The VPFlows project is funded by the
**Agence Nationale de la Recherche**, as part of the AAPG 2020 (PRC) program in the CE 46 panel “Numerical models, simulations, applications”.

*Theme*: Challenging the numerical simulation of viscoplastic flows: cross-comparison with physical experiments

- Scientific start: Feb 1st, 2021
- End: Jan 31, 2026

- One PhD thesis in applied mathematics/HPC (starts Autumn 2022):
**this position is filled**. - One PhD thesis in fluid mechanics (starts Sept 2021):
**this position is filled**. - A few "Master 2" thesis (at LJK: contact P. Saramito)

- Paul Vigneaux, Scientific Coordinator of VPFlows, Scientific lead @ UMPA (
**www**) then LAMFA - David Coulette (IR CNRS), UMPA
- Guillaume Chambon, Scientific lead @ INRAE Grenoble (
**www**) - Hervé Bellot (IE INRAE), INRAE Grenoble
- Pierre Saramito, Scientific lead @ LJK Grenoble (
**www**) - Franck Perignon (IR CNRS), LJK Grenoble
- Pierre Philippe, Scientific lead @ INRAE Aix (
**www**) - Naim Chaouch (IE INRAE), INRAE Aix

- ENS de Lyon, UMPA (
**www**) then UPJV, LAMFA (**www**) - INRAE Grenoble, Team: ETNA → ECRINS (
**www**) - LJK Grenoble @ UGA (
**www**) - INRAE Aix, RECOVER (
**www**)

This project originates form previous programs of the CNRS through:

- TELLUS - INSMI (2016)
- Infiniti program of the Mission for Interdisciplinarity, MITI (2017, 2018)

**2020 12 16:** Kick-off meeting at the ANR (visio) for CE 46 projects (5' each). VPFlows made its speed-dating.

**2021 03 17:** Kick-off meeting of VPFlows Project with all team members. Visioconference due to sanitary conditions. It's on.

**2021 06 18:** Meeting with all team members to work on the Data Management Plan (DMP) and workflow for the VPFlows Project. Visioconference.

**2021 08 25:** The **INSMI** announces the creation of the **GdR CNRS MathGeoPhy** (Math for fluid and solid geophysical surface envelopes) from 2022 to 2026. VPFlows is quite involved in this GdR, notably with Pierre Saramito and Paul Vigneaux. Website is here

**2021 10 01:** **VPFlows** welcomes C. Berger (ENS Grant) and C. Ginot (ANR Grant) as two PhD students joining the project!

**2021 11 27:** **Popularization Action:** The Institute of Mathematics for Planet Earth (IMPT) was created in 2021. For the beginning of its activities, IMPT organized an inaugural event for a general public audience at the famous **Musée des Confluences** in Lyon: Paul Vigneaux and Guillaume Chambon were invited to present their work associated to the VPFlows project. They were one of the four groups invited to illustrate the fruitful interaction between mathematics and geophysics. More details here and there

**2021 12 13:** **Popularization Action:** "Mathematical evenings of Lyon" (a.k.a. SML, Soirées mathématiques de Lyon.) P. Vigneaux made a presentation on mathematical modelling of avalanches @ Ecole Centrale de Lyon. SML in brief: Created in 2012, they are primarily aimed at post-baccalaureate science students (in university, preparatory class, engineering school, etc.), but also at any interested public (amateurs, teachers, researchers, etc.). More details here and there

**2022 01 17:** Creation of the **GdR CNRS MathGeoPhy** (Math for fluid and solid geophysical surface envelopes) from 1.1.2022 for five years. INSMI press release here

**2022 09 01:** Paul Vigneaux is moving from Lyon to Amiens on a new full professor position at the LAMFA.

**2022 09 13:** **VPFlows** delivers **several talks** at the 14th European Fluid Mechanics Conference (13-16 September 2022, Athens - Greece). EFMC14

**2022 10 01:** **VPFlows** welcomes M. Wallon (ANR Grant) as a new PhD student joining the project at LAMFA in Amiens!

**2022 11 17:** **VPFlows** paper accepted in Cement & Concrete Research (IF: 11.958). DOI. HAL.

**2023 03 19:** **VPFlows** paper accepted in Computers and Mathematics with Applications. Preprint HAL. DOI.

**2023 06 16:** **Annual meeting of all the VPFlows team** at ENS de Lyon.

**2023 12 06:** Colin Ginot presents **a Poster** at the **3rd Fluids and Complexity** conference (6-8 December 2023, Nice - France). F&C III

**2023 12 20:** The **INSMI** announces the creation, from 2024 to 2028, of the **"Réseau thématique (RT) Terre & Énergies"** obtained by the concatenation of **GdR CNRS** MathGeoPhy (Math for fluid and solid geophysical surface envelopes) and **GdR CNRS MaNu**. VPFlows is quite involved in this Research Network and Paul Vigneaux is the Head of the Axis "Geophysics and natural hazards". Website is here

**2024 01 29:** **VPFlows** paper accepted in Rheologica Acta. Code repository (Zenodo). Preprint HAL. Preprint arXiv. DOI. Springer link.

**2024 02 27:** **Popularization Action:** "Conférence Flash @ UPJV" P. Vigneaux made a presentation on mathematical modelling of avalanches. "Flash" talks in brief: primarily aimed at post-baccalaureate Second Year Science students, they are also open to any interested public. More details here and there

**2024 02 29:** Pierre Saramito and Paul Vigneaux gave **two talks** at the **France-Western Canada Workshop on Ocean and Polar Sciences**, jointly organized by the **CNRS**, the Pacific Institute for the Mathematical Sciences (**PIMS**), and the **Consulate General of France in Vancouver**. This Workshop focused on quantitative approaches and analysis in this field. The main goal of the workshop is to identify shared research themes, to explore possibilities for new interactions, and to foster further cooperation between researchers in Canada and in France. Website is here

**2024 04 09:** Guillaume Chambon gives **a talk** at the **Annual European Rheology Conference** (9-12 April 2024, Leeds - UK). AERC24

**2024 04 15:** Colin Ginot gives **a talk** at the **EGU Gen. Assemb. 2024** conference (14-19 April 2024, Vienna - Austria). web

**2024 05 27:** **VPFlows** organizes a **MiniSymposium** on "*Mathematical Yield Stress Fluids*" at the **CANUM 2024** (27-31 May 2024, Île de Ré - France). web. Program (pdf).

**2024 09 27:** Clément Berger has successfully defended his **PhD thesis** at the **ENS de Lyon**. Congratulations! web

Simulation of a viscoplastic avalanche in the Taconnaz path, Mont-Blanc, France: (works fine on chrome navigator)

All publications of the project will be available on the HAL Open Archive Repository: the dedicated page is here or there (ANR portal).

The project provides a Data Management Plan (DMP) through DMP Opidor.

**Related web sites:**

Institut des Mathématiques pour la Planète Terre: a GIS of CNRS (officially created May 20th, 2021).

GdR CNRS EGRIN: Gravitational flows and Natural hazards. From 2013 to 2021. Then followed by MathGeoPhy →

GdR CNRS MathGeoPhy was created Jan 1st 2022. Math for fluid and solid geophysical surface envelopes. Then followed by Terre & Énergies →

RT CNRS Terre & Énergies was created Jan 1st 2024, after the "CNRS Mathematics" (INSMI)'s global reorganisation of its 29 GdR into 15 bigger "Réseaux Thématiques" (RT) in 2023-2024.