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NUMERICAL STUDIES ON THE NATURAL SMOKE VENTING OF ATRIA

Karolina ŻYDEK
Karolina ŻYDEK
 und 
Małgorzata KRÓL
Małgorzata KRÓL
   | 07. Jan. 2020
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Article Category: research-article
Online veröffentlicht: 07. Jan. 2020
Seitenbereich: 135 - 144
Eingereicht: 15. Okt. 2019
Akzeptiert: 18. Nov. 2019
DOI: https://doi.org/10.21307/acee-2019-059
Schlüsselwörter
© 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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