Influence of geometry of a a computer simulated person on contaminant distribution and personal exposure.

By means of CFD, the results of that study express a significant influence of Computer Simulated Person geometry on local flow pattern and on personal exposure to contaminants released from the floor surface.

Evaluation of CFD-modelling methods for air diffusers

The main objective of this paper is to describe methods for characterising air diffusers for CFD simulation of the room airflows. As a basis of work, a circular diffuser was used for working out and testing those methods.

Numerical study of partition-type FCU personal air-conditioning system

The intention of the authors is to find a proper air conditionning system to achieve higher IAQ environment.They consider a new air-conditioning system that uses both a Partition-type Fan-Coil Units system (PFCUs) with a Dedicated Outdoor Air System (DOAS).

Experimental and numerical study on simultaneous temperature and humidity distributions

This paper deals first with experimental measurement performed in a test chamber to investigate the characteristics of temperature and moisture distributions. The effect of moisture accumulation in building material is studied too. Then a new approach is introduced to describe the simultaneous heat and moisture transfer. The results has been compared with a CFD model.

Modeling of complex air diffuser for CFD simulation. Part 1 : experiment and numerical simulation of a complex air diffuser under isothermal condition

Part 1 of this paper gives first an outline of the experiment (full-scale measurement of the air velocity carried under isothermal condition), then discusses the 2 modeling methods - the BOX method and the P.V. method - used for CFD simulation.The results of calculations with the 2 methods showed good agreement with the experimental data.

Flow behaviour in a ventilated room - Measurements and simulations -

Disturbances from the surroundind environment and boundary conditions can influence very much the flow pattern , particles concentration and temperature distribution in a room.This report confirms the importance of working with measurements and simulations in parallel. Simulations of indoor air quality need to be validated . Guidelines on how to combine results are discussed in the paper.

Predicting volatile organic compounds concentration in residential buildings (Part 2 : application of model)

Using the model developed in part 1 of this paper, the influence of material kinds, ventilation and air-cleaning device on VOC concentration in room is studied. The conclusion is that ventilation rate plays a very important role on VOCs concentration, but it affects little on VOCs emission rate.

Modeling chemical reactions in the indoor environment by CFD

The study used CFD to examine reactions between ozone and terpenes in a room under 4 conditions. The study indicates that chemical reactions can significantly alter the concentration of air pollutants, an imperfect mixing may result in reactant and product concentrations significantly different from those predicted by the model that assumes fully mixed conditions.

Simulation tool for indoor air quality improvement in a covered swimming pool

This study consisted first in a sampling campaign that has shown the important levels of NCL3 encountered in swimming pools. Then a simulation of the NCL3 dispersion was conducted wtih the following simulation tools : TRNSYS (thermal simulation) and FLUENT (CFD simulation).

Numerical calculation of view factors and radiant temperature for complex room geometry

This method enables the determination of the influence of heating source characteristics on mean radiant temperature for composite room surfaces, as well as on thermal comfort and discomfort. A maximal possible thermal comfort area can be achieved with the determination of the best interactive influence between the building structure and its heating system.

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