Multiphysics modelling of millimetre-wave ablation of geological materials

Friday, 12 June 2026, 12pm to 1pm

Abstract: Millimeter‑wave (mm‑wave) drilling is an emerging thermal rock‑removal technology with the potential to transform access to superhot geothermal resources beyond the reach of conventional mechanical drilling. By delivering electromagnetic energy directly to the rock face, mm‑wave irradiation induces rapid heating, thermal stress generation, and material removal through a combination of cracking, spallation, and melting. However, the efficiency and controllability of the process depend sensitively on rock composition, microstructure, confinement, and operating conditions.
In this talk, I will present recent advances in the modelling and experimental investigation of millimetre‑wave drilling. I will first provide an overview of the key mechanisms involved and explain how the process has been studied both experimentally and theoretically. Finally, I will outline our ongoing efforts to deploy this technology in the field, summarize our progress to date, and describe the upcoming tests.

Speaker(s): Dr Franck Monmont (Quaise Energy)

Venue: Department of Earth Sciences - Seminar rooms - Seminar rooms Department of Earth Sciences South Parks Road Oxford Oxfordshire OX1 3AN United Kingdom

Department: Earth Sciences (Department)

Register here: https://www.earth.ox.ac.uk/event/multiphysics-modelling-of-millimetre-wave-ablation-of-geological-materials