Analysis and discussion of the performance of RANS and LES for cross-ventilation flow in a generic enclosure

Twan van Hooff; Bert Blocken; Yoshihide Tominaga

Analysis and discussion of the performance of RANS and LES for cross-ventilation flow in a generic enclosure

Twan van Hooff^*, Bert Blocken, Yoshihide Tominaga

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This abstract shows the results of computational fluid dynamics (CFD) modeling of natural cross-ventilation flow through a generic enclosure using the Reynolds-averaged Navier-Stokes (RANS) and large-eddy simulation (LES) approaches. Natural ventilation can contribute to a reduced cooling demand in summer (ventilative cooling) and can provide fresh outdoor air to buildings throughout the year. To accurately assess natural ventilation flows using CFD, validation studies are imperative. This study shows that steady RANS can provide overall satisfactory results, although discrepancies are present due to the inability to predict unsteady flow features. LES provides more accurate results for velocities and turbulence kinetic energy, however, the volume flow rate through the building is not more accurately predicted than with RANS, while the computational cost is significantly (≈ 80-100) higher.

Original language	English
Title of host publication	15th International Conference on Indoor Air Quality and Climate (INDOOR AIR 2018)
Publisher	International Society of Indoor Air Quality and Climate
Pages	2027-2028
Number of pages	2
Volume	3
ISBN (Electronic)	9781713826514
Publication status	Published - 2018
Event	15th Conference of the International Society of Indoor Air Quality and Climate 2018 - Philadelphia, United States Duration: 22 Jul 2018 → 27 Jul 2018

Conference

Conference	15th Conference of the International Society of Indoor Air Quality and Climate 2018
Abbreviated title	INDOOR AIR 2018
Country/Territory	United States
City	Philadelphia
Period	22/07/18 → 27/07/18

Keywords

Generic enclosure
Natural ventilation modeling
Numerical approaches
Ventilative cooling

ASJC Scopus subject areas

Pollution

Cite this

@inproceedings{07237cde499347768c27a89e2b8d1b6f,

title = "Analysis and discussion of the performance of RANS and LES for cross-ventilation flow in a generic enclosure",

abstract = "This abstract shows the results of computational fluid dynamics (CFD) modeling of natural cross-ventilation flow through a generic enclosure using the Reynolds-averaged Navier-Stokes (RANS) and large-eddy simulation (LES) approaches. Natural ventilation can contribute to a reduced cooling demand in summer (ventilative cooling) and can provide fresh outdoor air to buildings throughout the year. To accurately assess natural ventilation flows using CFD, validation studies are imperative. This study shows that steady RANS can provide overall satisfactory results, although discrepancies are present due to the inability to predict unsteady flow features. LES provides more accurate results for velocities and turbulence kinetic energy, however, the volume flow rate through the building is not more accurately predicted than with RANS, while the computational cost is significantly (≈ 80-100) higher.",

keywords = "Generic enclosure, Natural ventilation modeling, Numerical approaches, Ventilative cooling",

author = "{van Hooff}, Twan and Bert Blocken and Yoshihide Tominaga",

note = "Publisher Copyright: {\textcopyright} 2018 15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018. All rights reserved.; 15th Conference of the International Society of Indoor Air Quality and Climate 2018, INDOOR AIR 2018 ; Conference date: 22-07-2018 Through 27-07-2018",

year = "2018",

language = "English",

volume = "3",

pages = "2027--2028",

booktitle = "15th International Conference on Indoor Air Quality and Climate (INDOOR AIR 2018)",

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

}

van Hooff, T, Blocken, B & Tominaga, Y 2018, Analysis and discussion of the performance of RANS and LES for cross-ventilation flow in a generic enclosure. in 15th International Conference on Indoor Air Quality and Climate (INDOOR AIR 2018). vol. 3, International Society of Indoor Air Quality and Climate, pp. 2027-2028, 15th Conference of the International Society of Indoor Air Quality and Climate 2018, Philadelphia, Pennsylvania, United States, 22/07/18.

Analysis and discussion of the performance of RANS and LES for cross-ventilation flow in a generic enclosure. / van Hooff, Twan; Blocken, Bert; Tominaga, Yoshihide.
15th International Conference on Indoor Air Quality and Climate (INDOOR AIR 2018). Vol. 3 International Society of Indoor Air Quality and Climate, 2018. p. 2027-2028.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Analysis and discussion of the performance of RANS and LES for cross-ventilation flow in a generic enclosure

AU - van Hooff, Twan

AU - Blocken, Bert

AU - Tominaga, Yoshihide

PY - 2018

Y1 - 2018

N2 - This abstract shows the results of computational fluid dynamics (CFD) modeling of natural cross-ventilation flow through a generic enclosure using the Reynolds-averaged Navier-Stokes (RANS) and large-eddy simulation (LES) approaches. Natural ventilation can contribute to a reduced cooling demand in summer (ventilative cooling) and can provide fresh outdoor air to buildings throughout the year. To accurately assess natural ventilation flows using CFD, validation studies are imperative. This study shows that steady RANS can provide overall satisfactory results, although discrepancies are present due to the inability to predict unsteady flow features. LES provides more accurate results for velocities and turbulence kinetic energy, however, the volume flow rate through the building is not more accurately predicted than with RANS, while the computational cost is significantly (≈ 80-100) higher.

AB - This abstract shows the results of computational fluid dynamics (CFD) modeling of natural cross-ventilation flow through a generic enclosure using the Reynolds-averaged Navier-Stokes (RANS) and large-eddy simulation (LES) approaches. Natural ventilation can contribute to a reduced cooling demand in summer (ventilative cooling) and can provide fresh outdoor air to buildings throughout the year. To accurately assess natural ventilation flows using CFD, validation studies are imperative. This study shows that steady RANS can provide overall satisfactory results, although discrepancies are present due to the inability to predict unsteady flow features. LES provides more accurate results for velocities and turbulence kinetic energy, however, the volume flow rate through the building is not more accurately predicted than with RANS, while the computational cost is significantly (≈ 80-100) higher.

KW - Generic enclosure

KW - Natural ventilation modeling

KW - Numerical approaches

KW - Ventilative cooling

UR - http://www.scopus.com/inward/record.url?scp=85105614066&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85105614066

VL - 3

SP - 2027

EP - 2028

BT - 15th International Conference on Indoor Air Quality and Climate (INDOOR AIR 2018)

PB - International Society of Indoor Air Quality and Climate

T2 - 15th Conference of the International Society of Indoor Air Quality and Climate 2018

Y2 - 22 July 2018 through 27 July 2018

ER -

Analysis and discussion of the performance of RANS and LES for cross-ventilation flow in a generic enclosure

Abstract

Conference

Keywords

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this