A numerical investigation about the effects of Reynolds number on the flow around an appended axisymmetric body of revolution

Posa, Antonio; Balaras, Elias

doi:10.1017/jfm.2019.961

Cited by 56 publications

(15 citation statements)

References 37 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Axisymmetric bodies with inflection points have been studied in the past by Huang, Groves & Belt (1980). Posa & Balaras (2016, 2020) studied the appended SUBOFF hull at length-based Reynolds numbers and , finding that the peak of turbulent kinetic energy was shifted away from the wall to form a double-peaked profile of turbulent stresses in the wake. Kumar & Mahesh (2018 b ) performed LES on the bare hull configuration of the SUBOFF geometry, witnessing the same behaviour of turbulence quantities in the wake and commenting on the higher skin friction and higher radial decay of turbulence from the wall compared to flat-plate TBLs.…”

Section: Introductionmentioning

confidence: 99%

Large-eddy simulation and streamline coordinate analysis of flow over an axisymmetric hull

Morse

Mahesh²

2021

J. Fluid Mech.

View full text Add to dashboard Cite

A new perspective on the analysis of turbulent boundary layers on streamlined bodies is provided by deriving the axisymmetric Reynolds-averaged Navier–Stokes equations in an orthogonal coordinate system aligned with streamlines, streamline-normal lines and the plane of symmetry. Wall-resolved large-eddy simulation using an unstructured overset method is performed to study flow about the axisymmetric DARPA SUBOFF hull at a Reynolds number of $Re_L = 1.1 \times 10^{6}$ based on the hull length and free-stream velocity. The streamline-normal coordinate is naturally normal to the wall at the hull surface and perpendicular to the free-stream velocity far from the body, which is critical for studying bodies with concave streamwise curvature. The momentum equations naturally reduce to the differential form of Bernoulli's equation and the $s$ – $n$ Euler equation for curved streamlines outside of the boundary layer. In the curved laminar boundary layer at the front of the hull, the streamline momentum equation represents a balance of the streamwise advection, streamwise pressure gradient and viscous stress, while the streamline-normal equation is a balance between the streamline-normal pressure gradient and centripetal acceleration. In the turbulent boundary layer on the mid-hull, the curvature terms and streamwise pressure gradient are negligible and the results conform to traditional analysis of flat-plate boundary layers. In the thick stern boundary layer, the curvature and streamwise pressure gradient terms reappear to balance the turbulent and viscous stresses. This balance explains the characteristic variation of static pressure observed for thick boundary layers at the tails of axisymmetric bodies.

show abstract

Section: Introductionmentioning

confidence: 99%

Large-eddy simulation and streamline coordinate analysis of flow over an axisymmetric hull

Morse

Mahesh²

2021

J. Fluid Mech.

View full text Add to dashboard Cite

show abstract

“…The accuracy and robustness of the WALE model as implemented in the solver utilized in the present study has been established in a variety of complex flows, from naval hydrodynamics (Balaras et al. 2015; Posa & Balaras 2016, 2018, 2020; Posa, Broglia & Balaras 2019 a ) to turbomachinery (Posa, Lippolis & Balaras 2015, 2016; Posa & Lippolis 2018, 2019) applications. Posa & Balaras (2018), for example, reported LES of a self-propelled submarine and verified that the model accurately reproduces the proper near wall limiting behaviour in complex geometries and non-equilibrium boundary layers, without requiring special corrections.…”

Section: Methodsmentioning

confidence: 99%

The wake structure of a propeller operating upstream of a hydrofoil

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…This model has been proved to be as accurate as the dynamic Lagrangian model, or the dynamic Smagorinsky model, at a lower computational cost. In the recent works of , 2020, the WALE model has also been applied with success to hydrodynamic applications.…”

Section: Overviewmentioning

confidence: 99%

Computational hydroacoustic analysis of the BB2 submarine using the advective Ffowcs Williams and Hawkings equation with Wall-Modeled LES

Rocca¹

2022

Applied Ocean Research

View full text Add to dashboard Cite

A numerical investigation about the effects of Reynolds number on the flow around an appended axisymmetric body of revolution

Cited by 56 publications

References 37 publications

Large-eddy simulation and streamline coordinate analysis of flow over an axisymmetric hull

Large-eddy simulation and streamline coordinate analysis of flow over an axisymmetric hull

The wake structure of a propeller operating upstream of a hydrofoil

Computational hydroacoustic analysis of the BB2 submarine using the advective Ffowcs Williams and Hawkings equation with Wall-Modeled LES

Contact Info

Product

Resources

About