24-066 Atomization of a Swirled Liquid Jet By An
Il y a 2 mois
Doctorat, 36 mois
- Temps plein
- Aucune expérience exigée
- Maitrise, IEP, IUP, Bac+4
- Propulsion
**Mission**:
In the first phase, we propose to study the destabilization of a swirled liquid jet by a fast air stream (coaxial injector) and the ensuing spray formation in conditions of high Reynolds and Weber numbers at LEGI. The experiments will be carried out by the Ph.D. student under the supervision of N. Machicoane, an expert in liquid atomization (Kaczmarek et al. IJMF 2022, Machicoane et al. IJMF 2020), with solid expertise in the experimental characterization of sprays and swirled atomization. The first aim of these experiments will be to characterize the physics of atomization in these conditions: it has been shown recently that three destabilizing mechanisms competed in typical atomization conditions (Matas et al. JFM 2018). Among these, the mechanism controlling destabilization in the LOX/CH4 case in the presence of swirl remains undetermined. This question is crucial since only knowing which physical process controls fragmentation can tell which dimensionless number ultimately pilots spray formation and droplet size: is it the gas-to-liquid kinetic energy ratio? The Reynolds? The Weber? The injector geometry via the impact of jet confinement (especially in the presence of a recess between the oxidizer post and the injection plane)? Several geometry variations will be implemented after thoroughly probing the parameter space in the available geometry. Their effects on spray formation processes will be characterized in regions of interest in the parameter space. In addition, modeling efforts will be carried out with the help of/in collaboration with J-P. Matas (LMFA) a recognized expert on jet atomization (Matas JFM 2015) who is already familiar with swirled injection (Matas et al. Phys. Fluids 2013).
The cryogenic spray will ultimately be characterized by advanced experimental methods: Phase Doppler anemometry, optical fiber probes, and holography, with which the present partners are familiar. Finally, in high-speed conditions for large swirl numbers, the expected very optically dense nature of the two-phase flow at the atomizer exit will be tackled using Synchrotron X-ray high-speed imaging (Machicoane et al. IJMF 2019). The combination of experimental methods and the joint skills of the involved consortium will allow for the study of the complete picture of spray formation processes.
=================
**Profil**:
Hydrodynamics, nonlinear physics, experimental physics
Nous avons d'autres emplois actuels liés à ce domaine que vous pouvez trouver ci-dessous
-
Thèse : Atomisation D'un Jet de Liquide Par Un
il y a 2 semaines
Grenoble, France CNRS Temps pleinCette offre est disponible dans les langues suivantes: - Français - Anglais Date Limite Candidature : mercredi 3 juillet 2024 23:59:00 heure de Paris **Informations générales**: **Intitulé de l'offre **:Thèse : Atomisation d'un jet de liquide par un flux de gaz à ultra-haute vitesse (H/F)** Référence : UPR2940-ELOBER-102 Nombre de Postes : 1 Lieu...
-
Regeneration of Ionic Liquid Coming From Precious
il y a 3 semaines
Grenoble, France CEA - Commissariat à l'Energie Atomique Temps plein**Domaine**: Chimie **Contrat**: Post-doctorat **Intitulé de l'offre**: Regeneration of ionic liquid coming from precious metals recycling process H/F **Sujet de stage**: Regeneration of ionic liquid coming from precious metals recycling process **Durée du contrat (en mois)**: 18 mois **Description de l'offre**: The French government has set-up the...
-
Regeneration of Ionic Liquid Coming From Precious
il y a 3 semaines
Grenoble, France CEA Temps pleinDescription du poste **Domaine**: - Chimie **Contrat**: - Post-doctorat **Intitulé de l'offre**: - Regeneration of ionic liquid coming from precious metals recycling process H/F **Sujet de stage**: - Regeneration of ionic liquid coming from precious metals recycling process **Durée du contrat (en mois)**: - 18 mois **Description de l'offre**: -...
-
24-339 Study of The Thermal Performances of a
il y a 4 jours
Grenoble, France CNES - Centre National d'Etudes Spatiales Temps pleinDoctorat, 36 mois - Temps plein - Aucune expérience exigée - Maitrise, IEP, IUP, Bac+4 - Mechanical and thermal engineering **Mission**: Societal context: Next-generation astrophysics or earth observation satellites use cryocoolers to cool detectors to cryogenic temperatures. These low temperatures make it possible to achieve unequaled sensitivities,...
-
Grenoble, France CNRS Temps pleinInformations générales Intitulé de l'offre : Thèse : Atomisation d'un jet de liquide par un flux de gaz à ultra-haute vitesse (H/F) Référence : UPR2940-ELOBER-102 Nombre de Postes : 1 Lieu de travail : GRENOBLE Date de publication : mercredi 12 juin 2024 Type de contrat : CDD Doctorant/Contrat doctoral Durée du contrat : 36 mois Date de...
-
Group Leader of Numerical Liquid Metal
il y a 1 semaine
Grenoble, France Renaissance Fusion Temps pleinWe are looking for a Group leader of numerical liquid metal magnetohydrodynamic (LMMHD) to manage the activities of the numerical LMMHD group. In particular, this involves supervising the development of numerical tools and their use to predict, interpret and optimize free-surface liquid metal experiments and their interplay with fusion plasmas and solid...
-
Head of Heating, Diagnostics and Balance-Of-Plant department
il y a 3 jours
Grenoble, Auvergne-Rhône-Alpes, France Renaissance Fusion Temps pleinRenaissance Fusion is the first Magnetic Confinement Fusion company in the EU. We are building the first net-energy producing stellarator by combining proprietary innovations in modular design, the manufacturing of next-generation High-Temperature Superconducting (HTS) magnets, and liquid-metal (LM) walls. We are forming a team of the brightest, most driven...
-
Group Leader Liquid Metal Engineering
il y a 3 semaines
Grenoble, France Renaissance Fusion Temps pleinWe are looking for a Group leader of Liquid Metal (LM) Engineering to take part in the technical activities and oversee a team dedicated to thinking, designing and building LM systems, comprising a mechanical engineer, a control engineer, and a thermohydraulic engineer. The key to success lies in seamless integration with both the Experimental and the...
-
Head of Fusion Science
Il y a 2 mois
Grenoble, France Renaissance Fusion Temps pleinRenaissance Fusion is the first Magnetic Confinement Fusion company in the EU. We are building the first net-energy producing stellarator by combining proprietary innovations in modular design, the manufacturing of next-generation High-Temperature Superconducting (HTS) magnets, and liquid-metal (LM) walls. We are forming a team of the brightest, most driven...
-
Head of Heating, Diagnostics and Balance-of-plant
il y a 5 jours
Grenoble, France Renaissance Fusion Temps pleinRenaissance Fusion is the first Magnetic Confinement Fusion company in the EU. We are building the first net-energy producing stellarator by combining proprietary innovations in modular design, the manufacturing of next-generation High-Temperature Superconducting (HTS) magnets, and liquid-metal (LM) walls. We are forming a team of the brightest, most driven...
-
Cmos/spintronics Co-design of a Coupling Chip for
Il y a 2 mois
Grenoble, France CEA - Commissariat à l'Energie Atomique Temps plein**General information**: **Organisation **:The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas: - defence and security, - nuclear energy (fission and fusion), - technological research for industry, - fundamental research in the physical sciences and life...
-
Grenoble, Auvergne-Rhône-Alpes, France Institut pour l'avancée des Biosciences -Centre de Recherche UGA Inserm U 1209 CNRS UMR 5309 Temps plein2 Dec 2023Job Information Organisation/CompanyInstitut pour l'avancée des Biosciences -Centre de Recherche UGA / Inserm U 1209 / CNRS UMR 5309Research FieldBiological sciences » BiologyResearcher ProfileRecognised Researcher (R2)Leading Researcher (R4)First Stage Researcher (R1)Established Researcher (R3)CountryFranceApplication Deadline29 Mar 2024 –...
-
Grenoble, Auvergne-Rhône-Alpes, France Institut pour l'avancée des Biosciences -Centre de Recherche UGA Inserm U 1209 CNRS UMR 5309 Temps plein2 Dec 2023Job Information Organisation/CompanyInstitut pour l'avancée des Biosciences -Centre de Recherche UGA / Inserm U 1209 / CNRS UMR 5309Research FieldBiological sciences » BiologyResearcher ProfileRecognised Researcher (R2)Leading Researcher (R4)First Stage Researcher (R1)Established Researcher (R3)CountryFranceApplication Deadline29 Mar 2024 –...
-
24-098 Protection of Coatings Against
il y a 4 jours
Grenoble, France CNES - Centre National d'Etudes Spatiales Temps pleinDoctorat, 36 mois - Temps plein - Aucune expérience exigée - Maitrise, IEP, IUP, Bac+4 - Exobiology, Planetary protection & Exoplanets **Mission**: In the context of long-duration crewed space missions to destinations such as Mars, the risk of biological contamination poses significant threats to crew health and equipment. This contamination primarily...
-
Development of Epitaxial Ga2o3 Thin Films for Next
Il y a 2 mois
Grenoble, France Université Grenoble Alpes Temps plein**Development of Epitaxial Ga2O3 Thin Films for Next Generation Power Electronics**: - Réf - **ABG-115622** - Sujet de Thèse- 04/07/2023- Contrat doctoral- Université Grenoble Alpes- Lieu de travail- Grenoble - Auvergne-Rhône-Alpes - France- Intitulé du sujet- Development of Epitaxial Ga2O3 Thin Films for Next Generation Power Electronics- Champs...
-
Multiscale Study of The Temperature-dependent
il y a 4 semaines
Grenoble, France Laboratoire 3SR Temps plein**Multiscale study of the temperature-dependent behavior of Calcium - Silicate-Hydrate**: - Réf - **ABG-112838** - Sujet de Thèse- 03/04/2023- Contrat doctoral- Laboratoire 3SR- Lieu de travail- Grenoble - Auvergne-Rhône-Alpes - France- Intitulé du sujet- Multiscale study of the temperature-dependent behavior of Calcium - Silicate-Hydrate- Champs...
-
Research Scientist
il y a 2 semaines
Grenoble, France ILL Temps plein**Research Scientist - Neutron Reflectometry - FIGARO** **Context** The LSS group comprises a range of instruments designed to carry out studies on the structure of matter on a scale of one to hundreds of nanometers and up to microns. The range of science covered is broad, from polymer and colloid science through structural biology, materials science and...
-
Development of a Robust Model for Accented Speech
Il y a 2 mois
Grenoble, France NAVER LABS Europe Temps pleinAutomatic speech recognition (ASR) systems have seen substantial improvements in the past decade, in particular with the advent of Self-supervised learning speech models; however, ASR systems do not recognize the speech of everyone equally well. Recent research shows that bias exists against different types of speech, including non-native and regional...
-
Biogas Solutions-process Risk Manager Representative
Il y a 2 mois
Grenoble, France Air Liquide Temps plein**Company presentation** World **leader in gases, technologies and services for Industry and Health**, Air Liquide is present in **80 countries** with approximately **65,000 employees and serves more than 3.5 million customers and patients. Oxygen, nitrogen and hydrogen** are essential small molecules for life, matter and energy. They embody Air Liquide’s...
-
Master By Apprenticeship in Data Lake and Ai for
il y a 3 semaines
Grenoble, France CEA - Commissariat à l'Energie Atomique Temps plein**Domaine**: Mathématiques, information scientifique, logiciel **Contrat**: Alternance **Durée du contrat (en mois)**: 10 **Description de l'offre**: The past 10 years, technological advances in DNA sequencers have enabled the generation of large amounts of genomic data stored in public data repositories. Research projects seeking to take advantage of...
