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Evaluation of Hydrodynamic Closures for Bubbly Regime CFD Simulations in Developing Pipe Flow
Author(s) -
Shiea Mohsen,
Buffo Antonio,
Baglietto Emilio,
Lucas Dirk,
Vanni Marco,
Marchisio Daniele
Publication year - 2019
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201900116
Subject(s) - mechanics , computational fluid dynamics , lift (data mining) , turbulence , bubble , eulerian path , closure (psychology) , flow (mathematics) , lift coefficient , lubrication , physics , mathematics , thermodynamics , computer science , lagrangian , reynolds number , economics , market economy , data mining
The effect of interfacial forces and relevant closures, particularly the lift and wall lubrication forces, on the predictions of Eulerian‐Eulerian computational fluid dynamics simulations of bubbly flows was studied. The test case under study was a developing turbulent bubbly pipe flow, simulated by using OpenFOAM. The results show that the geometric approach to consider the wall effect leads to better agreement than a standard relation assuming asymmetric drainage around the bubble near the wall. Furthermore, the results verify the need for employing negative lift coefficients in cases with large bubbles. A sensitivity analysis on the lift coefficient highlighted the importance of investigating spatially developing flows to draw general conclusions on the applicability of closure relations.