Implicitly coupled phase fraction equations for polydisperse flows
KAUST DepartmentMechanical Engineering
Physical Science and Engineering (PSE) Division
Mechanical Engineering Program
Clean Combustion Research Center
KAUST Grant NumberOSR-2017-CRG6-3409.03
Embargo End Date2021-11-28
Permanent link to this recordhttp://hdl.handle.net/10754/666258
MetadataShow full item record
AbstractThis work presents the implementation, verification and the validation of an incompressible Eulerian multi-fluid model for polydisperse flows. The proposed model uses a novel monolithic, i.e. implicitly coupled phase continuity equation for an arbitrary number of fluids, where the breakup source and sink terms are handled implicitly in the block-system. The implemented model is tested for an upward bubbly flow inside a large vertical pipe. The selected flow conditions exhibit both breakup and coalescence. The grid refinement study is conducted on four structured grids with varying levels of refinement. In the validation section, the numerical results are compared to the TOPFLOW experimental measurements. The last presented test examines the performance of the novel implicitly coupled phase continuity equation to the corresponding segregated formulation and the standard segregated formulation. The performance is evaluated by comparing the conservation error over the non-linear iterations. The presented model exhibits good agreement with the experimental measurements and gives stable results on various grids with different levels of refinement. Moreover, the implicit coupling reduces the conservation error during the calculation.
CitationKeser, R., Ceschin, A., Battistoni, M., Im, H. G., & Jasak, H. (2020). Implicitly coupled phase fraction equations for polydisperse flows. International Journal for Numerical Methods in Fluids. doi:10.1002/fld.4945
SponsorsKing Abdullah University of Science and Technology, Grant/Award Number:OSR-2017-CRG6-3409.03; CroatianScience Foundation, Grant/Award Number:DOK-01-2018.