Conference
Algebraic momentum preserving method with a fully-coupled 3D solver
| العنوان: | Algebraic momentum preserving method with a fully-coupled 3D solver |
|---|---|
| المؤلفون: | El Ouafa, Mohamed, Vincent, Stéphane, Le Chenadec, Vincent, Trouette, Benoît |
| المساهمون: | Laboratoire Modélisation et Simulation Multi-Echelle (MSME), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel, We are grateful for access to the computational facilities of the French CINES and TGCC granted by GENCI under project numbers A0092B06115. |
| المصدر: | 4th International Conference on Numerical Methods in Multiphase Flows (ICNMMF) https://hal.science/hal-04079984 4th International Conference on Numerical Methods in Multiphase Flows (ICNMMF), Sep 2022, Venise, Italy |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Fully-coupled solver, two-phase flows, high density and viscosity ratios, momentum preserving, [PHYS.MECA]Physics [physics]/Mechanics [physics], [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] |
| جغرافية الموضوع: | Venise, Italy |
| الوصف: | International audience ; Two-phase flows with separated phases are prevalent in several industrial and environmental applications, where the conditions and regimes encountered spread wide and far. In the energy sector for example, the atomisation of liquid jets results from complex interactions between a coherent liquid jet, a gas-filled plenum and (potentially) a co-flowing gaseous jet. Breaking waves are another instance of two-phase flows, characterised by a high degree of turbulence, as are droplet impacts on liquid surfaces, nanofabrication by thermal plasma jets, to name a few.The high density and viscosity ratios encountered in these two-phase flows couple strongly the velocity components in the interface vicinity, and often result in strong shear at these interfaces. This yields in ill-conditioned linear systems (as a result of the semi-discretisation of the two-phase incompressible Navier-stokes equations) that pose significant problems together with the treatment of the coupled velocity-pressure saddle-point system. Solving these systems remains a challenging task for mathematicians as well as engineers. In addition, it has been demonstrated that solving theses equations in a non-conservative form with high density ratios leads to incorrect velocity field or volume fraction and often a failure of numerical scheme, due to numerical error accumulation near the highly deforming interface.The main objective of the present work is to further investigate the solution of the coupled system (without any time-splitting approach) by means of a preconditioned BiCGstab(2) solver. We obtain high performance with a new preconditioning strategy that combines a triangular block preconditionning for the velocity block with a pressure convection diffusion (PCD) preconditionner for the Schur complement. To provide the stability of the numerical scheme in the presence of high density and viscosity ratios, we use an algebric momentum preserving mass and momentum transport in the conservative form of discrete equations. The ... |
| نوع الوثيقة: | conference object still image |
| اللغة: | English |
| الاتاحة: | https://hal.science/hal-04079984 https://hal.science/hal-04079984v1/document https://hal.science/hal-04079984v1/file/poster_ICNMMF4.pdf |
| Rights: | http://hal.archives-ouvertes.fr/licences/publicDomain/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.E6C6CAE8 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |