Microparticle Dynamics in Electrostatic and Flow Fields

Sheng Chen (Autor)

Buch | Softcover

138 Seiten

2024
Springer Verlag, Singapore
978-981-16-0845-2 (ISBN)

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This thesis proposes new approaches for modelling contacting interactions and electrostatic interactions between microparticles in the framework of the discrete element method and presents a systematic investigation on the agglomeration, migration and deposition of microparticles in presence of electrostatic and flow fields. It reports an exponential-form scaling for the size distribution of early-stage agglomerates in homogeneous isotropic turbulence and formulate the agglomeration and deagglomeration rates. The evolution of spherical clouds of charged particles that migrate under the action of an external electrostatic field is then investigated. Scaling laws of cloud radius and particle number density are obtained by solving a continuum convection equation. Finally, it investigates the deposition of charged particles on a flat plane and fibers. A dimensionless adhesion parameter is constructed to predict the structure of deposits. The temporal evolution of the deposit structure, particle capture efficiency, and the pressure drop are displayed with varying values of Coulomb repulsion and adhesion magnitudes.

Sheng Chen is an associate professor in the School of Energy and Power Engineering at Huazhong University of Science and Technology. He received his Ph.D. in Power Engineering and Engineering Thermophysics from Tsinghua University in 2019. He is a recipient of the Excellent Ph. D Thesis Award of Tsinghua University (2019). Dr. Chen's research interest is on particle-laden turbulent flows, particle-based solar thermal technologies, and particle formation during combustion. He has been awarded two grants from the Natural Science Foundation of China and has authored more than 15 journal articles.

Introduction.- A Fast Discrete Element Method for Adhesive particles.- Agglomeration of microparticles in homogenous isotropic turbulence.- Migration of cloud of low.- Reynolds-number particles with Coulombic and hydrodynamic interactions.- Deposition of Microparticles with Coulomb repulsion.- Deposition of charged micro-particles on ﬁbers: clogging phenomenon.- Conclusions and perspective.

Erscheinungsdatum	03.05.2024
Reihe/Serie	Springer Theses
Zusatzinfo	81 Illustrations, color; 6 Illustrations, black and white; XIX, 138 p. 87 illus., 81 illus. in color.
Verlagsort	Singapore
Sprache	englisch
Maße	155 x 235 mm
Themenwelt	Naturwissenschaften ► Biologie ► Ökologie / Naturschutz
	Naturwissenschaften ► Physik / Astronomie ► Festkörperphysik
	Technik ► Maschinenbau
Schlagworte	agglomeration and breakage • Discrete element method • fine particles • particle-laden flows • particle migration • particle packings
ISBN-10	981-16-0845-8 / 9811608458
ISBN-13	978-981-16-0845-2 / 9789811608452
Zustand	Neuware