Focaliser sur:
Tous les jours
5 nov. 2015
6 nov. 2015
Indico style
Indico style - inline minutes
Indico style - numbered
Indico style - numbered + minutes
Indico Weeks View
Retour à l'affichage de la conférence
Choisissez le fuseau horaire
Utiliser le fuseau horaire de l'événement/catégorie
Veuillez spécifier un fuseau horaire
Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmara
Africa/Bamako
Africa/Bangui
Africa/Banjul
Africa/Bissau
Africa/Blantyre
Africa/Brazzaville
Africa/Bujumbura
Africa/Cairo
Africa/Casablanca
Africa/Ceuta
Africa/Conakry
Africa/Dakar
Africa/Dar_es_Salaam
Africa/Djibouti
Africa/Douala
Africa/El_Aaiun
Africa/Freetown
Africa/Gaborone
Africa/Harare
Africa/Johannesburg
Africa/Juba
Africa/Kampala
Africa/Khartoum
Africa/Kigali
Africa/Kinshasa
Africa/Lagos
Africa/Libreville
Africa/Lome
Africa/Luanda
Africa/Lubumbashi
Africa/Lusaka
Africa/Malabo
Africa/Maputo
Africa/Maseru
Africa/Mbabane
Africa/Mogadishu
Africa/Monrovia
Africa/Nairobi
Africa/Ndjamena
Africa/Niamey
Africa/Nouakchott
Africa/Ouagadougou
Africa/Porto-Novo
Africa/Sao_Tome
Africa/Tripoli
Africa/Tunis
Africa/Windhoek
America/Adak
America/Anchorage
America/Anguilla
America/Antigua
America/Araguaina
America/Argentina/Buenos_Aires
America/Argentina/Catamarca
America/Argentina/Cordoba
America/Argentina/Jujuy
America/Argentina/La_Rioja
America/Argentina/Mendoza
America/Argentina/Rio_Gallegos
America/Argentina/Salta
America/Argentina/San_Juan
America/Argentina/San_Luis
America/Argentina/Tucuman
America/Argentina/Ushuaia
America/Aruba
America/Asuncion
America/Atikokan
America/Bahia
America/Bahia_Banderas
America/Barbados
America/Belem
America/Belize
America/Blanc-Sablon
America/Boa_Vista
America/Bogota
America/Boise
America/Cambridge_Bay
America/Campo_Grande
America/Cancun
America/Caracas
America/Cayenne
America/Cayman
America/Chicago
America/Chihuahua
America/Ciudad_Juarez
America/Costa_Rica
America/Creston
America/Cuiaba
America/Curacao
America/Danmarkshavn
America/Dawson
America/Dawson_Creek
America/Denver
America/Detroit
America/Dominica
America/Edmonton
America/Eirunepe
America/El_Salvador
America/Fort_Nelson
America/Fortaleza
America/Glace_Bay
America/Goose_Bay
America/Grand_Turk
America/Grenada
America/Guadeloupe
America/Guatemala
America/Guayaquil
America/Guyana
America/Halifax
America/Havana
America/Hermosillo
America/Indiana/Indianapolis
America/Indiana/Knox
America/Indiana/Marengo
America/Indiana/Petersburg
America/Indiana/Tell_City
America/Indiana/Vevay
America/Indiana/Vincennes
America/Indiana/Winamac
America/Inuvik
America/Iqaluit
America/Jamaica
America/Juneau
America/Kentucky/Louisville
America/Kentucky/Monticello
America/Kralendijk
America/La_Paz
America/Lima
America/Los_Angeles
America/Lower_Princes
America/Maceio
America/Managua
America/Manaus
America/Marigot
America/Martinique
America/Matamoros
America/Mazatlan
America/Menominee
America/Merida
America/Metlakatla
America/Mexico_City
America/Miquelon
America/Moncton
America/Monterrey
America/Montevideo
America/Montserrat
America/Nassau
America/New_York
America/Nome
America/Noronha
America/North_Dakota/Beulah
America/North_Dakota/Center
America/North_Dakota/New_Salem
America/Nuuk
America/Ojinaga
America/Panama
America/Paramaribo
America/Phoenix
America/Port-au-Prince
America/Port_of_Spain
America/Porto_Velho
America/Puerto_Rico
America/Punta_Arenas
America/Rankin_Inlet
America/Recife
America/Regina
America/Resolute
America/Rio_Branco
America/Santarem
America/Santiago
America/Santo_Domingo
America/Sao_Paulo
America/Scoresbysund
America/Sitka
America/St_Barthelemy
America/St_Johns
America/St_Kitts
America/St_Lucia
America/St_Thomas
America/St_Vincent
America/Swift_Current
America/Tegucigalpa
America/Thule
America/Tijuana
America/Toronto
America/Tortola
America/Vancouver
America/Whitehorse
America/Winnipeg
America/Yakutat
Antarctica/Casey
Antarctica/Davis
Antarctica/DumontDUrville
Antarctica/Macquarie
Antarctica/Mawson
Antarctica/McMurdo
Antarctica/Palmer
Antarctica/Rothera
Antarctica/Syowa
Antarctica/Troll
Antarctica/Vostok
Arctic/Longyearbyen
Asia/Aden
Asia/Almaty
Asia/Amman
Asia/Anadyr
Asia/Aqtau
Asia/Aqtobe
Asia/Ashgabat
Asia/Atyrau
Asia/Baghdad
Asia/Bahrain
Asia/Baku
Asia/Bangkok
Asia/Barnaul
Asia/Beirut
Asia/Bishkek
Asia/Brunei
Asia/Chita
Asia/Choibalsan
Asia/Colombo
Asia/Damascus
Asia/Dhaka
Asia/Dili
Asia/Dubai
Asia/Dushanbe
Asia/Famagusta
Asia/Gaza
Asia/Hebron
Asia/Ho_Chi_Minh
Asia/Hong_Kong
Asia/Hovd
Asia/Irkutsk
Asia/Jakarta
Asia/Jayapura
Asia/Jerusalem
Asia/Kabul
Asia/Kamchatka
Asia/Karachi
Asia/Kathmandu
Asia/Khandyga
Asia/Kolkata
Asia/Krasnoyarsk
Asia/Kuala_Lumpur
Asia/Kuching
Asia/Kuwait
Asia/Macau
Asia/Magadan
Asia/Makassar
Asia/Manila
Asia/Muscat
Asia/Nicosia
Asia/Novokuznetsk
Asia/Novosibirsk
Asia/Omsk
Asia/Oral
Asia/Phnom_Penh
Asia/Pontianak
Asia/Pyongyang
Asia/Qatar
Asia/Qostanay
Asia/Qyzylorda
Asia/Riyadh
Asia/Sakhalin
Asia/Samarkand
Asia/Seoul
Asia/Shanghai
Asia/Singapore
Asia/Srednekolymsk
Asia/Taipei
Asia/Tashkent
Asia/Tbilisi
Asia/Tehran
Asia/Thimphu
Asia/Tokyo
Asia/Tomsk
Asia/Ulaanbaatar
Asia/Urumqi
Asia/Ust-Nera
Asia/Vientiane
Asia/Vladivostok
Asia/Yakutsk
Asia/Yangon
Asia/Yekaterinburg
Asia/Yerevan
Atlantic/Azores
Atlantic/Bermuda
Atlantic/Canary
Atlantic/Cape_Verde
Atlantic/Faroe
Atlantic/Madeira
Atlantic/Reykjavik
Atlantic/South_Georgia
Atlantic/St_Helena
Atlantic/Stanley
Australia/Adelaide
Australia/Brisbane
Australia/Broken_Hill
Australia/Darwin
Australia/Eucla
Australia/Hobart
Australia/Lindeman
Australia/Lord_Howe
Australia/Melbourne
Australia/Perth
Australia/Sydney
Canada/Atlantic
Canada/Central
Canada/Eastern
Canada/Mountain
Canada/Newfoundland
Canada/Pacific
Europe/Amsterdam
Europe/Andorra
Europe/Astrakhan
Europe/Athens
Europe/Belgrade
Europe/Berlin
Europe/Bratislava
Europe/Brussels
Europe/Bucharest
Europe/Budapest
Europe/Busingen
Europe/Chisinau
Europe/Copenhagen
Europe/Dublin
Europe/Gibraltar
Europe/Guernsey
Europe/Helsinki
Europe/Isle_of_Man
Europe/Istanbul
Europe/Jersey
Europe/Kaliningrad
Europe/Kirov
Europe/Kyiv
Europe/Lisbon
Europe/Ljubljana
Europe/London
Europe/Luxembourg
Europe/Madrid
Europe/Malta
Europe/Mariehamn
Europe/Minsk
Europe/Monaco
Europe/Moscow
Europe/Oslo
Europe/Paris
Europe/Podgorica
Europe/Prague
Europe/Riga
Europe/Rome
Europe/Samara
Europe/San_Marino
Europe/Sarajevo
Europe/Saratov
Europe/Simferopol
Europe/Skopje
Europe/Sofia
Europe/Stockholm
Europe/Tallinn
Europe/Tirane
Europe/Ulyanovsk
Europe/Vaduz
Europe/Vatican
Europe/Vienna
Europe/Vilnius
Europe/Volgograd
Europe/Warsaw
Europe/Zagreb
Europe/Zurich
GMT
Indian/Antananarivo
Indian/Chagos
Indian/Christmas
Indian/Cocos
Indian/Comoro
Indian/Kerguelen
Indian/Mahe
Indian/Maldives
Indian/Mauritius
Indian/Mayotte
Indian/Reunion
Pacific/Apia
Pacific/Auckland
Pacific/Bougainville
Pacific/Chatham
Pacific/Chuuk
Pacific/Easter
Pacific/Efate
Pacific/Fakaofo
Pacific/Fiji
Pacific/Funafuti
Pacific/Galapagos
Pacific/Gambier
Pacific/Guadalcanal
Pacific/Guam
Pacific/Honolulu
Pacific/Kanton
Pacific/Kiritimati
Pacific/Kosrae
Pacific/Kwajalein
Pacific/Majuro
Pacific/Marquesas
Pacific/Midway
Pacific/Nauru
Pacific/Niue
Pacific/Norfolk
Pacific/Noumea
Pacific/Pago_Pago
Pacific/Palau
Pacific/Pitcairn
Pacific/Pohnpei
Pacific/Port_Moresby
Pacific/Rarotonga
Pacific/Saipan
Pacific/Tahiti
Pacific/Tarawa
Pacific/Tongatapu
Pacific/Wake
Pacific/Wallis
US/Alaska
US/Arizona
US/Central
US/Eastern
US/Hawaii
US/Mountain
US/Pacific
UTC
Sauver
Europe/Paris
Français
Deutsch (Deutschland)
English (United Kingdom)
English (United States)
Español (España)
Français (France)
Italiano (Italia)
Polski (Polska)
Português (Brasil)
Türkçe (Türkiye)
Čeština (Česko)
Монгол (Монгол)
Українська (Україна)
中文 (中国)
S'authentifier
Low Velocity Flows
de
jeudi 5 novembre 2015 (09:00)
à
vendredi 6 novembre 2015 (17:30)
lundi 2 novembre 2015
mardi 3 novembre 2015
mercredi 4 novembre 2015
jeudi 5 novembre 2015
09:00
Welcome
Welcome
09:00 - 09:45
Room: Amphi Lavoisier A, 3rd floor
09:45
Mathematical analysis of low Mach number flows for some single and two phase models
-
Benoit Desjardins
(
FMJH
)
Mathematical analysis of low Mach number flows for some single and two phase models
Benoit Desjardins
(
FMJH
)
09:45 - 10:30
Room: Amphi Lavoisier A, 3rd floor
There has been a lot of progress in the last 10 years for the mathematical analysis of low Mach number flows in the case of single phase flows. Similar questions can be raised in the two phase framework, where one or the two phases are slightly compressible: this talk presents some of the additional difficulties of low Mach number analysis for two phase compressible models, which are widely used in industrial applications. Only one pressure four equations models will be considered (no temperature equations).
10:30
Coffee break
Coffee break
10:30 - 11:00
Room: Couloir Lavoisier, 3rd floor
11:00
Low Mach number flow in plate-type fuel cores
-
Anne Charmeau
(
DEN/DANS/DM2S, CEA Saclay
)
Low Mach number flow in plate-type fuel cores
Anne Charmeau
(
DEN/DANS/DM2S, CEA Saclay
)
11:00 - 11:45
Room: Amphi Lavoisier A, 3rd floor
11:45
High temperature thermalhydraulics modeling of a Molten salt: application to the molten salt nuclear reactor
-
Pablo Rubiolo
(
IN2P3, CNRS Grenoble
)
High temperature thermalhydraulics modeling of a Molten salt: application to the molten salt nuclear reactor
Pablo Rubiolo
(
IN2P3, CNRS Grenoble
)
11:45 - 12:30
Room: Amphi Lavoisier A, 3rd floor
An overview of the ongoing efforts in the area of the thermal-hydraulics modeling of a Molten Salt Fast Reactor (MSFR) is presented. The MFSR employs a flowing liquid fuel based on a high temperature lithium fluoride salt. A molten fuel salt flow can be considered in many situations as an incompressible flow (low Match). However, several phenomena intrinsic to a molten fuel salt flow posse unique challenges (radiative heat transfer, volumetric heat source, phase change, strong neutronics feedbacks, etc.). To study some of these phenomena and to improve current CFD models an experimental facility called SWATH (Salt at WAll: Thermal ExcHanges) will be built as part of the European project SAMOFAR (2015-2019).
12:30
Lunch
Lunch
12:30 - 14:00
Room: Espace Turing, 7th floor
14:00
On the stability of IMEX schemes for singular hyperbolic PDE's
-
Sebastian Noelle
(
RWTH Aachen, Germany
)
On the stability of IMEX schemes for singular hyperbolic PDE's
Sebastian Noelle
(
RWTH Aachen, Germany
)
14:00 - 14:45
Room: Amphi Lavoisier A, 3rd floor
I will discuss systems of conservation laws where some wave speeds become singular. The classic example is the low Mach number limit in gas dynamics. In the singular limit, hyperbolicity gets lost, and near the limit, explicit time discretizations become either inefficient or unstable, both due to the CFL condition. The established concept to design efficient and stable algorithms near the singular limit is a time-Implicit-Explicit splitting, called IMEX. The recent asymptotic preserving (AP) IMEX schemes are consistent with the singular limit. A key question is the asymptotic stability of these schemes. I discuss two examples: a well-known, but unstable, scheme, and an also well-known, but stable scheme. Then I present a new stability analysis for IMEX schemes, which explains the outcomes of these experiments. I also give an outlook to a new concept of splittings, the so called RS-IMEX schemes (Reference Solution IMEX), and first aplications.
14:45
CDMATH library and low-Mach models applied to two-phase flows with Adaptive Mesh Refinement
-
Anouar Mekkas
(
DEN/DANS/DM2S, CEA SAclay
)
Arthur Talpaert
(
DEN/DANS/DM2S, CEA Saclay & CMAP
)
CDMATH library and low-Mach models applied to two-phase flows with Adaptive Mesh Refinement
Anouar Mekkas
(
DEN/DANS/DM2S, CEA SAclay
)
Arthur Talpaert
(
DEN/DANS/DM2S, CEA Saclay & CMAP
)
14:45 - 15:30
Room: Amphi Lavoisier A, 3rd floor
This work presents the incremental implementation of the simulation of two-phase flows in low-Mach conditions, particularly for dilating bubbles in a nuclear core. We use CDMATH, a new easy-to-use and open-source library, which relies on the rich MED Coupling library for powerful visualization. We provide simple tools for patch-based Adaptive Mesh Refinement (AMR) designed with parallel and balanced computing in mind. With AMR, we refined the coarse mesh on a set of patches in order to locally improve the precision in regions of interest and such that we finely capture changes located at the interface. The models we present are simplified but necessary steps to obtain efficient simulation of the incompressible Navier-Stokes model and of the low Mach model with interface. This research is a joint work together with Grégoire Allaire, Stéphane Dellacherie and Samuel Kokh. It is sponsored by the CEA (French Atomic Energy Commission) and the DGA (French ministry of defense).
15:30
Coffee Break
Coffee Break
15:30 - 16:00
Room: Couloir Lavoisier, 3rd floor
16:00
An Asymptotic Preserving scheme in the low-Mach number limit for the Euler system
-
Marie-Hélène Vignal
(
IMT, Université Toulouse 3
)
An Asymptotic Preserving scheme in the low-Mach number limit for the Euler system
Marie-Hélène Vignal
(
IMT, Université Toulouse 3
)
16:00 - 16:45
Room: Amphi Lavoisier A, 3rd floor
I am interested in the so-called Asymptotic preserving schemes. These schemes are well known to be well adapted for the resolution of multiscale problems in which several regimes are present. I will present the particular case of the low Mach number limit for the Euler system. We recall that when the Mach number tends to zero, the pressure waves are very fast and this yields the fluid incompressible. When a standard explicit finite volume scheme is used, it is well known that its time step is constrained by the C.F.L. (Courant-Friedrichs, Levy) condition. In the low Mach number regime, this leads to time steps invertely proportional to the very large pressure waves velocity. Thus, explicit schemes suffer from a severe numerical constraint in low-Mach regimes. Furthermore, these schemes are not consistent in this regime. This means that they do not capture the incompressible limit even if they are used with constrained meshes. Then, it is necessary to develop new schemes for bypassing these limitations. These new schemes must be stable and consistent in all regimes: from low Mach numbers to order one Mach numbers. I will show how to construct such a scheme for the Euler system and I will present numerical results showing the good behavior of these schemes in all regimes.
16:45
A low Mach correction for the Godunov scheme applied to the linear wave equation with porosity
-
Jonathan Jung
(
EFREI
)
A low Mach correction for the Godunov scheme applied to the linear wave equation with porosity
Jonathan Jung
(
EFREI
)
16:45 - 17:30
Room: Amphi Lavoisier A, 3rd floor
We study the low Mach number behavior of the Godunov finite volume scheme applied to the linear wave equation with porosity. More precisely, we extend the Hodge decomposition to a weighted L^2 space. We illustrate the influence of the cell geometry on the accuracy property at low Mach number. In the triangular case, the stationary space of the Godunov scheme approaches well enough the continuous space of constant pressure and divergent-free velocity while this is not the case in the cartesian case. We study the properties of the modified equation associated to this Godunov scheme and we propose some correction that is continuous with respect to the Mach number.
17:30
Free session
Free session
17:30 - 18:00
Room: Couloir Lavoisier, 3rd floor
18:00
Cocktail
Cocktail
18:00 - 20:00
Room: Espace Turing, 7th floor
vendredi 6 novembre 2015
09:00
On some models for bifluid flows
-
Didier BRESCH
(
Université de Savoie
)
On some models for bifluid flows
Didier BRESCH
(
Université de Savoie
)
09:00 - 09:45
Room: Amphi Lavoisier A, 3rd floor
In this talk I will discuss some low Mach number systems for bifluid flows. More precisely I will focus on mathematical structures for systems used for bilayer shallow-water flows in a fixed channel or incompressible bifluid models and mixture systems used for instance for pollutant spreading or aerated avalanches (miscible flows). This corresponds respectively to joint works with M. Renardy and with V. Giovangigli, E. Zatorska.
09:45
Session poster
Session poster
09:45 - 10:30
Room: Amphi Lavoisier A, 3rd floor
10:30
Coffee break
Coffee break
10:30 - 11:00
Room: Couloir Lavoisier, 3rd floor
11:00
An all-regime Lagrange-Projection like scheme for 2D homogeneous models for two-phase flows on unstructured meshes
-
Mathieu Girardin
(
CMAP, Ecole Polytechnique
)
An all-regime Lagrange-Projection like scheme for 2D homogeneous models for two-phase flows on unstructured meshes
Mathieu Girardin
(
CMAP, Ecole Polytechnique
)
11:00 - 11:45
Room: Amphi Lavoisier A, 3rd floor
We propose an all regime Lagrange-Projection like numerical scheme for 2D homogeneous models for two-phase flows. By all regime, we mean that the numerical scheme is able to compute accurate approximate solutions with an under-resolved discretization, i.e. a mesh size and time step much bigger than the Mach number M of the mixture. The key idea is to decouple acoustic, transport and phase transition phenomenon using a Lagrange-Projection decomposition in order to treat implicitly (fast) acoustic and phase transition phenomenon and explicitly the (slow) transport phenomena. Then, extending a strategy developed in the case of the usual gas dynamics equations, we alter the numerical flux in the acoustic approximation to obtain an uniform truncation error in term of M. This modified scheme is conservative and endowed with good stability properties with respect to the positivity of the density and preserving the mass fraction within the interval (0,1). Numerical evidences are proposed and show the ability of the scheme to deal with tests where the flow regime may vary from low to high Mach values.
11:45
Low-velocity scheme for hyperbolic conservation laws with constrains
-
Martin Parisot
(
ANGE, Inria Paris Rocquencourt
)
Low-velocity scheme for hyperbolic conservation laws with constrains
Martin Parisot
(
ANGE, Inria Paris Rocquencourt
)
11:45 - 12:30
Room: Amphi Lavoisier A, 3rd floor
This talk is devoted to the numerical approximation of first order conservation laws under constraints. The proposed strategy is based on a relaxation of the constraints in order to get a system of hyperbolic conservation laws. However, the new system have to be considerate at the limit of the relaxation parameter goes to zero to ensure the (formal) consistency with the initial model. We will explain how this limit is analogous to a low-Mach asymptotic and we will propose several examples and illustrations.
12:30
Lunch
Lunch
12:30 - 14:00
Room: Espace Turing, 7th floor
14:00
Low Mach Number Modeling of Stratified Astrophysical Flows
-
Ann Almgren
(
Lawrence Berkeley Lab, USA
)
Low Mach Number Modeling of Stratified Astrophysical Flows
Ann Almgren
(
Lawrence Berkeley Lab, USA
)
14:00 - 14:45
Room: Amphi Lavoisier A, 3rd floor
Computational astrophysics has traditionally relied on discretizations of either the fully compressible equations for fluid dynamics, or the anelastic approximation, supplemented by equations describing the thermonuclear reactions and heat release. The low Mach number formulation, like the anelastic approximation, analytically removes acoustic wave propagation from the system. However, the more general low Mach number approach retains nonlinear compressibility effects resulting from nuclear burning, compositional changes and changing radial stratification. This model is a generalization of the pseudo-incompressible approximation to systems with a non-ideal gas equation of state and a time-varying base state. I will discuss the derivation of the low Mach number equation set for astrophysics, focusing on the similarities with and differences from numerical models of the Earth's atmosphere.
14:45
Turbulent kinetic energy transfers in low-Mach wall-bounded flows
-
Adrien Toutant
(
PROMES, Université de Perpignan
)
Turbulent kinetic energy transfers in low-Mach wall-bounded flows
Adrien Toutant
(
PROMES, Université de Perpignan
)
14:45 - 15:30
Room: Amphi Lavoisier A, 3rd floor
The context of the study is high temperature solar receivers (SR). The main characteristics of flow inside a SR are turbulence (because flow rates are important) and temperature gradient (because only one face of the SR receives concentrated sunlight). A specific algorithm for the resolution of low-Mach equations is proposed in order to improve mass and energy conservations. Direct numerical simulations (DNS) of a simplified solar receiver in a bi-periodic plane channel are carried out in order to analyze the coupling between turbulence and temperature gradients. The results show that the temperature gradient creates asymmetric profiles of mean and fluctuating velocities. This asymmetry cannot only be explained by the fluid property variations as a function of temperature. It is truly related to the coupling of velocity / temperature, which mainly leads to an increase of the turbulent intensity at the cold side and to its decrease at the hot side. The analysis of the turbulent kinetic energy in the physical and in the spectral domains shows that temperature gradient changes the mechanisms of production, transfer and dissipation.
15:30
Coffee break
Coffee break
15:30 - 16:00
Room: Couloir Lavoisier, 3rd floor
16:00
Asymptotic limits of the Shallow Water equations
-
Carine Lucas
(
MAPMO, Université d'Orléans
)
Asymptotic limits of the Shallow Water equations
Carine Lucas
(
MAPMO, Université d'Orléans
)
16:00 - 16:45
Room: Amphi Lavoisier A, 3rd floor
In this talk, I will explain the asymptotic limits that can be obtained from the Shallow Water equations. In the Shallow Water equations, the values of two non-dimensional numbers (the Strouhal and the Froude numbers) can be chosen in order to catch various physical phenomena. We will see that, depending on the links between the Strouhal number, the Froude number, and the scales of the topography, we get other well-known equations such as the "Lake equation" for example. This work has been done in collaboration with Didier Bresch (LAMA, Université de Savoie, France) and Rupert Klein (Free University of Berlin, Germany).
16:45
Godunov type schemes for low Froude flows with Coriolis force
-
Emmanuel Audusse
(
LAGA, Université Paris 13
)
Godunov type schemes for low Froude flows with Coriolis force
Emmanuel Audusse
(
LAGA, Université Paris 13
)
16:45 - 17:30
Room: Amphi Lavoisier A, 3rd floor
in this talk, we are interested in the numerical simulation of free surface geophysical flows. Our objective is to study the relation between two well known categories of numerical schemes: the well-balanced schemes that are designed to preserve some stationary states of the model and the low Froude number schemes that are designed to remain accurate in some asymptotic regime. We study two particular cases that are related to the presence of topography and Coriolis source terms. More particularly we analyze the linearized system in order to identify the kernel of the associated operator and to derive stable and accurate numerical schemes.