A study was performed to investigate the use of computational fluid dynamics (CFD) coupled
with a fluence rate model to determine the bias in ultraviolet (UV) biodosimetry measurements using
inactivation of a challenge microbe instead of the target pathogen, termed the reduction
equivalent fluence (REF) bias. Simulations were performed using two fluence rate models:
RADial Line Source Integration (RAD-LSI) and UVCalc3D. CFD UV models were carried out
in several closed conduit UV reactors using either mono- or polychromatic lamps. The REF bias
was computed using the predicted fluence distribution from a Lagrangian particle tracking
routine and compared with the REF bias computed using the EPA UV disinfection guidance
manual (UVDGM) approach. Overall, the results show that the REF bias using the predicted
fluence distribution for the specific UV reactor was generally 45 to 66 percent of the REF bias
predicted using EPA UVDGM. The REF bias was slightly sensitive to the selected fluence rate
model. Includes 17 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 11/15/2004 |
