eprintid: 10058275
rev_number: 14
eprint_status: archive
userid: 608
dir: disk0/10/05/82/75
datestamp: 2018-10-15 09:49:10
lastmod: 2020-02-12 16:13:00
status_changed: 2018-10-15 09:49:10
type: proceedings_section
metadata_visibility: show
creators_name: Mulahasan, S
creators_name: Stoesser, T
title: Inferring Thermal Turbulent Structures Properties in the Wake of an Array Cylindrical Obstacles
ispublished: pub
divisions: UCL
divisions: A01
divisions: B04
divisions: C05
divisions: F44
note: This is an open access article distributed under the terms of the Creative Commons
Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).
abstract: In this study a thermal camera was used to inferring the properties of thermal turbulent structures at the water surface of an array of emergent vertical cylindrical obstacles located in staggered fashion at one side of an open channel flow. Three different diameters (D = 1.25 cm, 2.5 cm and 5.0 cm) were tested. A thermal camera SC640 was used to record a series of snapshots of the water surface temperature distribution in the wake of the cylinders at section where the flow was uniform and fully developed. The selection was made after watching a video to locate the most suitable areas for eddies and turbulence development. For the selected location, temperature values were extracted for each sequence at five selection points in the wake region using Matlab software. Time series of temperature for the snapshots of the five selected points in the area of eddy formation were drawn. The energy of the eddies were extracted using Fourier transforms. The results showed successive peaks with a slope of - 5/3. Evaluation of the eddies in the wake of the cylindrical rods showed that the energy of the eddies is small at high frequency and large eddies were observed at low frequencies.
date: 2018-09-05
date_type: published
publisher: E3S Web of Conferences
official_url: https://doi.org/10.1051/e3sconf/20184005007
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1589481
doi: 10.1051/e3sconf/20184005007
lyricists_name: Stoesser, Thorsten
lyricists_id: TSTOE28
actors_name: Cuccu, Clara
actors_id: CCCUC40
actors_role: owner
full_text_status: public
series: Fluid mechanics and sediment processes
publication: E3S Web of Conferences
volume: 40
place_of_pub: Lyon, France
pagerange: 1-8
event_title: River Flow 2018 : 9th International Conference on Fluvial Hydraulics
issn: 2267-1242
book_title: Proceedings of the River Flow 2018 : 9th International Conference on Fluvial Hydraulics
citation:        Mulahasan, S;    Stoesser, T;      (2018)    Inferring Thermal Turbulent Structures Properties in the Wake of an Array Cylindrical Obstacles.                     In:  Proceedings of the River Flow 2018 : 9th International Conference on Fluvial Hydraulics.  (pp. pp. 1-8).  E3S Web of Conferences: Lyon, France.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10058275/1/Mulahasan_3sconf_riverflow2018_05007.pdf