodynamics of a Hybrid Buoyant Aircraft

CFD for Surfboards: Comparison between Three Different Designs in Static and Maneuvering Conditions

Contact Info

Product

Resources

About