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Data-Two-dimensional numerical study on particle motion trajectories and deposition in a channel of partial diesel particulate filter

Citation

Wang, Xiaolong; Deng, Yangbo; Liu, Yang (2021), Data-Two-dimensional numerical study on particle motion trajectories and deposition in a channel of partial diesel particulate filter, Dryad, Dataset, https://doi.org/10.5061/dryad.pnvx0k6n4

Abstract

A numerical investigation on the soot laden flow of gas in a PDPF (Partial Diesel Particulate Filter) is presented based on solving the momentum equations for continuous phase in the Euler frame and the motion equations for dispersed phase in the Lagrangian frame. The interaction between the gas and particles is treated as one-way coupling for extremely dilute particle concentration, while the interaction between particles and porous wall is implemented through user-defined-subroutines. To accurately track the motion of nanoscale particles, the drag force, the Brownian excitation, and the partial slip are included in the particle motion equation. Two methods are used to verify the gas flow model and reasonable agreement for both comparisons is observed. The effects of upstream velocity, wall permeability and particle size on the filtration efficiency and deposition distribution of the particles along the wall surface of inlet channel are quantitatively studied. The results show that (1) the wall permeability plays the most primary role in determining the filtration efficiency of PDPF; (2) high upstream velocity improves filtration efficiency and drives the deposition position of particles to the rear of inlet channel; (3) the dependence of the particle deposition distribution on its own size is mainly reflected in the initial deposition position; (4) the filtration efficiency of PDPF is not proportional markedly to the gas flow into inlet channel at a low wall permeability, implying an intense separation of particles from gas streamline at the flow entrance.

Funding

Dalian Science and Technology Innovation Fund, Award: No.2020JJ26SN065