Numerical modeling of contact discontinuities in two-phase flow
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/329644
Tipus de documentText en actes de congrés
Data publicació2019
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
For convection dominated two-phase flow, velocity components tangential to the
interface can become discontinuous when interface boundary layers are numerically underre- solved.
When sharp interface tracking methods are used it is essential that such discontinuities are
captured in an equally sharp way.
In this paper we propose to model the velocity component tangential to the interface as dis-
continuous using an appropriate interface jump condition on the normal component of the pres- sure
gradient. We achieve this numerically using a novel combination of a Multi-dimensional Ghost Fluid
Method for the gradient and the Cut Cell Method for the divergence operator. The resulting model is
able to accurately and sharply capture discontinuities at large density ratios. The model is
applied to an inviscid dam-break problem. Here we observe that our proposed model accurately
captures the shear layer at the interface with the tangential velocity discontinuity.
In future work we will apply this discretization approach to the modeling of viscous two- phase
sloshing problems with LNG and its compressible vapour, with a particular interest in
studying the development of free surface instabilities.
CitacióRemmerswaal, R.A.; Veldman, A.E.P. Numerical modeling of contact discontinuities in two-phase flow. A: MARINE VIII. "MARINE VIII : proceedings of the VIII International Conference on Computational Methods in Marine Engineering". CIMNE, 2019, p. 247-258. ISBN 978-84-949194-3-5.
ISBN978-84-949194-3-5
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