(734) 327 4079 info@ansight.com
AnSight’s Solutions for COVID-19

Aerodynamic Containment Can Reduce Indoor Spread of Infectious Aerosols



Kishor Khankari


Good ventilation design should ensure that clean filtered air is properly distributed while contaminated air is removed. CFD analyses can help engineers achieve both goals. This article demonstrates how aerodynamic containment layout of the HVAC diffusers and returns can help reduce the spread of airborne pathogens.

The aerodynamic containment layout with the distributed supply diffusers helps with better distribution of clean air. Distributed return grilles provide a path of least resistance for the contaminated air to leave the space, and the symmetric layout of supply and return grilles forms airflow envelopes that promote local containment of the airborne contaminants. The average value of the probability of infection in the breathing plane reduced from 11.3% to 9.1% with aerodynamic containment. The Spread Index – a metric of spread of pathogens in a space reduced from 49.4% to 39.3%.
This article provides guidance on how to create an aerodynamic containment HVAC layout.

Fill the following form to download

    About the author

    Dr. Kishor Khankari

    ASHRAE Fellow, ASHRAE Distinguished Lecturer

    Dr Kishor Khankari is the founder of AnSight LLC. As a specialist in Computational Fluid Dynamics (CFD), his passion for solving engineering problems and providing sound scientific solutions has led to innovations and optimized designs in the industry.

    A noted expert in his field, he has a Ph.D. from the University of Minnesota and has published in several technical journals and trade magazines. As a well sought-after speaker Dr. Khankari makes regular presentations in various technical conferences and professional meetings worldwide.

    Recent Posts

    Ventilation Guidance for Residential Kitchen with Gas Stove

    Recently the residential gas stoves were in the News due to the generation of pollutants during their operation. Cooking activities as well as the combustion of natural gas through gas stove burners produce several indoor pollutants. Exhausting these pollutants from...

    CFD Analysis of Residential Kitchen Ventilation with Gas Stove

    Proper ventilation of the kitchen is essential to reduce the occupant exposure to various pollutants generated during the cooking and the combustion of natural gas through the gas stove burners. Several parameters related to the design and operation can affect the...

    CFD Analysis of Demand Control Ventilation for Laboratories

    What is Demand Control Ventilation (DCV)? Often high air change rates per hour (ACH) are specified for laboratories to meet the goal of ventilation. The ACH numbers specified are mostly consensuses based on simplistic approaches of perfect mixing of contaminants with...

    CFD Analysis Evaluates Efficacy of Reactive Air Cleaning Technology

    What is reactive air cleaning? Reactive air cleaning involves the release of reactive agents in the room to actively mitigate airborne pathogens and other pollutants. Unlike traditional dilution ventilation in which the concentration of the airborne pathogens in the...