Numerical Prediction of Airflow in a Room with Ceiling-Mounted Obstacles

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In ventilated rooms the air inlet device is often placed close to the ceiling. The air inlet will form a wall jet or a reattached wall jet. The wall jet may be disturbed by ceilingmounted obstacles such as light fittings or ceiling beams which, in some cases, can cause the air jet to be deflected into the occupied zone.

In this paper numerical prediction of two-dimensional airflow in a room with ceilingmounted obstacles is compared with the experimental results from the literature. The first part of the paper deals with velocity profiles in a room with non- deflected flow, where it is found that calculated velocity profiles agree very well with experimental results. Thereafter the critical height of an obstacle which deflects the air jet is examined.
Original languageEnglish
Place of PublicationAalborg
PublisherDept. of Building Technology and Structural Engineering, Aalborg University
Number of pages8
Publication statusPublished - 1992
SeriesIndoor Environmental Technology

Bibliographical note

Presented at ROOMVENT'92, Third Int. Conf. on Air Distribution in Rooms, Aalborg, Denmark, September 1992.

PDF for print: 16 pp.


  • Airflow
  • Simulation Obstacles
  • Isothermal


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