PhD Thesis in Industrial Dip-Coating Process Study

il y a 2 semaines


Paris, Île-de-France Groupe Français de Rhéologie Temps plein
Job Description

PhD Thesis in Industrial Dip-Coating Process Study

Context:

Dip-coating processes involve covering an object with a thin layer of liquid using sequences of immersion and removal at controlled speeds and trajectories. The layer thickness control depends heavily on previous steps and fluid rheology, which in turn affects the end-use target properties. Lost-foam casting, a foundry method used in modern engines, includes such coating techniques.

Goals and Planning:

The main goal of this PhD thesis is to understand, predict, and tune final deposited thicknesses on arbitrarily complex geometries by playing with bath rheology and object removal trajectories and speeds. An experimental and theoretical approach will be used to apprehend unitary mechanisms and instabilities at play when an object is covered by yield stress fluids and when it is immersed and removed by translation movement.

Methodology:

The experimental device will consist of a laboratory-scale robot arm capable of performing complex bath removal moves. Layer thickness measurements will be performed using local laser distance sensors for optimal precision and on-board cameras for global kinetics, dripping, and flow characterizations. Layers flow modeling will be implemented in a numerical simulation code.

Expected Outcomes:

This project will take place in the Center for Material Forming (Cemef) of Ecole des Mines de Paris – PSL University. Many stays and interactions are planned with Stellantis, the project industrial partner. The candidate will be part of Cemef Computing and Fluids research team.



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