Plane Stratified Flow in a Room Ventilated by Displacement Ventilation

Peter Vilhelm Nielsen, J. Nickel, D. J. G. Baron

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearch

Abstract

The air movement in the occupied zone of a room ventilated by displacement ventilation exists as a stratified flow along the floor. This flow can be radial or plane according to the number of wall-mounted diffusers and the room geometry. The paper addresses the situations where plane flow is obtained and a semi-analytical expression for the velocity level in the occupied zone is given. It is shown that the flow has a constant velocity level independent of the distance from the diffuser and that the thickness or length scale of the stratified flow has a tendency to be constant everywhere in the flow. The thickness and the velocity are functions of the Archimedes number.
Original languageEnglish
Title of host publicationProceedings of ROOMVENT 2004, 9th International Conference on Air Distribution in Rooms, September 5-8, 2004, Coimbra, Portugal
EditorsM. C. Gameiro Da Silva
Number of pages6
Publication date2004
ISBN (Print)972-97973-1-5
Publication statusPublished - 2004
EventPlane Stratified Flow in a Room Ventilated by Displacement Ventilation -
Duration: 19 May 2010 → …

Conference

ConferencePlane Stratified Flow in a Room Ventilated by Displacement Ventilation
Period19/05/2010 → …

Fingerprint

stratified flow
ventilation
rooms
diffusers
tendencies
air
geometry

Keywords

  • Displacement Ventilation
  • Plane Flow
  • Stratification
  • Diffuser

Cite this

Nielsen, P. V., Nickel, J., & Baron, D. J. G. (2004). Plane Stratified Flow in a Room Ventilated by Displacement Ventilation. In M. C. G. Da Silva (Ed.), Proceedings of ROOMVENT 2004, 9th International Conference on Air Distribution in Rooms, September 5-8, 2004, Coimbra, Portugal
Nielsen, Peter Vilhelm ; Nickel, J. ; Baron, D. J. G. / Plane Stratified Flow in a Room Ventilated by Displacement Ventilation. Proceedings of ROOMVENT 2004, 9th International Conference on Air Distribution in Rooms, September 5-8, 2004, Coimbra, Portugal. editor / M. C. Gameiro Da Silva. 2004.
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Nielsen, PV, Nickel, J & Baron, DJG 2004, Plane Stratified Flow in a Room Ventilated by Displacement Ventilation. in MCG Da Silva (ed.), Proceedings of ROOMVENT 2004, 9th International Conference on Air Distribution in Rooms, September 5-8, 2004, Coimbra, Portugal. Plane Stratified Flow in a Room Ventilated by Displacement Ventilation, 19/05/2010.

Plane Stratified Flow in a Room Ventilated by Displacement Ventilation. / Nielsen, Peter Vilhelm; Nickel, J.; Baron, D. J. G.

Proceedings of ROOMVENT 2004, 9th International Conference on Air Distribution in Rooms, September 5-8, 2004, Coimbra, Portugal. ed. / M. C. Gameiro Da Silva. 2004.

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearch

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N2 - The air movement in the occupied zone of a room ventilated by displacement ventilation exists as a stratified flow along the floor. This flow can be radial or plane according to the number of wall-mounted diffusers and the room geometry. The paper addresses the situations where plane flow is obtained and a semi-analytical expression for the velocity level in the occupied zone is given. It is shown that the flow has a constant velocity level independent of the distance from the diffuser and that the thickness or length scale of the stratified flow has a tendency to be constant everywhere in the flow. The thickness and the velocity are functions of the Archimedes number.

AB - The air movement in the occupied zone of a room ventilated by displacement ventilation exists as a stratified flow along the floor. This flow can be radial or plane according to the number of wall-mounted diffusers and the room geometry. The paper addresses the situations where plane flow is obtained and a semi-analytical expression for the velocity level in the occupied zone is given. It is shown that the flow has a constant velocity level independent of the distance from the diffuser and that the thickness or length scale of the stratified flow has a tendency to be constant everywhere in the flow. The thickness and the velocity are functions of the Archimedes number.

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KW - Stratification

KW - Diffuser

KW - Displacement Ventilation

KW - Plane Flow

KW - Stratification

KW - Diffuser

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SN - 972-97973-1-5

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Nielsen PV, Nickel J, Baron DJG. Plane Stratified Flow in a Room Ventilated by Displacement Ventilation. In Da Silva MCG, editor, Proceedings of ROOMVENT 2004, 9th International Conference on Air Distribution in Rooms, September 5-8, 2004, Coimbra, Portugal. 2004