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Title: Particle image velocimetry measurements for opposing flow in a vertical channel with a differential and asymmetric heating condition

Abstract

Particle image velocimetry (PIV) measurements were carried out in an experimental investigation of laminar mixed convection in a vertical duct with a square cross-section. The main downward water-flow is driven by gravity while a portion of a lateral side is heated, and buoyancy forces produce non-stationary vortex structures close to the heated region. Various ranges of the Grashof number, Gr are studied in combination with the Reynolds number, Re varying from 300 to 700. The values of the generalized buoyancy parameter or Richardson number, Ri = Gr/Re{sup 2} parallel to the Grashof number are included in the results. The influence of these nondimensional parameters and how they affect the fluid flow structure and vortex sizes and locations are reported. The flow patterns are nonsymmetric, periodic, and exhibit increasing complexity and frequency for increasing buoyancy. For the averaged values of the resulting vortex dimensions, it was found that a better and more congruent representation occurs when employing the Grashof and Reynolds numbers as independent parameters. (author)

Authors:
 [1];  [2]
  1. Graduate Student, Facultad de Ingenieria, Universidad Nacional Autonoma de Mexico, C.U., Mexico 04510 D.F. (Mexico)
  2. Facultad de Ciencias, Universidad Nacional Autonoma de Mexico, C.U., Mexico 04510 D.F. (Mexico)
Publication Date:
OSTI Identifier:
20961993
Resource Type:
Journal Article
Journal Name:
Experimental Thermal and Fluid Science
Additional Journal Information:
Journal Volume: 32; Journal Issue: 1; Other Information: Elsevier Ltd. All rights reserved; Journal ID: ISSN 0894-1777
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; CONVECTION; GRASHOF NUMBER; REYNOLDS NUMBER; VORTICES; LAMINAR FLOW; RICHARDSON NUMBER; ASYMMETRY; HEATING; PERIODICITY; WATER; DUCTS; GRAVITATION

Citation Formats

Martinez-Suastegui, L, and Trevino, C. Particle image velocimetry measurements for opposing flow in a vertical channel with a differential and asymmetric heating condition. United States: N. p., 2007. Web. doi:10.1016/J.EXPTHERMFLUSCI.2007.04.003.
Martinez-Suastegui, L, & Trevino, C. Particle image velocimetry measurements for opposing flow in a vertical channel with a differential and asymmetric heating condition. United States. https://doi.org/10.1016/J.EXPTHERMFLUSCI.2007.04.003
Martinez-Suastegui, L, and Trevino, C. 2007. "Particle image velocimetry measurements for opposing flow in a vertical channel with a differential and asymmetric heating condition". United States. https://doi.org/10.1016/J.EXPTHERMFLUSCI.2007.04.003.
@article{osti_20961993,
title = {Particle image velocimetry measurements for opposing flow in a vertical channel with a differential and asymmetric heating condition},
author = {Martinez-Suastegui, L and Trevino, C},
abstractNote = {Particle image velocimetry (PIV) measurements were carried out in an experimental investigation of laminar mixed convection in a vertical duct with a square cross-section. The main downward water-flow is driven by gravity while a portion of a lateral side is heated, and buoyancy forces produce non-stationary vortex structures close to the heated region. Various ranges of the Grashof number, Gr are studied in combination with the Reynolds number, Re varying from 300 to 700. The values of the generalized buoyancy parameter or Richardson number, Ri = Gr/Re{sup 2} parallel to the Grashof number are included in the results. The influence of these nondimensional parameters and how they affect the fluid flow structure and vortex sizes and locations are reported. The flow patterns are nonsymmetric, periodic, and exhibit increasing complexity and frequency for increasing buoyancy. For the averaged values of the resulting vortex dimensions, it was found that a better and more congruent representation occurs when employing the Grashof and Reynolds numbers as independent parameters. (author)},
doi = {10.1016/J.EXPTHERMFLUSCI.2007.04.003},
url = {https://www.osti.gov/biblio/20961993}, journal = {Experimental Thermal and Fluid Science},
issn = {0894-1777},
number = 1,
volume = 32,
place = {United States},
year = {Mon Oct 15 00:00:00 EDT 2007},
month = {Mon Oct 15 00:00:00 EDT 2007}
}