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

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Researchers

Research units

  • RWTH Aachen University, Aachen
  • Turku University of Applied Sciences
  • Nanjing Tech University

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.

Details

Original languageEnglish
Title of host publicationClima 2019 Congress, Bucharest, Romania May 26-29, 2019
Subtitle of host publicationE3S Web of Conferences 111, 01029 (2019)
EditorsS. I. Tanabe, H. Zhang, J. Kurnitski, M. C. Gameiro da Silva, I. Nastase, P. Wargocki, G. Cao, L. Mazzarela, C. Inard
Publication statusPublished - 13 Aug 2019
MoE publication typeA4 Article in a conference publication
EventREHVA World Congress - Bucharest, Romania
Duration: 26 May 201929 May 2019
Conference number: 13

Publication series

NameE3S web of conferences
PublisherEDP Sciences
Volume111
ISSN (Print)2555-0403

Conference

ConferenceREHVA World Congress
Abbreviated titleCLIMA
CountryRomania
CityBucharest
Period26/05/201929/05/2019

    Research areas

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

ID: 35037512