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CFD Simulation of Natural Ventilation in Hospital Wards: The Effect of Insect Screen and Plenum in Dust Penetration

Lookup NU author(s): Dr Steven Dudek, Dr Neveen Hamza



This is the final published version of a conference proceedings (inc. abstract) that has been published in its final definitive form by Aalto University, 2018.

For re-use rights please refer to the publisher's terms and conditions.


Due to growing concern on energy, sustainability and carbon emission, the application of low/zero energy ventilation strategies is essential. In Nigeria, the use of energy intensive strategies is not possible due to the prevalent energy shortages. To provide acceptable Indoor Air Quality (IAQ), sustainable ventilation is required. The main objective of the study is to provide acceptable IAQ and air change rates (ACR) in hospital wards with installed insect screen while excluding the prevalent Hamadan dust. CFD Fluent 13.0 was used for the simulation and particle tracking was conducted using Lagrangian approach of the Discrete Phase Model (DPM). To improve the ventilation rates, while excluding Harmattan dust, plenums have been introduced in the windward and leeward sides of the wards. The results show that, the introduction of the plenum to the windward side of the ward resulted in 83.7% increase in ACR, while introducing plenums to both the windward and the leeward sides resulted in 127.9% and 133.7% increase in ACR respectively compared to the case without plenum. Thus, the installation of the insect screens on the plenums with larger surface area rather than directly installing on the openings increases ACR and acceptable ventilation will be achieved with lower porosity screens. CFD Simulation, Air Change Rates, Insect Screen, Harmattan Dust, Plenum, Hospital Ward

Publication metadata

Author(s): Mohammed M, Dudek S, Hamza N

Editor(s): Finnish Society of Indoor Air Quality

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Roomvent and Ventilation 2018 Conference

Year of Conference: 2018

Number of Volumes: 1

Pages: 1115-1120

Online publication date: 02/06/2018

Acceptance date: 02/04/2018

Date deposited: 26/09/2018

Publisher: Aalto University


Library holdings: Search Newcastle University Library for this item

ISBN: 9789525236484