| Title: |
Effect of electrostatic forces on the dispersion of like-charged solid particles transported by homogeneous isotropic turbulence |
| Authors: |
Boutsikakis, Athanasios; Fede, Pascal; Simonin, Olivier |
| Contributors: |
Institut de mécanique des fluides de Toulouse (IMFT); Université Toulouse III - Paul Sabatier (UT3); Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP); Communauté d'universités et établissements de Toulouse (Comue de Toulouse) |
| Source: |
ISSN: 0022-1120. |
| Publisher Information: |
CCSD; Cambridge University Press (CUP) |
| Publication Year: |
2022 |
| Collection: |
Université Toulouse III - Paul Sabatier: HAL-UPS |
| Subject Terms: |
Particle/fluid flow; [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] |
| Description: |
International audience ; The effect of electrostatic forces on the dispersion of small like-charged inertial particles transported by a homogeneous isotropic turbulent flow is analysed by means of direct numerical simulations coupled with the Lagrangian tracking of charged particles. The results show that particle dispersion decreases for increasing charge. Since turbulent particle dispersion is related to the intensity of particle agitation and to the Lagrangian particle integral time scale, we analyse the effects of electrostatic forces on these two quantities. Particle agitation decreases for increasing particle charge. In fact, particle kinetic energy is not directly modified by electrostatic forces, which are conservative, it is rather the particle entrainment by fluid turbulence that is modified. To support this claim, one shows that the fluid–particle velocity covariance is destructed by electrostatic forces, a destruction can be predicted by drawing an analogy between inter-particle collisions and Coulomb collisions. As expected, electrostatic forces decorrelate particle velocities leading to a decrease of the Lagrangian particle integral time scale. Finally, one shows that the analogy with inter-particle collisions allows us to predict the reduction of particle dispersion. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1017/jfm.2022.189 |
| Availability: |
https://ut3-toulouseinp.hal.science/hal-04533968; https://ut3-toulouseinp.hal.science/hal-04533968v1/document; https://ut3-toulouseinp.hal.science/hal-04533968v1/file/effect-of-electrostatic-forces-on-the-dispersion-of-like-charged-solid-particles-transported-by-homogeneous-isotropic-turbulence.pdf; https://doi.org/10.1017/jfm.2022.189 |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.7619115B |
| Database: |
BASE |