Disputation: Torstein Sæter

Doctoral candidate Torstein Sæter at the Department of Mathematics will be defending the thesis Elastohydrodynamic and viscoplastic thin film flows for the degree of Philosophiae Doctor.

picture of the candidate

Doctoral candidate Torstein Sæter.

The PhD defence will be in Abels utsikt - Niels Henrik Abels hus. The host of the session will moderate the technicalities while the chair of the defence will moderate the disputation.

Ex auditorio questions: the chair of the defence will invite the audience to ask questions ex auditorio at the end of the defence.

Submit request to access thesis (available from September 2nd 1:15 pm until September 16th 1:15 pm)

Trial lecture

September 2nd, time: 10:15 am, room 1259 (Abels utsikt).

Physics and stability of capillary-driven rafts of particles

Main research findings 

The understanding of how thin liquid films spread on solid substrates is cruical for various industrial and natural processes. For example, these flows can be observed in numerous geophysical phenomena, such as the spread of lava after a volcanic eruption, or as magma intrusions deform the overlying Earth's crust, leading to the formation of laccoliths. In the latter case, the pressure generated by the surface deformation causes the magma to spread horizontally beneath the surface, demonstrating an intricate coupling between the fluid flow and the elastic deformation. 

In this work I extend previous studies of such flows by considering viscoplastic fluid rheologies or novel flow geometries. Here, a viscoplastic rheology allows the fluid to be in either a solid or liquid state, a common behavior observed for geophysical fluids like lava or mud. Experiments, numerical simulations and theoretical scaling arguments are combined to describe the dynamics of the systems considered.

Adjudication committee

  • Professor Ian Hewitt, University of Oxford 
  • Professor Maria Fernandino, Norwegian University of Science and Technology
  • Associate Professor Ira Didenkulova, University of Oslo

Supervisors

  • Professor Andreas Carlson, University of Oslo
  • Researcher Olivier Galland, University of Oslo

Chair of defence

Professor Nils Henrik Risebro

Host of the session

Associate Professor Ira Didenkulova, University of Oslo

 

Organiser

Department of Mathematics
Published Sep. 2, 2024 8:09 AM - Last modified Oct. 23, 2025 1:13 PM