Several Cases for the Validation of Turbulence Models Implementation

Polewski, Michael D.; Cizmas, Paul G. A.

doi:10.3390/app11083377

Cited by 3 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study case [2], two turbulence models-the shear stress transport (SST) model and the Spalart-Allmaras (SA) model-were implemented in the UNS3D in-house code at the Texas A&M University, and their results were compared with those of FUN3D and CFL3D codes developed by NASA. The UNS3D code has two versions: UNS3D-SEQ (sequential version) and UNS3D-PAR (parallel version).…”

Section: Study Case-comparison Between Cfd and Experimental Results U...mentioning

confidence: 99%

“…In the first group, focused on the aerodynamics or computational fluid dynamics (CFD) areas or research, two articles were published on the following: the first covered aerodynamics analyses applications on the droop nose leading edge (DNLE) with the morphing trailing edge (MTE) combination for the UAS-S45 morphing wing [1]; the second was focused on the following four different configurations: a flat plate, an airfoil nearwake, a backward-facing step, and a turbine cascade, also called the eleventh standard configuration [2]. These aerodynamic studies were performed using various CFD in-house and commercial software, and their results were validated with experimental data provided in the literature.…”

Section: Summary Of the Special Issue Contentsmentioning

confidence: 99%

See 1 more Smart Citation

Editorial for the Special Issue “Aircraft Modeling and Simulation”

Botez

2022

Applied Sciences

View full text Add to dashboard Cite

show abstract

Section: Study Case-comparison Between Cfd and Experimental Results U...mentioning

confidence: 99%

Section: Summary Of the Special Issue Contentsmentioning

confidence: 99%

Editorial for the Special Issue “Aircraft Modeling and Simulation”

Botez

2022

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…More recent studies are those of Armaly et al [8], Kasagi and Matsunaga [9], and Beaudoin et al [10]. Relatively new studies were recently performed by Liakos and Malamataris [11], Buckingham [12], Chen et al [13], Polewski and Cizmas [14], and Pont-Vilchez et al [15]. Many of the previous studies were focused on the heat transfer behind the BFS expansion that might include natural or mixed convection cases [16].…”

Section: Introductionmentioning

confidence: 99%

Turbulent Flow over Confined Backward-Facing Step: PIV vs. DNS

et al. 2021

View full text Add to dashboard Cite

Particle Image Velocimetry measurements of the liquid velocity fields in the flow over the backward-facing step were performed in the same flow configuration as in the existing Direct Numerical Simulation (DNS). The experiment and the simulation were performed in an identical cross-section geometry with step expansion rate 2.25 and the square shape of the outlet duct at the Reynolds number in an inlet part of the section 7100. The experiment was performed in transparent test section, 1.2 m long, with 20 × 45 mm2 cross-section upstream and 45 × 45 mm2 downstream, while a domain that was three times shorter was used in the DNS. A 2D-2C PIV system with a single high-speed camera and a pulse laser was used for a series of two-dimensional measurements of the velocity field at several cross-sections from two different perspectives. Variables analyzed in the experiment are time-averaged fluid velocities, velocity RMS fluctuations and two components of the Reynolds stress tensor. The key novelty is the comparison of two very accurate approaches, PIV and DNS, in the same cross-section geometry. Comparison of the similarities, and especially the differences between the two approaches, elucidates uncertainties of both studies and answers the question on what kind of agreement is expected when two very accurate approaches are compared.

show abstract

A new boundary layer integral method based on the universal velocity profile

2022

View full text Add to dashboard Cite

A recently developed mixing length model of the turbulent shearing stress in wall bounded flows has been used to formulate a universal velocity profile (UVP) that provides an effective replacement for the widely used Coles wall-wake formulation. Comparisons with both direct numerical simulation and experimental data demonstrate the ability of the profile to approximate a wide variety of wall-bounded flows. The UVP is uniformly valid from the wall to the boundary layer edge and for all Reynolds numbers from zero to infinity. There is no presumption of logarithmic dependence of the velocity profile outside the viscous wall layer so the profile can accurately approximate low Reynolds number turbulent boundary layers. The effect of a pressure gradient is included in the UVP through the introduction of a modified Clauser parameter that correlates well with the parameters that determine the wake portion of the velocity profile. The inherent dependence of the UVP on Reynolds number, extended to include the effect of pressure gradient, enables it to be used as the basis of a new method for integrating the von Kármán boundary layer integral equation for a wide variety of attached wall bounded flows. To illustrate its application, the UVP is used to determine the zero-lift drag coefficient of the Joukowsky 0012 and NACA (National Advisory Committee for Aeronautics) 0012 airfoils over a wide range of chord Reynolds numbers.

show abstract

Several Cases for the Validation of Turbulence Models Implementation

Cited by 3 publications

References 16 publications

Editorial for the Special Issue “Aircraft Modeling and Simulation”

Editorial for the Special Issue “Aircraft Modeling and Simulation”

Turbulent Flow over Confined Backward-Facing Step: PIV vs. DNS

A new boundary layer integral method based on the universal velocity profile

Contact Info

Product

Resources

About