Deposition of submicron charged particles in turbulent pipe flow with an application to the trachea


  • H Akerstedt



The paper presents a study of the deposition of submicron charged spherical particles caused by convection, Brownian and turbulent diffusion in a pipe with a smooth wall and with a cartilaginous ring wall structure. The model is supposed to describe deposition of charged particles in generation 0 (trachea) of the human respiratory airways. The flow is modeled with a SST-turbulence model combined with a convective-diffusion equation including electric field migration for the particles, and Poisson’s equation for the determination of the electrostatic potential in terms of the space-charge density of the particles. An approximate analytical solution is derived for the case of a smooth pipe which is used to verify the numerical solutions obtained from using the commercial software Comsol Multiphysics. Numerical results of deposition rates are also provided for the case of a pipe with a cartilaginous ring wall structure.


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How to Cite

Akerstedt, H. (2018) “Deposition of submicron charged particles in turbulent pipe flow with an application to the trachea”, The International Journal of Multiphysics, 12(1), pp. 9-26. doi: 10.21152/1750-9548.12.1.9.