A numerical investigation has been made on the effect of thermal and mass buoyancy forces on the development of laminar mixed convection between vertical parallel plates with uniform wall heat and mass fluxes. Some parameters such as velocity, temperature and concentration are presented and their incidence on heat and mass transfer between the plates is discussed for both positive and negative values of the buoyancy ratio. Results and discussions are presented.
That study aims at proving that the use of low-polluting building materials leads to an improvement of the air quality. For the experiment the space of an office qualified as low polluting has been altered by introducing indoor pollution sources (such as linoleum, wooden shelves, books and paper documents) and an outdoor air supply rate altered too. The concentrations of VOCs were measured in those different conditions along with the perception of the air quality assessed by a panel of 30 female subjects.
A large opening has to be designed at the bottom of a Void (light-well in high-rise apartment building) in order to keep the indoor air quality (IAQ) acceptable, because of the exhaust gas discharge of the gas water-heater. This paper presents a simple calculation method of the ventilation rate induced by wind force and thermal buoyancy through openings at the bottom, along with heat sources such as water-heaters.
There is a relationship between geometric room parameters and the air flow patterns produced by mechanical ventilation systems. Experimental measurements of indoor air flows in a one-tenth sub-scale model room were made and compared to numerical simulations. The results show how obstructions can influence the air flow and contaminant transport in a room.
Experiments were operated to estimate the influence of temperature and humidity on the perception of odours in the air by trained and untrained persons .
Dynamic simulation calculations were operated using TRNSYS software applied to a low energy house, fitted with a balanced mechanical ventilation system with heat recovery.
This paper presents the modeling of convective flows based on lattice Boltzmann methods in combination with a large eddy turbulence model. The used example is complex and three-dimensional.
For hospitals, air filtration is obviously a very important point in the control of nosocomial infections. A strategy and reference points are presented .
Natural convection in a heated vertical duct is studied in this paper.First experimental study and computer simulations were performed in a scaled down laboratory model. Then temperature fields and average temperatures were obtained at all levels of the multi-storey building.
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