Equivalent fluid approach to modeling the acoustical properties of polydisperse heterogeneous porous composites

G Núñez, R Venegas, TG Zieliński, FX Bécot - Physics of Fluids, 2021 - pubs.aip.org
This paper investigates sound propagation in polydisperse heterogeneous porous
composites. The two-scale asymptotic method of homogenization is used to obtain a …

The effect of spanwise wall oscillation on spatially developing compressible transitional boundary layers

R Ma, Z Gao, S Chen, D Li - Physics of Fluids, 2023 - pubs.aip.org
Spanwise wall oscillation is an easily implemented active control scheme. It can delay the
transition to turbulent flows in incompressible boundary layers under appropriate control …

Analytical and numerical investigation of Poiseuille flow through semi-elliptic annulus

K Kundu, UK Sarkar - Physics of Fluids, 2022 - pubs.aip.org
A fully developed laminar flow through semi-elliptic annulus formed between two confocal
elliptical ducts, driven by a constant pressure-gradient, has been analyzed. The elliptic …

On the friction drag reduction mechanism of streamwise wall fluctuations

TI Józsa, E Balaras, M Kashtalyan… - International Journal of …, 2020 - Elsevier
Understanding how to decrease the friction drag exerted by a fluid on a solid surface is
becoming increasingly important to address key societal challenges, such as decreasing the …

Phase-space dynamics of near-wall streaks in wall-bounded turbulence with spanwise oscillation

W Yuan, M Zhang, Y Cui, BC Khoo - Physics of Fluids, 2019 - pubs.aip.org
This work presents systematical investigations on the skin-friction drag reduction (DR) of
turbulent channel flow subjected to spanwise wall oscillation using direct numerical …

Analytical solutions for the incompressible laminar pipe flow rapidly subjected to the arbitrary change in the flow rate

A Kannaiyan, T Varathalingarajah, S Natarajan - Physics of Fluids, 2021 - pubs.aip.org
A one-dimensional mathematical model is developed for an unsteady incompressible
laminar flow in a circular pipe subjected to a rapid change in the flow rate from an initial flow …

各向异性柔性壁上二维TS 波演化的数值研究

洪正, 叶正寅 - 力学学报, 2021 - lxxb.cstam.org.cn
受自然界鸟类羽毛的柔性特征启发, 利用数值模拟的手段进行了各向异性柔性壁面对亚音速边界
层中TS (Tollmien-Schlichting) 波空间演化的影响研究. 首先, 刚性壁面上的数值结果与线性理论 …

Exact coherent states in plane Couette flow under spanwise wall oscillation

Y Bengana, Q Yang, G Tu, Y Hwang - Journal of Fluid Mechanics, 2022 - cambridge.org
A set of several exact coherent states in plane Couette flow is computed under spanwise
wall oscillation control, with a range of wall oscillation amplitudes and periods. The exact …

Analytic investigation of the compatibility condition and the initial evolution of a smooth velocity field for the Navier–Stokes equation in a channel configuration

PT Nagy, M Kiss, G Paál - Fluid Dynamics Research, 2022 - iopscience.iop.org
A partial differential equation has usually a regular solution at the initial time if the initial
condition is smooth in space, fulfills the governing equations and is compatible with the …

Numerical investigation of the evolution of two-dimensional TS waves on an anisotropic compliant wall

H Zheng, Y Zhengyin - Chinese Journal of Theoretical and …, 2021 - lxxb.cstam.org.cn
As inspired by the flexible characteristics of the feathers of birds, the influence of an
anisotropic compliant wall on the spatial evolution of the TS wave in the subsonic boundary …