Role of flow reversals in transition to turbulence and relaminarization of pulsatile flows

Gomez, J. B.; Yu, Huidan; Andreopoulos, Yiannis

doi:10.1017/jfm.2021.269

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…Relaminarization or the reverse transition of turbulent flows has been observed in various science and engineering applications [ 1 ]; however, the accurate prediction of these flow patterns remains a complicated matter. These flow mechanisms can be analyzed with some of the explanatory flow visualization techniques compared to using numerical simulation [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Relaminarization of jet impingement on a flat plate using separation-induced transition correction turbulence modeling preliminarily applied in archeological applications

Kaewbumrung,

Plengsa-Ard

2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Relaminarization of jet impingement on a flat plate using separation-induced transition correction turbulence modeling preliminarily applied in archeological applications

Kaewbumrung,

Plengsa-Ard

2024

Heliyon

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Volumetric lattice Boltzmann method for wall stresses of image-based pulsatile flows

Zhang

Gomez-Paz

Chen

et al. 2022

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Image-based computational fluid dynamics (CFD) has become a new capability for determining wall stresses of pulsatile flows. However, a computational platform that directly connects image information to pulsatile wall stresses is lacking. Prevailing methods rely on manual crafting of a hodgepodge of multidisciplinary software packages, which is usually laborious and error-prone. We present a new computational platform, to compute wall stresses in image-based pulsatile flows using the volumetric lattice Boltzmann method (VLBM). The novelty includes: (1) a unique image processing to extract flow domain and local wall normality, (2) a seamless connection between image extraction and VLBM, (3) an en-route calculation of strain-rate tensor, and (4) GPU acceleration (not included here). We first generalize the streaming operation in the VLBM and then conduct application studies to demonstrate its reliability and applicability. A benchmark study is for laminar and turbulent pulsatile flows in an image-based pipe (Reynolds number: 10 to 5000). The computed pulsatile velocity and shear stress are in good agreements with Womersley's analytical solutions for laminar pulsatile flows and concurrent laboratory measurements for turbulent pulsatile flows. An application study is to quantify the pulsatile hemodynamics in image-based human vertebral and carotid arteries including velocity vector, pressure, and wall-shear stress. The computed velocity vector fields are in reasonably well agreement with MRA (magnetic resonance angiography) measured ones. This computational platform is good for image-based CFD with medical applications and pore-scale porous media flows in various natural and engineering systems.

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Developmental Flight Instrumentation: Review of Space Shuttle, Ares I-X, and Artemis I

Goushcha

2024

AIAA SCITECH 2024 Forum

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Role of flow reversals in transition to turbulence and relaminarization of pulsatile flows

Abstract: Abstract

Cited by 3 publications

References 29 publications

Relaminarization of jet impingement on a flat plate using separation-induced transition correction turbulence modeling preliminarily applied in archeological applications

Relaminarization of jet impingement on a flat plate using separation-induced transition correction turbulence modeling preliminarily applied in archeological applications

Volumetric lattice Boltzmann method for wall stresses of image-based pulsatile flows

Developmental Flight Instrumentation: Review of Space Shuttle, Ares I-X, and Artemis I

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