The impact of hemodynamic factors in a coronary main artery to detect the atherosclerotic severity: Single and multiple sequential stenosis cases

KE Hoque, M Ferdows, S Sawall, EE Tzirtzilakis… - Physics of …, 2021 - pubs.aip.org
A conventional invasive catheterization procedure is currently used to detect atherosclerotic
severity in coronary arteries. However, it is still challenging to measure multiple consecutive …

[HTML][HTML] Sidewall effect on turbulent band in subcritical transition of high-aspect-ratio duct flow

K Kohyama, M Sano, T Tsukahara - Physics of Fluids, 2022 - pubs.aip.org
We numerically studied high-aspect-ratio channel flows with spanwise sidewalls, that is,
wide duct flows, in its subcritical turbulent transitional regime. The infinite channel flow is …

Nonlinear optimal perturbations and formation mechanism of localized wave packet in channel flow

L Zhang, J Tao - Physics of Fluids, 2023 - pubs.aip.org
The subcritical transition in a two-dimensional channel flow is characterized by the
emergence of localized wave packet (LWP). In this paper, the nonlinear nonmodal …

[HTML][HTML] Slip boundary effect on the critical Reynolds number of subcritical transition in channel flow

Y Xiao, L Zhang, J Tao - Theoretical and Applied Mechanics Letters, 2023 - Elsevier
In this letter, the effect of slip boundary on the origin of subcritical transition in two-
dimensional channel flows is studied numerically and theoretically. It is shown that both the …

Large-scale mean flow and inclination of isolated turbulent band in channel flow

L Zhang, J Tao - arXiv preprint arXiv:2310.03238, 2023 - arxiv.org
Isolated turbulent bands observed in transitional channel flows have downstream heads and
inclined bulks at a characteristic angle. In the large-scale mean flow, a $\nu $-shape vortex …

A numerical study of the side-wall effects on turbulent bands in channel flow at transitional Reynolds numbers

H Wu, B Song - Computers & Fluids, 2022 - Elsevier
We investigated the side-wall effects on turbulent bands in channel flow at transitional
Reynolds numbers by direct numerical simulations using the open source spectral-element …

Linear and nonlinear optimal growth mechanisms for generating turbulent bands

E Parente, JC Robinet, P De Palma… - Journal of Fluid …, 2022 - cambridge.org
Recently, many authors have investigated the origin and growth of turbulent bands in shear
flows, highlighting the role of streaks and their inflectional instability in the process of band …

Intermittency, moments, and friction coefficient during the subcritical transition of channel flow

J Liu, Y Xiao, M Li, J Tao, S Xu - Entropy, 2020 - mdpi.com
The intermittent distribution of localized turbulent structures is a key feature of the subcritical
transitions in channel flows, which are studied in this paper with a wind channel and …

Second-order phase transition in counter-rotating Taylor–Couette flow experiment

K Avila, B Hof - Entropy, 2020 - mdpi.com
In many basic shear flows, such as pipe, Couette, and channel flow, turbulence does not
arise from an instability of the laminar state, and both dynamical states co-exist. With …

Pattern preservation during the decay and growth of localized wave packet in two-dimensional channel flow

L Zhang, J Tao - Physics of Fluids, 2022 - pubs.aip.org
In this paper, the decay and growth of localized wave packet (LWP) in a two-dimensional
plane-Poiseuille flow are studied numerically and theoretically. When the Reynolds number …