Comparing Speed and Accuracy of Fast Alternatives to CFD for Ventilation Design

Eugene Mamulova; Twan van Hooff

Comparing Speed and Accuracy of Fast Alternatives to CFD for Ventilation Design

Building Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

Ventilation design choices influence the indoor air quality and comfort of the occupants. Computational fluid dynamics (CFD) is frequently used to obtain detailed spatial information which can aid in ventilation design. However, CFD is not commonly used due its computational cost and the high level of numerical expertise required. Fast numerical methods (FNMs), such as voxel-based CFD (vCFD) and coarse grid CFD (cCFD), are potentially more cost-effective and easier to implement. In this research, the speed and accuracy of CFD, vCFD and cCFD are compared for a displacement ventilation case. The FNMs are shown to be at least three orders of magnitude faster. CFD yields more accurate results but both vCFD and cCFD capture flow characteristics of the displacement ventilation case. The results suggest that the integration of FNMs in the early design phase may improve ventilation design quality at an acceptable cost.

Original language	English
Title of host publication	17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022
Publisher	International Society of Indoor Air Quality and Climate (ISIAQ)
Pages	982-989
Publication status	Published - 12 Jun 2022
Event	17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022 - Kuopio, Finland Duration: 12 Jun 2022 → 16 Jun 2022

Conference

Conference	17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022
Country/Territory	Finland
City	Kuopio
Period	12/06/22 → 16/06/22

Bibliographical note

Funding Information:
The authors gratefully acknowledge the partnership with ANSYS. The authors acknowledge the support of the Flemish Agency for Innovation and Entrepreneurship (VLAIO) in the Flux50 project Smart Ventilation (HBC.2020.2520).

Publisher Copyright:
© 2022 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022. All rights reserved.

Funding

The authors gratefully acknowledge the partnership with ANSYS. The authors acknowledge the support of the Flemish Agency for Innovation and Entrepreneurship (VLAIO) in the Flux50 project Smart Ventilation (HBC.2020.2520).

Keywords

computational fluid dynamics
Fast numerical methods
mesh-based modeling
ventilation design
voxel-based modeling

Access to Document

https://www.isiaq.org/conference_proceedings.php

Cite this

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title = "Comparing Speed and Accuracy of Fast Alternatives to CFD for Ventilation Design",

abstract = "Ventilation design choices influence the indoor air quality and comfort of the occupants. Computational fluid dynamics (CFD) is frequently used to obtain detailed spatial information which can aid in ventilation design. However, CFD is not commonly used due its computational cost and the high level of numerical expertise required. Fast numerical methods (FNMs), such as voxel-based CFD (vCFD) and coarse grid CFD (cCFD), are potentially more cost-effective and easier to implement. In this research, the speed and accuracy of CFD, vCFD and cCFD are compared for a displacement ventilation case. The FNMs are shown to be at least three orders of magnitude faster. CFD yields more accurate results but both vCFD and cCFD capture flow characteristics of the displacement ventilation case. The results suggest that the integration of FNMs in the early design phase may improve ventilation design quality at an acceptable cost.",

keywords = "computational fluid dynamics, Fast numerical methods, mesh-based modeling, ventilation design, voxel-based modeling",

author = "Eugene Mamulova and \{van Hooff\}, Twan",

note = "Funding Information: The authors gratefully acknowledge the partnership with ANSYS. The authors acknowledge the support of the Flemish Agency for Innovation and Entrepreneurship (VLAIO) in the Flux50 project Smart Ventilation (HBC.2020.2520). Publisher Copyright: {\textcopyright} 2022 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022. All rights reserved.; 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022 ; Conference date: 12-06-2022 Through 16-06-2022",

year = "2022",

month = jun,

day = "12",

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pages = "982--989",

booktitle = "17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022",

publisher = "International Society of Indoor Air Quality and Climate (ISIAQ)",

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Mamulova, E & van Hooff, T 2022, Comparing Speed and Accuracy of Fast Alternatives to CFD for Ventilation Design. in 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022. International Society of Indoor Air Quality and Climate (ISIAQ), pp. 982-989, 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022, Kuopio, Finland, 12/06/22. <https://www.isiaq.org/conference_proceedings.php>

Comparing Speed and Accuracy of Fast Alternatives to CFD for Ventilation Design. / Mamulova, Eugene ; van Hooff, Twan.
17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022. International Society of Indoor Air Quality and Climate (ISIAQ), 2022. p. 982-989.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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T1 - Comparing Speed and Accuracy of Fast Alternatives to CFD for Ventilation Design

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N1 - Funding Information: The authors gratefully acknowledge the partnership with ANSYS. The authors acknowledge the support of the Flemish Agency for Innovation and Entrepreneurship (VLAIO) in the Flux50 project Smart Ventilation (HBC.2020.2520). Publisher Copyright: © 2022 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022. All rights reserved.

PY - 2022/6/12

Y1 - 2022/6/12

N2 - Ventilation design choices influence the indoor air quality and comfort of the occupants. Computational fluid dynamics (CFD) is frequently used to obtain detailed spatial information which can aid in ventilation design. However, CFD is not commonly used due its computational cost and the high level of numerical expertise required. Fast numerical methods (FNMs), such as voxel-based CFD (vCFD) and coarse grid CFD (cCFD), are potentially more cost-effective and easier to implement. In this research, the speed and accuracy of CFD, vCFD and cCFD are compared for a displacement ventilation case. The FNMs are shown to be at least three orders of magnitude faster. CFD yields more accurate results but both vCFD and cCFD capture flow characteristics of the displacement ventilation case. The results suggest that the integration of FNMs in the early design phase may improve ventilation design quality at an acceptable cost.

AB - Ventilation design choices influence the indoor air quality and comfort of the occupants. Computational fluid dynamics (CFD) is frequently used to obtain detailed spatial information which can aid in ventilation design. However, CFD is not commonly used due its computational cost and the high level of numerical expertise required. Fast numerical methods (FNMs), such as voxel-based CFD (vCFD) and coarse grid CFD (cCFD), are potentially more cost-effective and easier to implement. In this research, the speed and accuracy of CFD, vCFD and cCFD are compared for a displacement ventilation case. The FNMs are shown to be at least three orders of magnitude faster. CFD yields more accurate results but both vCFD and cCFD capture flow characteristics of the displacement ventilation case. The results suggest that the integration of FNMs in the early design phase may improve ventilation design quality at an acceptable cost.

KW - computational fluid dynamics

KW - Fast numerical methods

KW - mesh-based modeling

KW - ventilation design

KW - voxel-based modeling

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M3 - Conference contribution

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EP - 989

BT - 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022

PB - International Society of Indoor Air Quality and Climate (ISIAQ)

T2 - 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022

Y2 - 12 June 2022 through 16 June 2022

ER -

Comparing Speed and Accuracy of Fast Alternatives to CFD for Ventilation Design

Abstract

Conference

Bibliographical note

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Keywords

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