Secondary clarifier
The following slides will help through the configuration of this case study using a mixture approach. The default solver included in OpenFOAM called driftFluxFoam doesn't include the compression term. Recently, an extension of this solver has been developed, see this article :
Valle Medina, M. E. and Laurent, J. (2020) Incorporation of a compression term in a CFD model based on the mixture approach to simulate activated sludge sedimentation. Applied Mathematical Modelling, 77, 848–860. DOI: 10.1016/j.apm.2019.08.008