Modelling complex inlet geometries in CFD - applied to air flow in ventilated rooms.

Modern inlet devices applied in the field of ventilation of rooms are getting more complex in terms of geometry in order to fulfil the demand for thermal comfort of the occupants in the room and in order to decrease the energy consumption This expresses the need for more precise calculation of the flow jield. In order to apply CFD for this purpose it is essential to be able to model the inlet conditions precisely and effectively, in a way which is comprehensible to the manufacturer of inlet devices and in a way which can be coped by the computer resources. In this paper a universal method is presented and tested. The method is based upon three dimensional - and radial wall jet theory and upon dimer specific experimental data Simulations are held up against a more basic method and full scale memrements. The inlet model is evaluaed in terms of result, computational effort and applicability. Promising results are obtained