CFD Analysis of Wind-Driven Natural Ventilation in Building Models

Authors

  • Okafor Chinedu Vincent Nnamdi Azikiwe University Awka, Nigeria
  • Okeke Arinze Uchenna Nnamdi Azikiwe University Awka, Nigeria.
  • Ononye Olisa Roy Federal College of Education (Technical) Asaba, Nigeria

DOI:

https://doi.org/10.31695/IJERAT.2021.3602

Keywords:

Natural Ventilation, CFD,, CO2 dispersion, IAQ, Thermal comfort

Abstract

This paper studied wind-driven natural ventilation in a room using a computational fluid dynamics model in order to determine the airflow pattern, draft and pollutant dispersion within the CFD model. The different natural ventilation strategies were studied in cases namely: CASE 1(Single sided ventilation), CASE 2(Cross Ventilation), CASE 3(Bernoulli and Cross Ventilation), and CASE 4(Double single-sided ventilation). The CFD simulation was performed with the 3D steady-state RANS approach using RNG-KE turbulent model to provide closure. From the result obtained, the author found out that Firstly, CASE 1 and CASE 4 showed a reduced level of air draft (V< 0.2m/s) within the room unlike the CASE 2 and CASE 3 where the airspeed on the room occupants most especially at the ankle and head region were much higher than that recommended as per BS EN 7730. Secondly, CASE 2 showed greater efficiency in dealing with pollutant dispersion then followed by CASE 3 and CASE 4 respectively. The concentrations in almost every part of the room for CASE 2 were well within the acceptable range recommended for human occupancy as per BS EN 7730.

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Published

2021-11-10

How to Cite

Okafor Chinedu Vincent, Okeke Arinze Uchenna, & Ononye Olisa Roy. (2021). CFD Analysis of Wind-Driven Natural Ventilation in Building Models. International Journal of Engineering Research and Advanced Technology (ijerat) (E-ISSN 2454-6135) DOI: 10.31695/IJERAT, 7(11), 1–8. https://doi.org/10.31695/IJERAT.2021.3602