Published Jan 18, 2018


Numerical simulation of the acoustic agglomeration of micron-sized mono-dispersed aerosol particles is demonstrated in the article. The forces acting the moving particle into the moving fluid as well as the coordinates and velocities of the particles are described by the differential equations. Having calculated results it is concluded that the agglomeration time of the two identical particles decreases mainly due to the introduction of other particles into the multilayer system.


Straipsnyje parodyta, kaip diskrečiųjų elementų metodas (DEM) taikomas polidispersinių aerozolio dalelių akustinės aglomeracijos skaitiniam modeliavimui. Lygtimis aprašytos jėgos, veikiančios dalelę, judančią terpėje, ir pateiktos dalelės judėjimo greičio ir trajektorijos nustatymo lygtys. Gavus rezultatus nustatyta, kad dviejų vienodo skersmens izoliuotų dalelių aglomeracijos laikas iš esmės sumažėja dėl kitų dalelių įterpimo į daugiasluoksnę sistemą.

Reikšminiai žodžiai: akustinė aglomeracija, aerozolio dalelės, DEM.



acoustic aglomeration, aerosol particles, DEM

Beetstra, R.; Hoef, M. A. Van Der; Kuipers, J. A. M. 2007. Drag force of intermediate Reynolds number flow past mono- and bidisperse arrays of spheres, AICHE Journal 53(2): 489–501. https://doi.org/10.1002/aic.11065

Deen, N. G.; Van Sint Annaland, M.; Van der Hoef, M. A.; Kuipers, J. A. M. 2007. Review of discrete particle modeling of fluidized beds, Chemical Engineering Science 62(1–2): 28–44. https://doi.org/10.1016/j.ces.2006.08.014

Europos Parlamento ir Tarybos Direktyva 2003/35/EB [interaktyvus]. 2003 [žiūrėta 2018 m. sausio 9 d.]. Prieiga per internetą: http://www.europarl.europa.eu/sides/getDoc.do?pubRef=-//EP//TEXT+REPORT+A8–2015–0249+0+DOC+XML+V0//LT

Hoffmann, T. L. 2000. Environmental implications of acoustic aerosol agglomeration, Ultrasonics 38(1–8): 353–357. https://doi.org/10.1016/S0041–624X(99)00184–5

Yao, Y. 2016. Research and applications of ultrasound in HVAC field: a review, Renewable and Sustainable Energy Reviews 58(May 2016): 52–68. https://doi.org/10.1016/j.rser.2015.12.222

Yazdchi, K.; Luding, S. 2012. Towards unified drag laws for inertial flow through fibrous materials, Chemical Engineering Journal 207–208: 35–48. https://doi.org/10.1016/j.cej.2012.06.140

Kačianauskas, R.; Maknickas, A.; Vainorius, D. 2017. DEM analysis of acoustic wake agglomeration for mono-sized mi-croparticles in the presence of gravitational effects, Granular matter 19: 1–12. https://doi.org/10.1007/s10035–017–0726–5

Maxey, M. R.; Riley, J. J. 1983. Equation of motion for a small rigid sphere in a nonuniform flow, Physics of Fluids 26(4): 883–889. https://doi.org/10.1063/1.864230

Mikhailov, M. D.; Freire, A. P. S. 2013. The drag coefficient of a sphere: an approximation using Shanks transform, Powder Technology 237(March 2013): 432–435. https://doi.org/10.1016/j.powtec.2012.12.033

Omidvarborna, H.; Kumar, A.; Kim, D. 2015. Recent studies on soot modeling for diesel combustion, Renewable and Sustainable Energy Reviews 48(2015): 635–647. https://doi.org/10.1016/j.rser.2015.04.019

Tiwary, R.; Reethof, G. 1986. Hydrodynamic interaction of spherical aerosol particles in a high intensity acoustic field, Journal of Sound and Vibration 108(1): 33–49. https://doi.org/10.1016/S0022–460X(86)80309–1

Zaidi, A. A.; Tsuji, T.; Tanaka, T. 2015. Hindered settling velocity & structure formation during particle settling by direct numerical simulation, Procedia Engineering 102(2015): 1656–1666. https://doi.org/10.1016/j.proeng.2015.01.302

Zhou, D.; Luo, Z.; Jiang, J.; Chen, H.; Lu, M.; Fang, M. 2016. Experimental study on improving the efficiency of dust removers by using acoustic agglomeration as pretreatment, Powder Technology 289 (February 2016): 52–59. https://doi.org/10.1016/j.powtec.2015.11.009

Xiang, L.; Shuyan, W.; Huilin, L.; Goudong, L.; Juhui, C.; Yikun, L. 2010. Numerical simulation of particle motion in vibrated fluidized beds, Powder Technology 197(1–2): 25–35. https://doi.org/10.1016/j.powtec.2009.08.016