Computational Fluid Dynamics (CFD) Analysis of Ultraviolet Germicidal (UV-C) to Control the Probability of Infection due to Transmission of Airborne Pathogens

Kishor Khankari, William Bahnfleth

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The wavelength band of 200-280 nm of UV-C radiation generated by the Ultraviolet Germicidal Irradiation (UVGI) system can destroy the reproduction ability of microorganisms. Several factors related to UV fixtures, HVAC layout, and the resulting airflow flow patterns can affect the performance of upper-room UVGI applications. With the help of Computational Fluid Dynamics (CFD) analyses, this study systematically evaluates the impact of UV-C intensities on the effectiveness of an upper room UVGI system. It shows that the addition of even a small amount of UV-C energy in the upper region of space can significantly reduce the probability of infection as predicted by the Wells-Riley model. Increasing the UV-C output shows a further reduction in the infection probability, although with a diminishing impact. A further investigation is necessary to evaluate the effect of airflow patterns on the performance of UVGI systems. These studies demonstrate that CFD analyses can help optimize the performance of UVGI systems to minimize the probability of infection in indoor spaces.

Original languageEnglish (US)
Title of host publication2022 ASHRAE Winter Conference
Number of pages8
ISBN (Electronic)9781955516068
StatePublished - 2022
Event2022 ASHRAE Virtual Winter Conference - Virtual, Online
Duration: Jan 29 2022Feb 2 2022

Publication series

NameASHRAE Transactions
ISSN (Print)0001-2505


Conference2022 ASHRAE Virtual Winter Conference
CityVirtual, Online

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

Cite this