the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
| 13 May 2024
Modeling Inertial Deposition of Aerosol Particles in Geometrically Complicated Flow Systems Using Finite Element Methods
Abstract. This work presents a modeling approach for calculating the trajectories of aerosol particles in geometrically complicated flow systems. The finite-element based modeling is first validated by comparing the calculated inertial deposition with literature values for two cases of laminar flow: a 90-degree bend and an abrupt contraction of a pipe. The approach is then applied on a multi-part aerosol instrument used for Cantilever-Enhanced-Photo-Acoustic-Spectroscope (CEPAS) measurements. The particle transmission of the CEPAS is experimentally measured and compared to the modeling results. It is demonstrated that the model provides valuable insight on the inertial deposition losses by pinpointing their physical locations within the measurement instrument.
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RC1: 'Comment on egusphere-2024-1242', Anonymous Referee #1, 12 Jun 2024
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The manuscript presents a finite-element modeling approach for calculating the trajectories and inertial deposition losses of aerosol particles in flow systems. The authors validate their approach by comparing their results with literature values for two simple geometries (a 90-degree bend and an abrupt contraction) and then apply the model to a multi-part aerosol instrument used for Cantilever-Enhanced Photo-Acoustic Spectroscopy (CEPAS) measurements. The modeling results are compared to experimental measurements of particle transmission through the CEPAS.
I do not have concerns with the modeling itself. However, I think the novelty of this paper is not clear. The authors need to clearly state what is new in this paper. The modeling was done using COMSOL and its particle module, which is commercially available, and the modeling results are similar to those from empirical equations. I feel this paper is just applying commercial software to calculate a well-studied problem.
Citation: https://doi.org/10.5194/egusphere-2024-1242-RC1
Model code and software
COMSOL models for inertial deposition of particles in laminar flow Patrick Grahn https://doi.org/10.5281/zenodo.11003261
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