Experimental Study of Free Convection at an Indoor Glazing Surface with a Venetian Blind

Machin, Alan; Naylor, David; Harrison, S. J.; Oosthuizen, Patrick H.

doi:10.1080/10789669.1998.10391397

Cited by 42 publications

(65 citation statements)

References 5 publications

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“…One of + There is some confusion on this point. Phillips [32] states that "The computed Nusselt numbers are about 25% higher than the commonly available correlations ..." 22 the most interesting aspects of Phillips' work is that a visual representation of an isothermal surface was produced (Ra≈64,800) and this figure has a striking similarity to the chaotic flow field observed in the current visualization work. In addition, Phillips [34] used DNS results to examine turbulence statistics and two important points can be made on the basis of these results.…”

Section: Size Of Secondary Cellssupporting

confidence: 65%

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Flow visualization of natural convection in a tall, air-filled vertical cavity

Wright

Jin²,

Hollands

et al. 2006

International Journal of Heat and Mass Transfer

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Natural convection of air in a tall vertical cavity was studied using a smoke patterns and interferometry. Experiments covered Rayleigh numbers of 4,850 < Ra < 54,800 and aspect ratio A ≈ 40. Secondary cells were noted at Ra as low as 6,228. The flow was stable at Ra < 10 4 . As Ra exceeded 10 4 the flow became irregular, the core flow became increasingly unsteady and 3-D motion became evident. Interferometry showed that most of the temperature drop exists in boundary layers near the walls. The core is well-mixed and of relatively uniform temperature with little or no vertical stratification.

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Section: Size Of Secondary Cellssupporting

confidence: 65%

“…Hauf and Grigull [30] and Naylor [31]. A more detailed description of the interferometer used in the present experiment is offered by Machin et al [32].…”

Section: Smoke Flow Visualizationmentioning

confidence: 99%

Flow visualization of natural convection in a tall, air-filled vertical cavity

Wright

Jin²,

Hollands

et al. 2006

International Journal of Heat and Mass Transfer

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“…where: Similarly, the radiative properties for the back surface of a screen layer are obtained using equations (21) to (23) Machin et al, 1998;Naylor and Lai, 2007). This cavity flow may increase the heat transfer through the blind layer.…”

Section: Screen Shadingsmentioning

confidence: 99%

“…To understand how the fluid flow behaves in cavities between window glazing and shadings, Machin et al (1998), Collins et al (2002b), and Naylor and Lai (2007) conducted interferometric experiments to visualize the temperature and air flow patterns in double glazed windows with internal and between pane metallic Venetian blinds. The local Nusselt number along the window height was measured for varying slat-tip-to-window glazing spacing.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance modelling of complex fenestration systems

Laouadi

2009

Journal of Building Performance Simulation

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10. 1080/19401490903046785 Journal of Building Performance Simulation, 2, 3, pp. 189-207, 2009-09-01 Thermal performance modeling of complex fenestration systems Laouadi, A. The methodology assumes each system layer as porous with calculated effective radiation and thermal properties. A new thermal penetration length model was developed to account for the effects of porous layers on the convective film coefficients of adjacent gas spaces, and applied to various types of shading devices. This methodology is validated using the available measurement and CFD simulation results for the U-factor of double-glazed windows with between-pane and internal blinds.

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“…서로 직각으로 놓인 거울면 구조체는, 제한된 조건에서 이런 효과를 얻을 수 있으며, 이러한 직각거울 구조를 미세 하게 반복배열하여 반사면을 구성하면 다양한 용도의 재귀 반사체, RR(Retro Reflector)로서 활용될 수 있다. [1][2][3][4][5][6][7][8][9][10][11][12] 도로 교통 안전과 관련한 재귀반사체의 쓰임은 이미 매우 범용적 이며, [4] 이미 상당한 관련 지침 [11,12] 도 제정되어 있다. 각종 광소자의 resonator로 사용되는 경우도 있으며, [7] 건축분야에 서도 '베네치안 블라인드' 등의 차양 및 채광구조물의 날개 에 '주름판형-재귀반사체', St-RR(Strap type-Retro Reflector)를 도입하고 신제품에 적용시키는 노력이 경주되고 있다.…”

Section: 서 론unclassified