Using a PANS Simulation Approach for the Transient Flow Around the Japan Bulk Carrier

Bensow, Rickard; Boogaard, Maurits van den

doi:10.5957/josr.09180064

Cited by 4 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[12][13][14][15][16][17]) or the closely related k À x models (e.g., Refs. [9,[18][19][20]). Interesting recent developments are the use of a nonlinear closure as PANS model (e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%

The Development of a Partially Averaged Navier–Stokes KSKL Model

Klapwijk

Lloyd

Vaz³

2022

Journal of Fluids Engineering

View full text Add to dashboard Cite

A new partially averaged Navier-Stokes (PANS) closure is derived based on the KSKL model. The aim of this new model is to incorporate the desirable features of the KSKL model, compared to the SST model, into the PANS framework. These features include reduced eddy-viscosity levels, a lower dependency on the cell height at the wall, well-defined boundary conditions, and improved iterative convergence. As well as the new model derivation, the paper demonstrates that these desirable features are indeed maintained, for a range of modeled-to-total turbulence kinetic energy ratios (f_k), and even for multiphase flow.

show abstract

“…[12][13][14][15][16][17]) or the closely related k À x models (e.g., Refs. [9,[18][19][20]). Interesting recent developments are the use of a nonlinear closure as PANS model (e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%

The Development of a Partially Averaged Navier–Stokes KSKL Model

Klapwijk

Lloyd

Vaz³

2022

Journal of Fluids Engineering

View full text Add to dashboard Cite

show abstract

“…Scale-resolving simulation (SRS) models are nowadays widely applied in computation of turbulent flow problems of practical interest, e.g., vehicle aerodynamics and hydrodynamics [1,2,3,4,5,6,7], offshore engineering [8,9,10,11,12,13], propeller design [14,15,16,17,18,19], material mixing [20,21,22,23,24,25], and combustion [26,27,28,29,30,31]. These formulations are characterized by their ability to resolve a fraction of or all turbulence scales present in a flow.…”

Section: Introductionmentioning

confidence: 99%

Verification and Validation: the Path to Predictive Scale-Resolving Simulations of Turbulence

Pereira,

Grinstein,

Israel

et al. 2021

Preprint

View full text Add to dashboard Cite

This work investigates the importance of verification and validation (V&V) to achieve predictive scale-resolving simulations (SRS) of turbulence, i.e., computations capable of resolving a fraction of the turbulent flow scales. Toward this end, we present a novel but simple V&V strategy based on grid and physical resolution refinement studies that can be used even when the exact initial flow conditions are unknown, or reference data is unavailable. This is particularly relevant for transient and transitional flow problems, as well as for the improvement of turbulence models. We start by presenting a literature survey of results obtained with distinct SRS models for flows past circular cylinders. It confirms the importance of V&V by illustrating a large variability of results, which is independent of the selected mathematical model and Reynolds number. The proposed V&V strategy is then used on three representative problems of practical interest. The results illustrate that it is possible to conduct reliable verification and validation exercises with SRS models, and evidence the importance of V&V to predictive SRS of turbulence. The data also confirm the advantages of the proposed V&V strategy.

show abstract

Partially-averaged Navier–Stokes simulations of turbulent flow past a square cylinder: Comparative assessment of statistics and coherent structures at different resolutions

2020

View full text Add to dashboard Cite

Scale-resolving simulations of the turbulent wake behind a square cylinder are performed at Re = 22 000 using the partially averaged Navier–Stokes (PANS) k-ω closure model at different degrees of resolution (cut-off scales) corresponding to the unresolved-to-total kinetic energy ratio fk ∈ [0.10, 0.50]. The two principle objectives of the study are to (i) establish the degree of resolution required for an accurate computation of different quantities of interest ranging from flow statistics to coherent structures and (ii) develop a protocol for a quantitative assessment and comparison of the large-scale coherent structures simulated at different degrees of resolution. Straightforward use of proper orthogonal decomposition (POD) to assess and compare large-scale coherence at different resolution levels can prove difficult as small-scale features can affect the POD mode shape and amplitude. To overcome this difficulty, two methods of quantifying coherent structures in the wake are proposed. These methods are based upon the incorporation of Fourier and Chebyshev decompositions with spectral proper orthogonal decomposition, respectively. We examine the first-mode energy spectra and the corresponding streamwise mode shapes using the results generated from PANS simulations at different degrees of resolution. It is demonstrated that increasingly finer resolutions are needed for integral quantities, one-point statistics, frequency spectra, and coherent structures, in that order. The underlying physics is explicated.

show abstract

Using a PANS Simulation Approach for the Transient Flow Around the Japan Bulk Carrier

Cited by 4 publications

References 4 publications

The Development of a Partially Averaged Navier–Stokes KSKL Model

The Development of a Partially Averaged Navier–Stokes KSKL Model

Verification and Validation: the Path to Predictive Scale-Resolving Simulations of Turbulence

Partially-averaged Navier–Stokes simulations of turbulent flow past a square cylinder: Comparative assessment of statistics and coherent structures at different resolutions

Contact Info

Product

Resources

About