期刊
BUILDING AND ENVIRONMENT
卷 225, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.buildenv.2022.109649
关键词
Tomb; Airflow; Murals; Fungi; Visitor; Contamination
资金
- National Science and Technology Ministry of China
- National Natural Science Foundation of China
- Fundamental Research Funds for the Central Universities
- [2019YFC1520700]
- [42122058]
- [41977368]
- [2020YJ007]
This study found that Bioaerosol Particles in air were an important source of contamination on murals, and used computational fluid dynamics to study the influence of visitor walking speed on airflow and Bioaerosol Particles distribution in a typical open tomb. Results showed that Bioaerosol Particles migrated around the visitor while walking, contaminating the murals, and the number of deposited particles was positively correlated with walking speed.
With the rapid development of modern tourism, the contamination of cultural heritage including human spiritual civilization by visitors has increased, particularly for precious murals. In this study, the Bioaerosol Particles in air were found to be an important source of contamination on murals by internal transcribed spacer rRNA gene -based sequences. Moreover, computational fluid dynamics was applied to further study the influence of visitor walking speed on airflow and Bioaerosol Particles distribution in a typical open tomb. The accuracy of the results was verified by field experiments, including environmental parameter monitoring and Bioaerosol Particles collection. The fairly mature Omega vortex identification method was introduced to analyse the airflow changes and Bioaerosol Particles migration as the visitor walked at three different speeds. Furthermore, the effects of glass barriers were evaluated neutrally. The results showed that the Bioaerosol Particles migrated around the visitor while walking, contaminating the murals. After walking, the number of Bioaerosol Particles deposited on murals increased and was approximately positively correlated with walking speed. The amount of Bioaerosol Particles deposited decreased significantly when barriers were installed near the walls. This study provides a reference for the sustainable protection and inheritance of the history and civilization of mankind in modern cities.
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