Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment

Sami Lestinen; Mark Wesseling; Risto Kosonen; Hannu Koskela; Dirk Müller

doi:10.1051/e3sconf/201911101029

Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment

Sami Lestinen
, Mark Wesseling
, Risto Kosonen
, Hannu Koskela
, Dirk Müller

Department of Energy and Mechanical Engineering

RWTH Aachen University
Turku University of Applied Sciences
Nanjing Tech University

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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Abstract

Healthy, comfortable and intelligent indoor environment is a key objective in comprehensive well-being. This is also a main target of advanced HVAC-technology. In indoor environments, air distribution plays a major role while providing clean air to occupants. Therefore, investigating ventilation jets is an essential matter. In this study, the main objective was to improve knowledge on numerical modeling and airflow characteristics. In addition, the reliability of modeling methods were investigated. The experiments were carried out in a test room by using omnidirectional anemometers. The planar air jets were supplied below the ceiling from the opposite long-side walls. The exhaust openings were correspondingly near the floor. Isothermal and incompressible viscous airflow was simulated by using RANS, URANS, DES (SST-k-ω - LES) and SBES (SST-k-ω - LES) methods. The results show that modeling method has considerable effects on the predicted airflow field. However, the study indicates that correctly implemented numerical modeling may predict well the averaged airflow characteristics. Furthermore, the unsteady simulation allows airflows to fluctuate reasonably. In addition, SBES and DES methods were more sensitive in generating the airflow fluctuations than URANS. A recommendation is to carefully test and choose a modeling method for indoor airflows.

Original language	English
Title of host publication	Clima 2019 Congress, Bucharest, Romania May 26-29, 2019
Subtitle of host publication	E3S Web of Conferences 111, 01029 (2019)
Editors	S. I. Tanabe, H. Zhang, J. Kurnitski, M. C. Gameiro da Silva, I. Nastase, P. Wargocki, G. Cao, L. Mazzarela, C. Inard
Publisher	EDP Sciences
Chapter	Advanced HVAC&R&S Technology
DOIs	https://doi.org/10.1051/e3sconf/201911101029
Publication status	Published - 13 Aug 2019
MoE publication type	A4 Conference publication
Event	REHVA World Congress - Bucharest, Romania Duration: 26 May 2019 → 29 May 2019 Conference number: 13

Publication series

Name	E3S web of conferences
Publisher	EDP Sciences
Volume	111
ISSN (Print)	2555-0403

Conference

Conference	REHVA World Congress
Abbreviated title	CLIMA
Country/Territory	Romania
City	Bucharest
Period	26/05/2019 → 29/05/2019

Keywords

airflow characteristics
airflow interaction
turbulence modeling
URANS
DES
SBES
indoor airflows
Indoor environment

Access to Document

10.1051/e3sconf/201911101029

e3sconf_clima2019_01029Final published version, 3.76 MBLicence: CC BY

Cite this

Lestinen, S., Wesseling, M., Kosonen, R., Koskela, H., & Müller, D. (2019). Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment. In S. I. Tanabe, H. Zhang, J. Kurnitski, M. C. Gameiro da Silva, I. Nastase, P. Wargocki, G. Cao, L. Mazzarela, & C. Inard (Eds.), Clima 2019 Congress, Bucharest, Romania May 26-29, 2019: E3S Web of Conferences 111, 01029 (2019) Article 01029 (E3S web of conferences; Vol. 111). EDP Sciences. https://doi.org/10.1051/e3sconf/201911101029

Lestinen, Sami ; Wesseling, Mark ; Kosonen, Risto et al. / Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment. Clima 2019 Congress, Bucharest, Romania May 26-29, 2019: E3S Web of Conferences 111, 01029 (2019). editor / S. I. Tanabe ; H. Zhang ; J. Kurnitski ; M. C. Gameiro da Silva ; I. Nastase ; P. Wargocki ; G. Cao ; L. Mazzarela ; C. Inard. EDP Sciences, 2019. (E3S web of conferences).

@inproceedings{4287a54b36ab4669bbc6cb3ec42860a4,

title = "Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment",

abstract = "Healthy, comfortable and intelligent indoor environment is a key objective in comprehensive well-being. This is also a main target of advanced HVAC-technology. In indoor environments, air distribution plays a major role while providing clean air to occupants. Therefore, investigating ventilation jets is an essential matter. In this study, the main objective was to improve knowledge on numerical modeling and airflow characteristics. In addition, the reliability of modeling methods were investigated. The experiments were carried out in a test room by using omnidirectional anemometers. The planar air jets were supplied below the ceiling from the opposite long-side walls. The exhaust openings were correspondingly near the floor. Isothermal and incompressible viscous airflow was simulated by using RANS, URANS, DES (SST-k-ω - LES) and SBES (SST-k-ω - LES) methods. The results show that modeling method has considerable effects on the predicted airflow field. However, the study indicates that correctly implemented numerical modeling may predict well the averaged airflow characteristics. Furthermore, the unsteady simulation allows airflows to fluctuate reasonably. In addition, SBES and DES methods were more sensitive in generating the airflow fluctuations than URANS. A recommendation is to carefully test and choose a modeling method for indoor airflows.",

keywords = "airflow characteristics, airflow interaction, turbulence modeling, URANS, DES, SBES, indoor airflows, Indoor environment",

author = "Sami Lestinen and Mark Wesseling and Risto Kosonen and Hannu Koskela and Dirk M{\"u}ller",

year = "2019",

month = aug,

day = "13",

doi = "10.1051/e3sconf/201911101029",

language = "English",

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publisher = "EDP Sciences",

editor = "Tanabe, \{S. I. \} and H. Zhang and J. Kurnitski and \{Gameiro da Silva\}, \{M. C.\} and I. Nastase and P. Wargocki and G. Cao and L. Mazzarela and C. Inard",

booktitle = "Clima 2019 Congress, Bucharest, Romania May 26-29, 2019",

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note = "REHVA World Congress, CLIMA ; Conference date: 26-05-2019 Through 29-05-2019",

}

Lestinen, S, Wesseling, M, Kosonen, R, Koskela, H & Müller, D 2019, Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment. in SI Tanabe, H Zhang, J Kurnitski, MC Gameiro da Silva, I Nastase, P Wargocki, G Cao, L Mazzarela & C Inard (eds), Clima 2019 Congress, Bucharest, Romania May 26-29, 2019: E3S Web of Conferences 111, 01029 (2019)., 01029, E3S web of conferences, vol. 111, EDP Sciences, REHVA World Congress, Bucharest, Romania, 26/05/2019. https://doi.org/10.1051/e3sconf/201911101029

Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment. / Lestinen, Sami; Wesseling, Mark; Kosonen, Risto et al.
Clima 2019 Congress, Bucharest, Romania May 26-29, 2019: E3S Web of Conferences 111, 01029 (2019). ed. / S. I. Tanabe; H. Zhang; J. Kurnitski; M. C. Gameiro da Silva; I. Nastase; P. Wargocki; G. Cao; L. Mazzarela; C. Inard. EDP Sciences, 2019. 01029 (E3S web of conferences; Vol. 111).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment

AU - Lestinen, Sami

AU - Wesseling, Mark

AU - Kosonen, Risto

AU - Koskela, Hannu

AU - Müller, Dirk

N1 - Conference code: 13

PY - 2019/8/13

Y1 - 2019/8/13

N2 - Healthy, comfortable and intelligent indoor environment is a key objective in comprehensive well-being. This is also a main target of advanced HVAC-technology. In indoor environments, air distribution plays a major role while providing clean air to occupants. Therefore, investigating ventilation jets is an essential matter. In this study, the main objective was to improve knowledge on numerical modeling and airflow characteristics. In addition, the reliability of modeling methods were investigated. The experiments were carried out in a test room by using omnidirectional anemometers. The planar air jets were supplied below the ceiling from the opposite long-side walls. The exhaust openings were correspondingly near the floor. Isothermal and incompressible viscous airflow was simulated by using RANS, URANS, DES (SST-k-ω - LES) and SBES (SST-k-ω - LES) methods. The results show that modeling method has considerable effects on the predicted airflow field. However, the study indicates that correctly implemented numerical modeling may predict well the averaged airflow characteristics. Furthermore, the unsteady simulation allows airflows to fluctuate reasonably. In addition, SBES and DES methods were more sensitive in generating the airflow fluctuations than URANS. A recommendation is to carefully test and choose a modeling method for indoor airflows.

AB - Healthy, comfortable and intelligent indoor environment is a key objective in comprehensive well-being. This is also a main target of advanced HVAC-technology. In indoor environments, air distribution plays a major role while providing clean air to occupants. Therefore, investigating ventilation jets is an essential matter. In this study, the main objective was to improve knowledge on numerical modeling and airflow characteristics. In addition, the reliability of modeling methods were investigated. The experiments were carried out in a test room by using omnidirectional anemometers. The planar air jets were supplied below the ceiling from the opposite long-side walls. The exhaust openings were correspondingly near the floor. Isothermal and incompressible viscous airflow was simulated by using RANS, URANS, DES (SST-k-ω - LES) and SBES (SST-k-ω - LES) methods. The results show that modeling method has considerable effects on the predicted airflow field. However, the study indicates that correctly implemented numerical modeling may predict well the averaged airflow characteristics. Furthermore, the unsteady simulation allows airflows to fluctuate reasonably. In addition, SBES and DES methods were more sensitive in generating the airflow fluctuations than URANS. A recommendation is to carefully test and choose a modeling method for indoor airflows.

KW - airflow characteristics

KW - airflow interaction

KW - turbulence modeling

KW - URANS

KW - DES

KW - SBES

KW - indoor airflows

KW - Indoor environment

U2 - 10.1051/e3sconf/201911101029

DO - 10.1051/e3sconf/201911101029

M3 - Conference article in proceedings

T3 - E3S web of conferences

BT - Clima 2019 Congress, Bucharest, Romania May 26-29, 2019

A2 - Tanabe, S. I.

A2 - Zhang, H.

A2 - Kurnitski, J.

A2 - Gameiro da Silva, M. C.

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A2 - Wargocki, P.

A2 - Cao, G.

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PB - EDP Sciences

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Lestinen S, Wesseling M, Kosonen R, Koskela H, Müller D. Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment. In Tanabe SI, Zhang H, Kurnitski J, Gameiro da Silva MC, Nastase I, Wargocki P, Cao G, Mazzarela L, Inard C, editors, Clima 2019 Congress, Bucharest, Romania May 26-29, 2019: E3S Web of Conferences 111, 01029 (2019). EDP Sciences. 2019. 01029. (E3S web of conferences). doi: 10.1051/e3sconf/201911101029

Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment

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