Direct numerical simulation of hypersonic turbulent boundary layers: effect of spatial evolution and Reynolds number

J Huang, L Duan, MM Choudhari - Journal of Fluid Mechanics, 2022 - cambridge.org
Direct numerical simulations (DNS) are performed to investigate the spatial evolution of flat-
plate zero-pressure-gradient turbulent boundary layers over long streamwise domains () …

Direct numerical simulation database for supersonic and hypersonic turbulent boundary layers

C Zhang, L Duan, MM Choudhari - AIAA journal, 2018 - arc.aiaa.org
This paper presents a direct numerical simulation database of high-speed zero-pressure-
gradient turbulent boundary layers develo** spatially over a flat plate with nominal …

Natural convection heat transfer enhancement in new designs of plate-fin based heat sinks

SS Haghighi, HR Goshayeshi, MR Safaei - International Journal of Heat …, 2018 - Elsevier
Experimental investigation was conducted to measure the convective heat transfer
coefficient and thermal performance of plate fins and plate cubic pin-fins heat sinks, under …

The influence of near-wall density and viscosity gradients on turbulence in channel flows

A Patel, BJ Boersma, R Pecnik - Journal of Fluid Mechanics, 2016 - cambridge.org
The influence of near-wall density and viscosity gradients on near-wall turbulence in a
channel is studied by means of direct numerical simulation of the low-Mach-number …

Data-driven compressibility transformation for turbulent wall layers

PS Volpiani, PS Iyer, S Pirozzoli, J Larsson - Physical Review Fluids, 2020 - APS
A scaling formula for the mean velocity and wall distance in compressible turbulent wall-
bounded flows is developed. The development is both physics-and data-driven: universality …

Compressibility effects on hypersonic turbulent channel flow with cold walls

M Yu, CX Xu - Physics of Fluids, 2021 - pubs.aip.org
Compressibility effects on velocity and temperature fluctuations in hypersonic turbulence
over cold walls are investigated by exploiting a direct numerical simulation database. We …

Entropy generation in a circular tube heat exchanger using nanofluids: effects of different modeling approaches

MM Rashidi, M Nasiri, MS Shadloo… - Heat Transfer …, 2017 - Taylor & Francis
The main goal of this paper is to compare single-and two-phase modeling approaches for
forced convection flow of water/TiO2 nanofluid. The considered geometry is a horizontal …

Statistics and dynamics of coherent structures in compressible wall-bounded turbulence

M Yu, SW Dong, XX Yuan, CX Xu - Science China Physics, Mechanics & …, 2024 - Springer
Compressible wall-bounded turbulence is ubiquitously encountered in modern aerospace
and mechanical industries. In this review, we summarize the current state of the literature on …

A CFD study of particle deposition in three-dimensional heat exchange channel based on an improved deposition model

H Lu, Y Quan - International Journal of Heat and Mass Transfer, 2021 - Elsevier
Airborne particle deposition in the heat exchange channel will cause serious heat transfer
efficiency reduction. Better understanding of deposition characteristics is of significance for …

Effect of wall cooling on boundary-layer-induced pressure fluctuations at Mach 6

C Zhang, L Duan, MM Choudhari - Journal of Fluid Mechanics, 2017 - cambridge.org
Direct numerical simulations of turbulent boundary layers with a nominal free-stream Mach
number of in order to investigate pressure fluctuations and their dependence on wall …