A numerical model based on the mixed interface-tracking/interface-capturing technique (MITICT) for flows with fluid-solid and fluid-fluid interfaces. http://dx.doi.org/10.1002/fld.1498

Abstract

We propose a numerical model for computation of flow problems that involve both fluid–solid and fluid–fluid interfaces. The model is based on the Mixed Interface-Tracking/Interface-Capturing Technique (MITICT), which was introduced earlier for problems that involve both fluid–solid interfaces that are accurately tracked with a moving mesh method and fluid–fluid interfaces that are too complex to track and therefore treated with an interface-capturing technique. In our numerical model, fluid–solid interfaces are handled with the Moving Lagrangian Interface Technique (MLIT) and fluid–fluid interfaces with the Edge-Tracked Interface Locator Technique (ETILT). The mixed technique is tested in computation of a fluid–particle interaction problem in the presence of a fluid–fluid interface impacted by the particle.