Modeling Smoke Visibility In CFD

Simulation of Visibility in Smoke Laden Environments

Exposure to the products of combustion, both particulate smoke and gaseous, rather than to the fire itself, is the most significant cause of injury and death in fires. The exposure time of individuals in a smoke environment depends upon their speed of movement and the direction they choose to travel, nominally towards a safe exit. Consequently in the fire safe design of modern buildings, the pr...

Exit Signs in Smoke: Design Parameters for Greater Visibility

A review of regulations and specifications for internally illuminated exit signs recommended or enforced by various sanctioning bodies in Canada, Great Britain and elsewhere reveals omissions and inconsistencies which may compromise the safety of building occupants in smoke. Since these problems are partly due to lack of conclusive research, a controlled psychophysical experiment was conducted ...

Turbulence Modeling of Complex Flows in CFD

In the last two decades of the 20th century, the world had witnessed the enormous increase in the computational resources. This has brought in the tremendous increase in human knowledge and understanding of complex phenomenon, like turbulence and its modeling among others. The technical development has brought new challenges in engineering design. Whether we limit ourselves to the earthly matte...

CFD Resource Decisions in Particle Transport Modeling

CFD modeling of an ion-drag micropump

A two-dimensional numerical simulation study has been performed to model an electrohydrodynamic (EHD) micropump. The micropump consists of an array of interdigitated electrodes along the top and bottom of the micropump channel. The focus of the simulations was to study the effects of electrode gap, stage gap, channel height, and applied voltage. The numerical results were first validated with e...