Effect of Airborne Pathogen Transmission Released by an Assailant in A Mosque Using CFD Simulation

IF 0.4 Q4 ENGINEERING, MULTIDISCIPLINARY

International Journal of Integrated Engineering Pub Date : 2023-08-28 DOI:10.30880/ijie.2023.15.04.012

Mohamad Nur Hidayat Mat, Muhammad Faizal Azman, Eliza M. Yusup

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引用次数: 0

Abstract

This study investigated the aerosol particle spreading characteristic under transient state at different location released by an assailantinside a mosque. Particles deposited at receivers were used to determine the virus reproductive number (Ro) over time. The spreading during coughing process wasvalidated with previous literature review using Computational Fluid Dynamics (CFD) simulation study. Mesh sensitivity study was done on the model to get better accuracy results and optimum computational load. Themodel involved internal space of the mosque and 160 prayers during the congregation prayers. It was discovered that, the particle spreading characteristics wasfound to be influenced mostly by the velocity distribution and velocity vector inside the mosque. This is due to force flow generated by fan and air conditionerair flow. Particles size less than 10μm werethe most deposited on the wall and ceiling. The particles greater than 30μm deposited on the ground andthe prayers body. The location of assailant at the center wasfound to cause the most infection among the prayers which was52% of the total prayer with the Roof 0.83. The assailant at top right and bottom right produced high Roof 0.73 and 0.6 while top left produced the lowest which was0.32. The existence of partition wasfound to reduce the particle spreading from the assailant at bottom left.

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利用CFD模拟攻击者对清真寺内空气传播病原体的影响

研究了一名袭击者在清真寺内释放的气溶胶粒子在不同位置的瞬态扩散特性。沉积在受体上的颗粒用于测定病毒随时间的繁殖数(Ro)。采用计算流体动力学(CFD)模拟研究方法对咳嗽过程中的传播进行验证。为了获得更好的精度结果和优化的计算负荷，对模型进行了网格敏感性研究。该模型涉及清真寺的内部空间和会众祈祷时的160个祈祷者。研究发现，颗粒的扩散特性主要受清真寺内的速度分布和速度矢量的影响。这是由于风扇和空调气流产生的力流。粒径小于10μm的颗粒主要沉积在壁面和顶板上。粒径大于30μm的颗粒沉积在地面和祈祷体上。在祈祷者中，攻击者在中心位置的感染最多，占祈祷者总数的52%，屋顶为0.83。右上方和右下方的攻击者产生的最高Roof值分别为0.73和0.6，而左上方的攻击者产生的最低Roof值为0.32。发现隔板的存在可以减少粒子从左下方的攻击者身上扩散。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Integrated Engineering ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.40

自引率

0.00%

发文量

期刊介绍： The International Journal of Integrated Engineering (IJIE) is a single blind peer reviewed journal which publishes 3 times a year since 2009. The journal is dedicated to various issues focusing on 3 different fields which are:- Civil and Environmental Engineering. Original contributions for civil and environmental engineering related practices will be publishing under this category and as the nucleus of the journal contents. The journal publishes a wide range of research and application papers which describe laboratory and numerical investigations or report on full scale projects. Electrical and Electronic Engineering. It stands as a international medium for the publication of original papers concerned with the electrical and electronic engineering. The journal aims to present to the international community important results of work in this field, whether in the form of research, development, application or design. Mechanical, Materials and Manufacturing Engineering. It is a platform for the publication and dissemination of original work which contributes to the understanding of the main disciplines underpinning the mechanical, materials and manufacturing engineering. Original contributions giving insight into engineering practices related to mechanical, materials and manufacturing engineering form the core of the journal contents.