کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4453037 | 1312126 | 2008 | 11 صفحه PDF | دانلود رایگان |
We investigate analytically and numerically aerodynamic focusing of aerosol particles in the incompressible Poiseuille flow in a two-dimensional channel where the channel walls perform small oscillations perpendicular to the channel axis. The fluid–particle interaction is described by a linear drag force. Focusing efficiency is investigated for variety of flow and particle parameters, expressed in terms of dimensionless groups, namely parameter εε, characterizing the amplitude of wall oscillations; flow velocity parameter ΠU=U/ωh where UU is the maximal velocity of the imposed flow, h is the channel half-height, ωω is the angular frequency of oscillations; and frequency parameter ωτωτ, where ττ is Stokes relaxation time. It is shown that wall channel oscillations with frequency of about 1 kHz can focus micron-size particles on axial distances comparable to several channel heights.
Journal: Journal of Aerosol Science - Volume 39, Issue 11, November 2008, Pages 929–939