mod_eprivacy

Development of numerical methods for the simulation of compressible droplet dynamic processes under extreme conditions

Description

Multiphase flows are still challenging for physical, mathematical as well as numerical modelling, especially for a flow regime with extreme ambient conditions, as contemplated in this SFB TRR 75. In this subproject numerical methods for the direct numerical modeling of individual droplets are developed and implemented. Various plugins to implement these flow regimes in the program ‘FS3D’ are being developed. To investigate the numerical modeling in terms of thermodynamic conditions and interaction and to validate, assuming spherical drops a test environment is created. Modeling approaches can be tested quickly in this environment.

Direct simulations of flows with droplets require several components: A solver for compressible multicomponent flows with an EOS to accound for real fluid behaviour, methods for coupling the different fluids and algorithms for tracking the material or phase boundaries. In this project the ‘sharp-interface-coupling’ is investigated, whereby the ‘ghost-fluid-method’ is used. The identification of the material boundaries is performed by level-set and/or the volume-of-fluid approach. It is exploited here, that the ‘level set approach’ yields the position, the curvature and the normal of the material boundary and the mass conservation is good in the VOF or indicator approach. Level-Set, VOF-equation and the flow field equations are calculated with a discontinuous Galerkin method in which locally the resolution can be improved by h-p adaptation. The numerical method has to be applicable to the planned application with a compressible twophase flow regime. Therefore the transition in the near to supcritical regime has to be implemented

The main research topics of the TP-A2 in the first funding period are the numerical modeling of the thermodynamic relations on the droplet’s surface and the implementation in the computation program „FS3D“. An essential cooperation exists with thermodynamics, mathematics and chemistry.

Team

Prof. Dr. rer. nat. Claus-Dieter Munz

Prof. Dr. rer. nat. Claus-Dieter Munz

Chairman | Director projectarea A | Director subarea A2 This email address is being protected from spambots. You need JavaScript enabled to view it. +49 711 685-63433
Steven Jöns, M.Sc.

Steven Jöns, M.Sc.

A2 This email address is being protected from spambots. You need JavaScript enabled to view it. +49 711 685-63423
237238

Publications

2017

Hempert, F., Boblest, S., Ertl, T., Sadlo, F., Offenhäuser, P., Glass, C.W., Hoffmann, M., Beck, A.,  Munz, C.-D., Iben, U.:
Simulation of real gas effects in supersonic methane jets using a tabulated equation of state with a discontinuous Galerkin spectral element method.
Comput. Fluids 145: 167-179, 2017.

Fechter, S., Munz, C.-D., Rohde, C., Zeiler, C.:
A sharp interface method for compressible liquid-vapor flow with phase transition and surface tension.
J. Comput. Phys. 336: 347-374, 2017.

Fechter, S., Munz, C.-D., Rohde, C., Zeiler, C.:
Approximate Riemann solver for compressible liquid vapor flow with phase transition and surface tension,
Comput.Fluids, http://dx.doi.org/10.1016/j.compfluid.2017.03.026, 2017.

2016

Hitz, T., Fechter, S., Munz, C.-D.:
Simulation of Evaporating Droplets Within A Discontinuous Galerkin Multi-Scale Framework.
Proceedings of the ICMF 2016, Florence, Italy, 2016.

2015

S. Fechter, C.-D. Munz.
A discontinuous Galerkin-based sharp-interface method to simulate three-dimensional compressible two-phase flow,
International Journal for Numerical Methods in Fluids 78(7), 413–435, 2015.

S. Fechter, C.-D. Munz, C. Rohde, C. Zeiler.
A sharp interface method for compressible liquidvapor flow with surface tension,
submitted to J. Comput. Phys. 2015.

S. Fechter, C.-D. Munz, C. Rohde, C. Zeiler.
Approximate Riemann solver for compressible liquid vapor flow with phase transition and surface tension,
Preprint 2015.

S. Fechter.
Compressible multi-phase simulation at extreme conditions using a discontinuous Galerkin scheme.
Dissertation University of Stuttgart, 2015.

T. Hitz, S. Fechter, C.-D. Munz.
Treatment of Phase Transitions Across a Sharp Interface Within a Discontinuous Galerkin Multi-Scale Framework.
Proceedings of the ICLASS 2015, Tainan, Taiwan, August 2015.

2013

Fechter, S., Jaegle, F. und Schleper, V
Exact and approximate Riemann solvers at phase boundaries
Computers and Fluids 75 (2013), 112-126. DOI: 10.1016/j.compfluid.2013.01.024

2012

Jaegle, F., Zeiler, C., Rohde, C
A multi-scale algorithm for compressible liquid-vapor flow with surface tension
ESAIM Proceedings 38 (2012), 387-408

Hindenlang, F., Gassner, G., Altmann, C., Beck, A., Staudenmaier, C., Munz, C.-D
Explicit discontinuous Galerkin methods for unsteady problems
Computers and Fluids 61 (2012), 86-93.

Karch, G.K., Sadlo, F., Weiskopf, D., Munz, C.-D., Ertl, T
Visualization of Advection-Diffusion in Un- steady Fluid Flow
Computer Graphics Forum 31 (2012), 1105–1114

Fechter, S., Jaegle, F., Boger, M., Zeiler, C., Munz, C.-D., Rohde, C
A discontinuous Galerkin based multiscale method for compressible multiphase flow.
ICCFD 2012, 7th International Conference on Computational Fluid Dynamics, Hawaii, USA, 2012

Fechter, S., Jaegle, F., Boger, M., Munz, C.-D
Direct numerical simulation of compressible multiphase flow using a discontinuous Galerkin based multiscale approach.
ICLASS 2012, 12th International Conference on Liquid Atomization and Spray Systems, Heidelberg, Germany, 2012

2011

Ferrari, A., Munz, C.-D., Weigand, B
A High Order Sharp-Interface Method with Local Time Stepping for Compressible Multiphase Flows
Commun. Comput. Phys. 9 (2011), 205-230

Sadlo, F.,   Üffinger, M., Pagot, C., Osmari, D., Comba, J., Ertl, T., Munz, C.-D., Weiskopf, D.:
Visualization of Cell-Based Higher-Order Fields.
Comput.Sci. Eng. 13: 84-91, 2011.

2007

Gassner, G., Lörcher, F., Munz, C.-D
A contribution to the construction of diffusion fluxes for finite volume and discontinuous Galerkin schemes
J. Comput. Phys. 224 (2007), 1049-1063

Friday, November 15, 2019