Results 11 to 20 of about 1,150 (206)

Chiral symmetry breaking and entropy production in Dean vortices [PDF]

Physics of Fluids, 2023
In toroidal pipes, the secondary flow in cross section is a mirror symmetric pair of counter-rotating axially oriented Dean vortices. This mirror symmetry is broken in helical pipes. We investigate in detail the mirror symmetry breaking in these secondary flows in going from toroidal to helical geometries.
Isabel Herreros, David Hochberg
openaire   +3 more sources

Numerical investigation of Dean vortex evolution in turbulent flow through 90° pipe bends [PDF]

Frontiers in Mechanical Engineering
The current study focuses on numerically simulating turbulent flow in a 90° pipe bend using the k-ε turbulence model. Following validation of present numerical approach against prior experimental findings, extensive research was conducted to elucidate ...
Prasun Dutta, Naveen Kumar Rajendran, Robert Cep, Rakesh Kumar, Himanshu Kumar, Yadaiah Nirsanametla   +5 more
doaj   +2 more sources

Dean-Flow Affected Lateral Focusing and Separation of Particles and Cells in Periodically Inhomogeneous Microfluidic Channels [PDF]

Sensors, 2023
The purpose of the recent work is to give a better explanation of how Dean vortices affect lateral focusing, and to understand how cell morphology can alter the focusing position compared to spherical particles.
Anita Bányai, Enikő Farkas, Hajnalka Jankovics, Inna Székács, Eszter Leelőssyné Tóth, Ferenc Vonderviszt, Róbert Horváth, Máté Varga, Péter Fürjes   +8 more
doaj   +2 more sources

Formulation of Peptide-Based Nanoparticles Using a Microfluidic Device. [PDF]

J Pept Sci
A case study using the TAMARA microfluidic device (Inside Therapeutics) was performed for peptide‐based nanoparticles under different operational parameters such as mixing channel geometry, total flow rate, and flow rate ratio. In this context, WRAP5 cell‐penetrating peptide‐based nanoparticles for siRNA or pDNA delivery demonstrated enhanced ...
Hammoum T, Konate K, Mousli Y, Deshayes S, Vivès E, Nsamela A, Boisguérin P.   +6 more
europepmc   +2 more sources

Non-uniform Convection Heat Transfer Characteristics of Supercritical Methane in 180° Curved Duct

Journal of Harbin University of Science and Technology, 2022
In order to reveal the heat transfer mechanism of supercritical methane (S-CH4) heat exchanger, the non-uniform convection heat transfer characteristics of supercritical methane (S-CH4) in a 180° curved duct are numerically analyzed.
HAN Chang-liang, YIN Peng, HAN Fang-ming, JIA Ji, XU Qi-ao, XIN Jing-qing, YAO An-ka   +6 more
doaj   +1 more source

Experimental investigation of Dean-vortices oscillation downstream of a 90° Bend

Experimental Thermal and Fluid Science
International audienceThe present work experimentally investigates the dynamics of a pipe flow downstream of a 90 degrees bend in turbulent regime. The study is carried out on two different test benches, enabling to cover a decade in Reynolds numbers (Re
Bilal Ben Haroual, Julie Albagnac, Pierre Brancher, Sébastien Cazin, Didier Boldo, Emmanuel Thibert, Romain Mathis   +6 more
openaire   +2 more sources

PIV-Measurements of Centrifugal Instabilities in a Rectangular Curved Duct with a Small Aspect Ratio

Fluids, 2021
In this study, experimental measurements were undertaken using non-intrusive particle image velocimetry (PIV) to investigate fluid flow within a 180° rectangular, curved duct geometry of a height-to-width aspect ratio of 0.167 and a curvature of 0.54 ...
Afshin Goharzadeh, Peter Rodgers
doaj   +1 more source

Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al₂O₃ and ZrO₂ Nanofluids

Nanomaterials, 2020
A new micro heat exchanger was analyzed using numerical formulation of conjugate heat transfer for single-phase fluid flow across copper microchannels. The flow across bent channels harnesses asymmetric laminar flow and dean vortices phenomena for heat ...
Muhammad Zia Ullah Khan, Emad Uddin, Bilal Akbar, Naveed Akram, Ali Ammar Naqvi, Muhammad Sajid, Zaib Ali, Md. Yamin Younis, Fausto Pedro García Márquez   +8 more
doaj   +1 more source

Effects of inlet junctions on horizontally stratified flows

AIP Advances, 2023
Horizontally stratified flows can be seen in a wide variety of micro-scale engineering problems. Recent studies have shown that diffusion at the interface between two liquids leads to a lateral flow, causing the fluid to rotate around the central axis of
Pooyan Heravi, Li-An Chu, Da-Jeng Yao
doaj   +1 more source

Passive Mixing and Convective Heat Transfer Enhancement for Nanofluid Flow across Corrugated Base Microchannels

Energies, 2023
Vortex generators and pin fins are conventionally used to deliver fluid mixing and improved convective heat transfer. The increased pressure loss following a fractional increase in heat transfer, as well as the complex manufacturing design, leave room ...
Ali Ammar Naqvi, Emad Uddin, Muhammad Zia Ullah Khan   +2 more
doaj   +1 more source