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Vertically distributed wall sources of buoyancy. Part 2. Unventilated and ventilated confined spaces.

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Title: Vertically distributed wall sources of buoyancy. Part 2. Unventilated and ventilated confined spaces.
Authors: Parker, D. A.1 (AUTHOR), Burridge, H. C.2 (AUTHOR) h.burridge@imperial.ac.uk, Partridge, J. L.1 (AUTHOR), Hacker, J. N.3 (AUTHOR), Linden, P. F.1 (AUTHOR)
Source: Journal of Fluid Mechanics. 1/25/2021, Vol. 907, p1-27. 27p.
Subjects: Heat radiation & absorption, Solar heating, Heat flux, Stratified flow, Buoyancy
Abstract: We examine the flow resulting from a vertically distributed wall-source plume in both an unventilated and ventilated space. First, we present experimental ambient buoyancy measurements for an unventilated 'filling box' where the developing ambient buoyancy profiles are successfully modelled using an adapted 'peeling' model which incorporates results presented in Part 1 of this work. We then present steady-state ambient buoyancy measurements for a ventilated box. Using dye visualisation, it is observed that, in the steady state, negligible ambient vertical transport occurs within the stratified region, implying a linear ambient buoyancy stratification within this region, and we predict the gradient of this linear stratification. Finally, we apply our experimental results to two practical examples. We present a methodology to create a given linear ambient temperature stratification within a room via a prescribed uniform wall heat flux and consider the resulting temperature stratification within a large ventilated atrium with a wall heated by solar radiation. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 147715910
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Vertically distributed wall sources of buoyancy. Part 2. Unventilated and ventilated confined spaces.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Fluid+Mechanics%22">Journal of Fluid Mechanics</searchLink>. 1/25/2021, Vol. 907, p1-27. 27p.
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  Data: <searchLink fieldCode="DE" term="%22Heat+radiation+%26+absorption%22">Heat radiation & absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+heating%22">Solar heating</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+flux%22">Heat flux</searchLink><br /><searchLink fieldCode="DE" term="%22Stratified+flow%22">Stratified flow</searchLink><br /><searchLink fieldCode="DE" term="%22Buoyancy%22">Buoyancy</searchLink>
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  Data: We examine the flow resulting from a vertically distributed wall-source plume in both an unventilated and ventilated space. First, we present experimental ambient buoyancy measurements for an unventilated 'filling box' where the developing ambient buoyancy profiles are successfully modelled using an adapted 'peeling' model which incorporates results presented in Part 1 of this work. We then present steady-state ambient buoyancy measurements for a ventilated box. Using dye visualisation, it is observed that, in the steady state, negligible ambient vertical transport occurs within the stratified region, implying a linear ambient buoyancy stratification within this region, and we predict the gradient of this linear stratification. Finally, we apply our experimental results to two practical examples. We present a methodology to create a given linear ambient temperature stratification within a room via a prescribed uniform wall heat flux and consider the resulting temperature stratification within a large ventilated atrium with a wall heated by solar radiation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1017/jfm.2020.809
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      – Code: eng
        Text: English
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        PageCount: 27
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      – SubjectFull: Heat radiation & absorption
        Type: general
      – SubjectFull: Solar heating
        Type: general
      – SubjectFull: Heat flux
        Type: general
      – SubjectFull: Stratified flow
        Type: general
      – SubjectFull: Buoyancy
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      – TitleFull: Vertically distributed wall sources of buoyancy. Part 2. Unventilated and ventilated confined spaces.
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              M: 01
              Text: 1/25/2021
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              Y: 2021
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