Annular Flow Deposition Model with Obstacle Effect
2007 (English)In: Proceedings of the 6th International Conference on Multiphase Flow, ICMF 2007, July 9-13, Leipzig, Germany, 2007Conference paper (Refereed)
Lagrangian particle simulations were performed in round, square and subchannel-type ducts with obstacle in order to study the influence of the obstacle and the shape of the conduit on deposition. The deposition mass transfer coeffient calculated from these simulations was correlated to the averaged square root of turbulent kinetic energy in the channel upstream and downstream of the obstacle, thus to obtain a new deposition model to be included into a thermal-hydraulic subchannel code for the prediction of CHF phenomenon. The deposition results calculated by the new model were compared to Govan correlation, with the conclusion that round duct data compare good to the correlation, but not the other geometries. Since the correlation itself was developed from round duct experimental data, it can be stated that the new deposition model is able to predict the deposition rate fairly good for this case. The results from other geometries would have to be compared to experimental data to be able to conclude that the model is valid.
Place, publisher, year, edition, pages
annular flow, deposition model, obstacle effect, particle tracking
IdentifiersURN: urn:nbn:se:kth:diva-9907OAI: oai:DiVA.org:kth-9907DiVA: diva2:158043
The 6th International Conference on Multiphase Flow, ICMF 2007, Leipzig, Germany, July 9-13, 2007
QC 201010072009-02-182009-01-292010-10-07Bibliographically approved