ROS Theses Repository

View Item 
  •   ROS Home
  • Engineering & Physical Sciences
  • Doctoral Theses (Engineering & Physical Sciences)
  • View Item
  •   ROS Home
  • Engineering & Physical Sciences
  • Doctoral Theses (Engineering & Physical Sciences)
  • View Item
  •   ROS Home
  • Engineering & Physical Sciences
  • Doctoral Theses (Engineering & Physical Sciences)
  • View Item
  • Admin
JavaScript is disabled for your browser. Some features of this site may not work without it.

Development of kinetic-theory-based models accounting for charge transport in polydisperse gas-solid flows

View/Open
CeresiatLB_0422_epsSS.pdf (4.251Mb)
Date
2022-05
Author
Ceresiat, Lise Blanche
Metadata
Show full item record
Abstract
Kinetic-theory-based transport models are developed for polydisperse granular and gas-solid flows with contact electrification. Starting with the Boltzmann-Enskog kinetic equations, a transport equation for the solid phase charge is introduced into kinetic theory for granular flows with, first, monodisperse particles and, latter, binary solid mixtures. For binary mixture, each solid phase possesses its own macroscopic quantities (i.e. solid volume fraction, mean velocity, granular temperature, mean charge and charge variance) using the non-equipartitioning of random fluctuating kinetic energy. The primary model is extended for dilute regime where self-diffusion of charge is modelled via a charge-velocity correlation. The model is further extended for granular flows far away from equilibrium conditions by applying a perturbation to the Maxwellian state of particle velocities. The hydrodynamic and the additional charge transport models are assessed through hard-sphere simulation results at each stage of the model development. The charge evolution is well predicted for granular flows at equilibrium conditions, while predictions of the flows at non-equilibrium conditions are less accurate. The mathematical models are implemented into an open-source multiphysics computational framework (OpenFOAM) with developing a new solver. This solver is then used to study the effect of vessel size on charge build-up in gas-solid suspensions and to model lightning during volcanic eruptions.
URI
http://hdl.handle.net/10399/4605
Collections
  • Doctoral Theses (Engineering & Physical Sciences)

Browse

All of ROSCommunities & CollectionsBy Issue DateAuthorsTitlesThis CollectionBy Issue DateAuthorsTitles

ROS Administrator

LoginRegister
©Heriot-Watt University, Edinburgh, Scotland, UK EH14 4AS.

Maintained by the Library
Tel: +44 (0)131 451 3577
Library Email: libhelp@hw.ac.uk
ROS Email: open.access@hw.ac.uk

Scottish registered charity number: SC000278

  • About
  • Copyright
  • Accessibility
  • Policies
  • Privacy & Cookies
  • Feedback
AboutCopyright
AccessibilityPolicies
Privacy & Cookies
Feedback
 
©Heriot-Watt University, Edinburgh, Scotland, UK EH14 4AS.

Maintained by the Library
Tel: +44 (0)131 451 3577
Library Email: libhelp@hw.ac.uk
ROS Email: open.access@hw.ac.uk

Scottish registered charity number: SC000278

  • About
  • Copyright
  • Accessibility
  • Policies
  • Privacy & Cookies
  • Feedback
AboutCopyright
AccessibilityPolicies
Privacy & Cookies
Feedback