de.pangaea.dataset982597 und dataset PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact 2026-07-15T18:36:06Z https://doi.pangaea.de/10.1594/PANGAEA.982597 2025-11-11T10:15:10 publication https://doi.org/10.1594/PANGAEA.982597 Li, Huixin

lihuixin@imech.ac.cn

https://orcid.org/0000-0002-7067-3492 information author Zamani Asl, Mohammad Mehdi

mehdi.zamani@zarm.uni-bremen.de

https://orcid.org/0000-0002-1322-6258 information author Baeuerlein, Bastian

bastian.baeuerlein@uni-oldenburg.de

https://orcid.org/0000-0003-2614-6190 information author Avila, Kerstin

kerstin.avila@uni-oldenburg.de

https://orcid.org/0000-0002-7921-8234 information author Xu, Duo

duo.xu@zarm.uni-bremen.de

https://orcid.org/0000-0001-8330-3581 information author Avila, Marc

marc.avila@zarm.uni-bremen.de

https://orcid.org/0000-0001-5988-1090 information author PANGAEA

info@pangaea.de

https://www.pangaea.de/ information publisher tableDigital One of the most widespread canonical devices for fluid mixing is the T-shaped mixer, in which two opposing miscible liquid streams meet at a junction and then mix along a main channel. Laminar steady and time-periodic flows in T-shaped mixers have been thoroughly studied, but turbulent flows have received much less scrutiny despite their prevalence in applications. We here present optical measurements of turbulent mixing at small scales in a novel experimental setup with a hydraulic diameter of four centimetres. Water is used as a working fluid and the Reynolds number,Re, based on the bulk velocity and hydraulic diameter ranges from the laminar (Re=100) to the fully turbulent case (Re=5000). The data comprises two-dimensional particle image velocimetry (PIV) of the velocity field and planar laser-induced fluorescence measurements (PLIF) of the passive scalar (Rhodamine 6G). First, we successfully replicate characteristic flow regimes observed in micro-scale T-shaped mixers at low Reynolds numbers. We then focus on the turbulent regime and characterize the turbulent kinetic energy and dissipation along the mixing channel. Further, we determine the scalar concentration variance and its corresponding probability density function and spectra. The latter exhibits an incipient Batchelor scaling. We estimate the mechanical-to-scalar timescale ratio and examine the link between the turbulent velocity and scalar fields. The measurement data are compared with model predictions and correlations used in engineering practice, and with data from our own direct numerical simulations at Re=1500 performed with a spectral-element code. completed Particle Image Velocimetry Planar laser-induced fluorescence T-shaped mixer turbulent mixing theme 1995-01-01 creation PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation Binary Object thematicClassification Figure thematicClassification Title thematicClassification File name thematicClassification Variable thematicClassification File format thematicClassification Description thematicClassification text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.982597?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data.