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손민수(Minsoo Son),박미소(Miso Park),정혜진(Hyejin Jung) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
We have studied on a nanoparticle precipitator using thermophoretic force by temperature gradient. The deposition time of nanoparticles onto a substrate was computed by theoretical analysis and CFD methods, respectively. We analyzed the deposition time by two methods, and we notice of a particle motion and tendency. Also, we carried out experiments using simple apparatus and got the SEM images collected particles. As a result, we predicted a particle motion in the precipitator using theoretical equation and CFD and we designed the precipitator using design variables by this study.
강성현(Sung Hyun Kang),임승호(Seung Ho Lim),김가영(Ga Young Kim),손민수(Minsoo Son),신원규(Weon Gyu Shin) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
In this study, a novel in-line impactor with the flowrate of 1000 lpm and d50(50% cut size) of 19.5㎛ was designed to be conveniently connected to a wet cyclone. The novel in-line impactor has an orifice unlike previously developed in-line impactors. The collection efficiency of our impactor was predicted through numerical analysis using DPM module in ANSYS 14.5 FLUENT solver. CFD simulations were conducted at a fixed Stokes number varying the size of orifice width (d<SUB>o</SUB>) and distance between an orifice and a nozzle (L<SUB>n,o</SUB>). From the results, it was found that the larger L<SUB>n,o</SUB> makes d<SUB>50</SUB> larger. When d<SUB>o</SUB> and L<SUB>n,o</SUB> equal to 4.2 mm and 32 mm, respectively, our newly designed impactor has the lowest wall loss rate and a very steep collection efficiency curve like conventional impactors.