DOI: 10.1615/THMT-18
ISBN Print: 978-1-56700-468-7
ISBN Online: 978-1-56700-467-0
ISSN Print: 2377-2816
Multiphase Eulerian-Lagrangian LES of particulate fouling on structured heat transfer surfaces
SINOPSIS
This paper is addressed to the application of Eulerian-Lagrangian Large Eddy Simulations (LES) for the investigation of particulate fouling on structured surfaces, an important research field in context of particleladen two-phase flows. An efficient Lagrangian-Particle-Tracking algorithm is used to predict the trajectory of each suspended foulant particle (dispersed phase), suitable for dilute and dense dispersed two-phase flows by taking the fluid-particle (two-way coupling) as well as inter-particle interactions (four-way coupling) into account. The complex turbulent carrier flow (continuous phase) is calculated by eddy-resolving LES. Calculations have been performed for fully developed turbulent channel flows at moderate Reynolds numbers in combination with a sharp-edged spherical dimple considering a dimple depth/diameter ratio of t/D = 0.26 and a rectangular cavity with an equal cavity depth/side length ratio for comparative purposes. Additionally, the simulated fouling layer distribution for a spherical dimple within a smooth, narrow channel is compared with experimental measurements and exhibits a satisfying agreement.