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52 results for “channel flow”
Drag force on submerged flexible vegetation in an open-channel flow
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VAMONOS - Open-channel flow over weirs. Experimental data.
<p>This dataset contains the results from the experimental tests carried out at the hydraulics laboratory of the Civil Engineering School, at University of A Coruña (Spain), as part of the VAMONOS (Vertically-averaged models for non-hydrostatic flows) project (CTM2017-85171-C2-2-R). The aim of the project is the development of enhanced 2D river flow models including additional terms to account for non-hydrostatic pressure and mixed flow conditions around hydraulic structures.</p> <p>This data package includes experimental results on 9 different weir geometries that were tested in an open channel. The experimental facility consists of a 15 m flume with a square cross section of 0.5 x 0.5 m. Water depths were measured with an automatic data acquisition system on a grid of approximately 125 points. Each weir was tested under two different flow conditions. In all the tests the inlet discharge was close to 30 l/s, while the downstream water level was varied from one test to another, in order to obtain fully submerged and free discharge conditions.</p> <p>This dataset is structured in two pdf documents and three folders:</p> <ul> <li><em>Summary_tests.pdf</em>. This file summarizes all the experimental tests. </li> <li><em>Data_package_description.pdf</em>. This document includes information about the experimental facilities, the test conditions and the uploaded files.</li> <li><em>Raw_data.</em> This folder includes the raw data recorded during the tests.</li> <li><em>Matlab_files. </em>This folder contains three Matlab files (.m) that can be used to process the raw data and to generate some figures.</li> <li><em>Processed_data. </em>This folder contains three documents per weir that include the results obtained after processing the raw data. For each test, it is possible to find a pdf with the weir geometry and a text file with the results of the submerged and free discharge tests.</li> </ul> <p><strong>Those interested in experimental data for the calibration of numerical models or the analysis of empirical discharge rating curves, are suggested to work only with the data included in the folder <em>Processed_data.</em></strong></p> <p>Further details on the experimental setup are given in the document <em>Data_package_description.pdf</em></p>
Channel Islands song sparrow (Melospiza melodia) landscape genomics and adaptation to climate with gene flow dataset
<p>Disentangling the effects of neutral and adaptive processes in maintaining phenotypic variation across environmental gradients is challenging in natural populations. <span>Song sparrows (<i>Melospiza melodia</i>) on the California Channel Islands occupy a pronounced east-west climate gradient within a small spatial extent, providing a unique opportunity to examine the interaction of genetic isolation (gene flow) and the environment (selection) in driving variation</span>. We used reduced representation genomic libraries to infer the role of neutral processes (drift and restricted gene flow) and divergent selection in driving variation in thermoregulatory traits with an emphasis on the mechanisms that maintain bill divergence among islands. Analyses of 22,029 neutral SNPs confirm distinct population structure by island with restricted gene flow and relatively large effective population sizes, suggesting bill differences are likely not a product of genetic drift. Instead, we found strong support for local adaptation using 3,294 SNPs in differentiation-based and environmental association analyses coupled with genome-wide association (GWA) tests. Specifically, we identified several putatively adaptive and candidate loci in or near genes involved in bill development pathways (<i>e.g.</i>, <i>BMP</i>, <i>CaM</i>, <i>Wnt</i>), confirming the highly complex and polygenic architecture underlying bill morphology. Furthermore, we found divergence in genes associated with other thermoregulatory traits (i.e., feather structure, plumage color, and physiology). Collectively, these results suggest strong divergent selection across an island archipelago results in genomic changes in a suite of traits associated with thermal adaptation over small spatial scales. Future research should move beyond the study of univariate traits to better understand the multivariate adaptive responses to these complex climate regimes.</p>
Visualization of adiabatic gas-liquid flow in a cross-corrugated plate heat exchanger channel: Part 4 - Original photographs, non-uniform two-phase distribution
<p>These measurement data are obtained and analyzed as part of a research project on adiabatic gas-liquid flow in a cross-corrugated plate heat exchanger channel. (See list of publications below). <br> The following Creative Commons license applies to the research data (images and measurement values) uploaded to the online repositories:<br> CC-BY 4.0<br> Author: Susanne Buscher</p> <p>The measurement data is published in 2 data sets: </p> <p>Data set I: Original image data (4 parts): <br> - uniform gas injection, part 1: https://doi.org/10.5281/zenodo.7985771; <br> - uniform gas injection, part 2: https://doi.org/10.5281/zenodo.7986374; <br> - uniform gas injection, part 3: https://doi.org/10.5281/zenodo.7986384; <br> - non-uniform gas injection (part 4): https://doi.org/10.5281/zenodo.8067163<br> This data set contains the original photographs of the two-phase flow in the cross-corrugated channel obtained with a high-resolution camera. In addition, the corresponding experimental parameters and flow patterns (for part 1-3 only) are included in the CSV files.<br> For uniform and non-uniform gas injection, respectively, the images were stored in sequentially numbered folders. The numbers of the folders correspond to the numbers of the measurement points listed in the attached CSV files with the associated experimental parameters.<br> The image folders are grouped in ZIP archives. Each ZIP archive contains the single-phase reference images which can be used for the two-phase images to conduct background subtraction, because the lighting conditions are equal for all images in one ZIP archive. </p> <p>Data set II: Measurement values and processed image data: <br> - https://doi.org/10.14279/depositonce-17868; <br> This data set contains all measurement values and calculated results of all measurement points in the Excel and CSV files (e.g. pressure drop, volumetric flow rates, void fraction, measurement uncertainties).<br> In addition, the results of the image processing algorithm are included in the Excel and CSV files (e.g. mean bubble diameter, maximum bubble diameter, local film flow ratio, extent of the two-phase distribution across the channel width, measurement uncertainties).<br> The image folders contain the pre-processed images which were the input to the digital image analysis (i.e. the aligned and cropped image section of the channel without inlet, outlet, and peripheral regions and after subtraction of the image background), and the post-processed images visualizing the output of the digital image analysis for this image (i.e. detected objects are inserted as colored regions in the image section; the meaning of colors was explained in the publications of 2022 and 2023). <br> In this dataset, the image folders are also subdivided into measurements with uniform and non-uniform gas injection and designated with the numbers of the measurement points, which are listed in the Excel and CSV files.</p> <p>The two datasets are the supplementary research data for the following publications: <br> - S. Buscher, 2023, Visualization, measurement, and modelling of adiabatic gas-liquid flow in a cross-corrugated plate heat exchanger channel, Doctoral thesis, Technische Universität Berlin, https://doi.org/10.14279/depositonce-17866. (supplemented by data sets I and II) <br> - S. Buscher, 2019, Visualization and modelling of flow pattern transitions in a cross-corrugated plate heat exchanger channel with uniform two-phase distribution, International Journal of Heat and Mass Transfer 144, 118643, https://doi.org/10.1016/j.ijheatmasstransfer.2019.118643. (supplemented by data set I, part 1-3)<br> - S. Buscher, 2021, Two-phase pressure drop and void fraction in a cross-corrugated plate heat exchanger channel: Impact of flow direction and gas-liquid distribution, Experimental Thermal and Fluid Science 126, 110380, https://doi.org/10.1016/j.expthermflusci.2021.110380. (supplemented by the measurement values in the Excel and CSV files of data set II)<br> - S. Buscher, 2022, Digital image analysis of gas-liquid flow in a cross-corrugated plate heat exchanger channel: A feature-based approach on various two-phase flow patterns, International Journal of Multiphase Flow 154, 104149, https://doi.org/10.1016/j.ijmultiphaseflow.2022.104149. (supplemented by data set II)</p>
Raw data of rarefied gas flow through plain and functionalized rectangular micro channels
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Data from: Force and torque on spherical particles in micro-channel flows using computational fluid dynamics
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Channel Islands song sparrow (Melospiza melodia) landscape genomics and adaptation to climate with gene flow dataset
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Data from: A lattice Boltzmann model for the open channel flows described by the Saint-Venant equations
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Flow channelling variability in transit times and tortuosity in a fractured rock model with small scale heterogeneity
<p>Description for file "simulation-particle-data-all-cases".</p> <p>First row is header information, as follows: </p> <p>Column 1, label "avf"<br> The variance of fracture aperture fields (m2)</p> <p>Column 2, label "sdx"<br> The correlation length factor of fracture aperture fields (-)</p> <p>Column 3, label "t"<br> Particle transit time (yr)</p> <p>Column 4, label "log_t"<br> Base-10 logarithm of transit time </p> <p>Column 5, label "l"<br> Particle trajectory length (m)</p> <p>Column 6, label "tort"<br> Particle trajectory tortuosity (-)</p>
A unified flow resistance formular for open-channels with natural and engineered obstacles
<p>This repository contains data set used in the manuscript "A unified flow resistance formular for open-channels with natural and engineered obstacles" submitted to Water Resources Research by Xingyu Chen, Tao Wang, Jiamei Wang, Hongbo Ma, Marwan A. Hassan and Xudong Fu</p>
Natural turbulent (Re_tau=300) channel flow DNS simulation.
<p>Natural turbulent (Re_tau=300) channel flow DNS simulation.</p>
Characteristics of Reconnection Sites and Fast Flow Channels in an MHD Simulation: Simulation Results
The simulation outputs are asci files containing out from the MHD simulation mapped to the minimum magnetic field surface in the magnetotail during the March 14,2008 substorms. There is one time in each file and 2161 files each separated by 10s. The results span 6 hours from 0200 to 0800. The results are in GSM coordinates.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.