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A study of wall-deposit formation using LES - generated velocity field

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1920
10 pages

P. Venturini
Dipartimento di Ingegneria Meccanica e Aerospaziale, 'Sapienza' Università di Roma, Via Eudossiana 18, 00164 Roma, Italy

Domenico Borello
Dipartimento di Ingegneria Meccanica e Aerospaziale, 'Sapienza' Università di Roma, Via Eudossiana 18, 00164 Roma, Italy

Kemal Hanjalic
Department of Physics, Novosibirsk State University (NSU), 1, Pirogov Str., Novosibirsk, 630090, Russia; Faculty of Applied Sciences, Delft University of Technology (TU Delft), Building 58, Van der Maasweg 9, 2629 HZ, Delft, The Netherlands

F. Rispoli
Dipartimento di Ingegneria Meccanica e Aerospaziale, 'Sapienza' Universita di Roma, Via Eudossiana 18, 00164 Roma, Italy

Sinopsis

We consider a model of deposition of non reactive, adhesive micro-particles in a turbulent flow around a single short wall-bounded cylinder mimicking a segment of a plate-fin-and-tube heat exchanger. The flow field is provided by a prior LES (Borello et al. 2008) and the particles dispersion is described by the Particle Cloud Tracking (PCT) of Baxter (1989). The deposition model is based on the balance between the rolling moments by the drag and the adhesion forces on the solid surfaces (Abd-Elhadi et al. 2004). The results are compared with the basic rolling moment approach originally developed for tracking individual particles (here denoted as the single particle model − SPT) as well as with two other adhesion models (van Beek, 2001, Thornton and Ning, 1998).

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