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A Computational Fluid Dynamics code for aerosol and decay-product studies in indoor environments


In the present work, Computational Fluid Dynamics (CFD) code has been used to simulate the behaviour of aerosols and decay products of 222Rn/220Rn in indoor environments. The code has been incorporated with simulation modules describing relevant physical processes governing the aerosol and decay product dynamics such as particle deposition, gravitational settling, thermophoresis, coagulation and size dependent attachment of decay products to aerosol. Subsequently, reliability and consistency of the CFD code has been evaluated and validated by comparing simulated results with analytical and simulation results of well-known cases reported in literature. Comparison showed a good agreement within ± 3.5%.

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The authors are highly thankful to Dr. Anil Kumar and Dr. Arun Murthy from Fluidyn Gunsoft, Banaglore for their support and knowledge.


No Grant has been provided for this work.

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All authors contributed to the study conception, methodology, data generation and analysis. The first draft of the manuscript was written by TKA and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to B. K. Sapra.

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Agarwal, T.K., Sahoo, B.K., Kumar, M. et al. A Computational Fluid Dynamics code for aerosol and decay-product studies in indoor environments. J Radioanal Nucl Chem 330, 1347–1355 (2021).

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  • Radon
  • Thoron
  • Decay products
  • Aerosol
  • CFD simulation
  • Validation