MFC: An open-source high-order multi-component, multi-phase, and multi-scale compressible flow solver

MFC is an open-source tool for solving multi-component, multi-phase, and bubbly compressible flows. It is capable of efficiently solving a wide range of flows, including droplet atomization, shock–bubble interaction, and bubble dynamics. We present the 5- and 6-equation thermodynamically-consistent diffuse-interface models we use to handle such flows, which are coupled to high-order interface-capturing methods, HLL-type Riemann solvers, and TVD time-integration schemes that are capable of simulating unsteady flows with strong shocks. The numerical methods are implemented in a flexible, modular framework that is amenable to future development. The methods we employ are validated via comparisons to experimental results for shock–bubble, shock–droplet, and shock–water–cylinder interaction problems and verified to be free of spurious oscillations for material-interface advection and gas–liquid Riemann problems. For smooth solutions, such as the advection of an isentropic vortex, the methods are verified to be high-order accurate. Illustrative examples involving shock–bubble–vessel-wall and acoustic–bubble–net interactions are used to demonstrate the full capabilities of MFC. ; © 2020 Elsevier B.V. Received 25 July 2019, Revised 9 April 2020, Accepted 29 April 2020, Available online 23 May 2020. The authors are grateful for the suggestions of Dr. Benedikt Dorschner when making MFC open source. This work was supported in part by multiple past grants from the US National Institutes of Health (NIH), the US Office of Naval Research (ONR), and the US National Science Foundation (NSF), as well as current NIH Grant No. 2P01-DK043881 and ONR Grant Nos. N0014-17-1-2676 and N0014-18-1-2625. The computations presented here utilized the Extreme Science and Engineering Discovery Environment, which is supported under NSF , USA grant number CTS120005. K.M. acknowledges support from the Funai Foundation for Information Technology, USA via the Overseas Scholarship. The authors declare that they have no known ...