International Journal of Mathematical, Engineering and Management Sciences Vol. 4, No. 5, 1154–1168, 2019 https://dx.doi.org/10.33889/IJMEMS.2019.4.5-091 1154 Assessment of Indoor Air Quality in Buildings using CFD: A Brief Review Venu Shree Department of Architecture National Institute of Technology Hamirpur, 177005, Himachal Pradesh, India Corresponding author: venushree80@gmail.com Bhanu M. Marwaha Department of Architecture National Institute of Technology Hamirpur, 177005, Himachal Pradesh, India Pamita Awasthi Department of Chemistry National Institute of Technology Hamirpur, 177005, Himachal Pradesh, India (Received January 15, 2019; Accepted June 1, 2019) Abstract The building provides shelter to live and most people spend their 85-90% time indoors. Therefore, it is quite important to ensure that the condition of the indoor environment is healthy for its living being. There are a number of methods to evaluate indoor air pollution of built spaces by performing experiments or doing it computationally. In this study, a review of computational studies carried out to evaluate the impact of different parameters like airflow pattern, indoor and outdoor contaminant concentrations etc., on indoor air quality (IAQ) of different type of buildings was done. Some commonly used software’s for the study of IAQ were also discussed. Keywords- Indoor air, Computation, Building, CFD. 1. Introduction Actually, cooling or heating of a built space to maintain indoor thermal comfort is a major source that accounts for around 60–70% of building energy consumption. Nowadays, the building sector alone is accounted for nearly 40% of annual energy consumption (world). At present, around 31 cities worldwide are having a population of more than 10 million (United Nations, 2016) and many of them are located in developing and poor countries and they are characterized by enhanced pollution levels (air). Buildings should provide a good indoor environment, which allows occupants to do various activities (Wang et al., 2017). However, continuous effort in reducing building energy consumption is required due to the depletion of fossil energy resources along with the effect of global warming (Hong et al., 2017). Good IAQ with less energy usage is the main objective of building users and designers. Energy usage and comfort levels are highly dependent on incoming fresh air. Architects and designers had started making building more air tight in order to minimize the heating and cooling load requirements. This reduced ventilation rate leads to indoor air pollution. Natural ventilation helps to improve IAQ through dilution of indoor air pollutants. The study of Indoor Air Pollution (IAP) has emerged into a new discipline which requires knowledge in many areas. It deals with the principle of species concentration, fluid mechanics, heat transfer etc.