Numerical simulation of buoyant flow in a roof of triangular cross-section under winter day boundary conditions

Asan, Habip; Namli, Lutfu

doi:10.1016/s0378-7788(01)00063-9

Cited by 101 publications

(51 citation statements)

References 12 publications

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“…It is seen in this comparison that the results of this study match on a large scale with the results of Abu-Mulaweh et al [24]. The results of the present study were also verified by comparison with the numerical results of Asan and Namli [25,26]. …”

Section: Model Validationsupporting

confidence: 89%

Thermal Behaviour of the Residential Buildings with Cantilever Beam under Winter Day Boundary Conditions

Namli

2017

Hittite J. Sci. Eng.

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In this study, the thermal behaviour of residential buildings with cantilever beam under winter boundary conditions was numerically investigated by means of the open-ended structure approach. For this purpose, parametric studies were carried out for various ratios of cantilever beam depth/cantilever beam height (d/H) and Rayleigh numbers using a computer program for no wind laminar flow conditions. Analyses were conducted for Rayleigh numbers in the range of 10 3 to 10 6 . The calculations were carried out for the ratios of d/H, namely 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0. The working fluid was treated as air (Pr=0.71). According to the findings, the mean Nu number along with the outer vertical wall (surface L) of the residential building, in general, decreases as d/H increases. This decrease in the mean Nu number is evident for Ra≤10 4 , but it appears to be more pronounced after Ra=10 5 . To have minimum heat loss from a residential building under winter day boundary conditions, it is suggested that the ratio of d/H should be between 0.2 and 0.5.

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Section: Model Validationsupporting

confidence: 89%

Thermal Behaviour of the Residential Buildings with Cantilever Beam under Winter Day Boundary Conditions

Namli

2017

Hittite J. Sci. Eng.

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“…(7), (8) and (14) the value of 0.1 is taken for under-relaxation parameter. The uppermost grid-point on each vertical grid line coincided with the top wall of the triangular enclosure as indicated by Haese and Teubner [32] and Asan and Namli [15], as seen in Fig. 1b.…”

Section: Tablementioning

confidence: 82%

“…The numbers of studies on nonisothermal boundary conditions are limited for enclosures filled with clear fluids [10][11][12] and cavities filled with fluid-saturated porous media [13,14]. The shape of enclosure can be different than rectangular geometry such as triangle [15,16], parallelogram [17] or trapezoidal enclosures [18][19][20][21] depending on application requirements. To our best knowledge, the problem of natural convection in a triangular enclosure filled with fluid-saturated porous media with non-isothermal boundary conditions has not been investigated before.…”

Section: Introductionmentioning

confidence: 99%

Visualization of natural convection heat transport using heatline method in porous non-isothermally heated triangular cavity

Varol¹,

Öztop²,

Mobedi³

et al. 2008

International Journal of Heat and Mass Transfer

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“…Since the triangular geometry is commonly preferred for roofs (atticspaces) [12][13][14][15][16][17]. But, the study of convection heat transfer in triangular geometry has attained the prominent attention owing to its readily use in the engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of mixed convection in a lid-driven triangular cavity with a circular cylinder using ANN modeling

Nahak¹,

Triveni²,

Panua³

2017

IJHT

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The study of laminar mixed convection is conducted in an air filled the lid-driven triangular cavity with a static circular cylinder. The circular cylinder is fixed at the center of the triangular cavity whose diameter is varied with respect to the height of the cavity and the variation is shown in terms of aspect ratio (AR = D/H). Sides of the cavity and the cylinder are maintained at uniform temperature whereas the cylinder temperature is considered higher than the walls of the cavity. Finite volume method is adopted to solve the governing equations. The present problem is investigated for different constraint parameters such as moving walls, different geometries of the hot wall, different aspect ratio, Richardson number (Ri) and Grashof number (Gr). The outcomes of the investigation reported that the average Nusselt number is found significant at AR = 1/2, Ri = 0.1 and Gr = 105. An Artificial Neural Network (ANN) tool is employed in the study to validate the obtained numerical results of stream functions and Nusselt number.

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Numerical simulation of buoyant flow in a roof of triangular cross-section under winter day boundary conditions

Cited by 101 publications

References 12 publications

Thermal Behaviour of the Residential Buildings with Cantilever Beam under Winter Day Boundary Conditions

Thermal Behaviour of the Residential Buildings with Cantilever Beam under Winter Day Boundary Conditions

Visualization of natural convection heat transport using heatline method in porous non-isothermally heated triangular cavity

Numerical investigation of mixed convection in a lid-driven triangular cavity with a circular cylinder using ANN modeling

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