Aerosol penetration through a model transport system: Comparison of theory and experiment

Journal Article · Sun Sep 01 00:00:00 EDT 1991 · Environmental Science and Technology; (United States)

DOI:https://doi.org/10.1021/es00021a007· OSTI ID:5392462

McFarland, A R; Wong, F S; Anand, N K; Ortiz, C A ^[1]

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1. Texas A and M Univ., College Station (United States)

Numerical predictions were made of aerosol penetration through a model transport system. A physical model of the system was constructed and tested in an aerosol wind tunnel to obtain comparative data. The system was 26.6 mm in diameter and consisted of an inlet and three straight sections (oriented horizontally, vertically, and at 45{degree}). Particle sizes covered a range in which losses were primarily caused by inertial and gravitational effects (3-25 {mu}m aerodynamic equivalent diameter (AED)). Tests were conducted at two flow rates (70 and 130 l/min) and two inlet orientations (parallel and perpendicular to the free stream). Wind speed was 3 m/s for all test cases. The cut points for aerosol penetration through the experimental model vis-a-vis the numerical results are as follows: At a flow rate of 70 l/min with the inlet at 0{degree}, the experimentally observed cut point was 16.2 {mu}m AED while the numerically predicted value was 18.2 {mu}m AED while the numerically predicted value was 18.2 {mu}m AED. At 130 l/min and 0{degree}, the experimental cut point was 12.8 {mu}m AED as compared with a numerically value of 13.7 {mu}m AED. At 70l/min and a 90{degree}, the experimental cut point was 12.0 {mu}m AED while the numerically calculated value was 11.1 {mu}m AED. Slopes of the experimental penetration curves are somewhat steeper than the numerically predicted counterparts.

• OSTI ID: 5392462
• Journal Information: Environmental Science and Technology; (United States), Vol. 25:9; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AEROSOLS
AERODYNAMICS
DIFFUSION
EXPERIMENTAL DATA
FLOW RATE
FUNCTIONAL MODELS
MATHEMATICAL MODELS
ORIENTATION
PARTICLE SIZE
PERFORMANCE TESTING
RADIOACTIVE AEROSOLS
SIMULATION
WIND TUNNELS
COLLOIDS
DATA
DISPERSIONS
FLUID MECHANICS
INFORMATION
MECHANICS
NUMERICAL DATA
SIZE
SOLS
TESTING
TUNNELS
UNDERGROUND FACILITIES
540110*
540130 - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (1990-)