Abstract
Numerical simulation of airflow and transport of neutrally buoyant bubbles in a slot-ventilated airspace was conducted. Airflow was simulated using the k-epsilon turbulence model. Transport of neutrally buoyant bubbles was calculated using the equation of motion of a particle. Scale model experiments were also performed. Air velocities were measured using a three-dimensional hot-film anemometer. Neutrally buoyant bubbles were introduced at selected locations and tracked. Comparison between numerical simulation and experimental results showed good correspondence in velocity fields and in bubble trajectories, fates, and residence times. Thus, this work demonstrated the suitability of using the solution procedure to model bubble transport in slot-inlet ventilated airspaces. Numerical simulation was then used to predict the transport of 5 mum particles. Results did not show any significant difference between 3mm bubbles and 5 mum particles (rho "SUB p" =1500kg/m "SUP 3" ) on predicted fates and residence times indicating that 3mm neutrally buoyant bubbles can be used to model 5 mum particles. (Authors)
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1449-1459 |
| Number of pages | 11 |
| Journal | Transactions - American Society of Agricultural Engineers |
| Volume | 36 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1993 |
| Externally published | Yes |
ASJC Scopus subject areas
- Agricultural and Biological Sciences (miscellaneous)