Numerical investigations, using Reynolds Averaged Navier-Stokes (RANS) based methodology, were carried out to determine the characteristics of the velocity field in a thin wall cavity using rectangular slots with free ventilation area of about 3100 mm 2. The computation of the cavity flow in this study was based on three different flow modes: the pressure-driven, the buoyancy-driven and the combined pressure- and buoyancy-driven flow modes in a single-sided ventilation approach. The numerical results obtained with the computational fluid dynamics fluent package using the standard k-ε turbulence model show that a maximum velocity of about 6 m/s was obtained for ambient temperature ranging from -20 to 20°C under the buoyancy-driven flow mode. This velocity of the cavity flow under this flow mode was shown to be significantly greater than a maximum velocity of about 1.5 m/s obtained under the pressure-driven and the combined flow modes. The predicted velocity fields for all flow modes employed in this study are characterized by multi-cellular patterns of airflow. © 2006-2011 Asian Research Publishing Network (ARPN).
|Number of pages||8|
|Journal||Journal of Engineering and Applied Sciences|
|Publication status||Published - Oct 2011|
- Atmospheric boundary layer
- cavity wall
- Velocity field
- Ventilation slots