Dynamics of flow in a branching channel

Flow in a branched channel is studied experimentally using the PIV technique. The presented study is concentrated on clarifying the dynamical behaviour in individual branches. The 11 branches issuing from the main channel perpendicularly, all channels are of rectangular cross-section. First, the tim...

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Bibliographic Details
Published inMechanics & industry : an international journal on mechanical sciences and engineering applications Vol. 22; p. 25
Main Authors Uruba, Václav, Procházka, Pavel, Skála, Vladislav
Format Journal Article
LanguageEnglish
Published Villeurbanne EDP Sciences 2021
Subjects
branching channel
Channel flow
dynamics
Experiments
Flow distribution
Flow separation
Fluid flow
Geometry
opd
Reynolds number
Topology
turbulence
Velocity
Vortices
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Summary:Flow in a branched channel is studied experimentally using the PIV technique. The presented study is concentrated on clarifying the dynamical behaviour in individual branches. The 11 branches issuing from the main channel perpendicularly, all channels are of rectangular cross-section. First, the time-mean flow-field is shown, then the flow dynamics is investigated using the OPD method. Flow patterns and frequencies are evaluated in three selected branches. The separated flow in branches exhibits highly dynamical behaviour, which differs substantially in the branches close to the inflow, in the main channel middle and close to its end. The typical topologies and frequencies of the detected quasi-periodical structures in the channel braches are shown in the study. Mostly, the flow-fields are populated by trains of vortices with alternating orientation and saddle-like structures. The flow-field close to the channel walls affects heat transfer process between the wall and fluid.
ISSN:2257-7777
2257-7750
DOI:10.1051/meca/2021014