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NUMERICAL STUDIES ON THE NATURAL SMOKE VENTING OF ATRIA

Karolina ŻYDEK

Karolina ŻYDEK

Department of Heating, Ventilation and Dust Removal Technology, Faculty of Energy and Environmental Engineering, Silesian University of TechnologyGliwice, Poland
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ŻYDEK, Karolina
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Małgorzata KRÓL

Małgorzata KRÓL

Department of Heating, Ventilation and Dust Removal Technology, Faculty of Energy and Environmental Engineering, Silesian University of TechnologyGliwice, Poland
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KRÓL, Małgorzata
  
07 gen 2020
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Categoria dell'articolo: research-article
Pubblicato online: 07 gen 2020
Pagine: 135 - 144
Ricevuto: 15 ott 2019
Accettato: 18 nov 2019
DOI: https://doi.org/10.21307/acee-2019-059
Parole chiave
© 2019 Karolina ŻYDEK et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Layout and main dimensions of the model
Layout and main dimensions of the model

Figure 2.

The construction of the atrium roof: a) front view, b) view from above
The construction of the atrium roof: a) front view, b) view from above

Figure 3.

Model situation in the computational domain in case 1
Model situation in the computational domain in case 1

Figure 4.

Model situation in the computational domain in case 2
Model situation in the computational domain in case 2

Figure 5.

Model situation in the computational domain in case 3
Model situation in the computational domain in case 3

Figure 6.

Layout of the sensors in the plume region
Layout of the sensors in the plume region

Figure 7.

Layout of the sensors near the wall: a) wall A, b) wall C
Layout of the sensors near the wall: a) wall A, b) wall C

Figure 8.

FDS results. Case 3: soot density at fire time 240s
FDS results. Case 3: soot density at fire time 240s

Figure 9.

FDS results. Case 3: temperature at time 240s in the section plane of a pool fire
FDS results. Case 3: temperature at time 240s in the section plane of a pool fire

Figure 10.

FDS results. Case 2: soot density at fire time 450s
FDS results. Case 2: soot density at fire time 450s

Figure 11.

FDS results. Case 2: temperature at time 450s in the section plane of a pool fire
FDS results. Case 2: temperature at time 450s in the section plane of a pool fire

Figure 12.

Temperature predictions in the exhaust vent
Temperature predictions in the exhaust vent

Figure 13.

Temperature predictions in the plume: a) 4.55 m above the pool fire, b) 8.55 m above pool fire, c)12.55 m above pool fire
Temperature predictions in the plume: a) 4.55 m above the pool fire, b) 8.55 m above pool fire, c)12.55 m above pool fire

Figure 14.

Air temperature predictions close to wall A: a) h = 15.15 m, b) h = 10.15 m, c) h = 5.15 m
Air temperature predictions close to wall A: a) h = 15.15 m, b) h = 10.15 m, c) h = 5.15 m

Summary of the three considered cases_

Case Heat release rate Burning time Dimensions of the computational domain Dimensions of the mesh cells Number of cells in each direction
1 2.34 MW 900 s 25×25×25 m 0.25×0.25×0.25 m X,Y,Z: 100
2 22×22×24 m 0.2×0.2×0.2 m X,Y: 110Z: 120
3 25×25×25 m 5 m around plume region: 0.125×0.125×0.125 mRemaining part of the model: 0.25×0.25×0.25 m Near the plume region: X,Y: 40Z: 200Remaining part of the model: X,Y,Z: 100

Relationship between D* and δx

Case Cell size, m δx Heat Release Rate, kW Characteristic fire diameter, m D* D*/ δx
1 0.25 2600 1.35 5.40
2 0.20 6.75
3 0.125 10.80
0.25 5.40
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