The microwave-drill thermal-runaway analysis

E. Jerby*, O. Aktushev, V. Dikhtyar

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review


The microwave-drill employs an open-end coaxial applicator generating a localized hot-spot in the drilled material. This paper presents a theoretical analysis of the coupled thermal-electromagnetic phenomena involved, whereas the material's temperature-dependent properties (e.g. the dielectric permittivity and thermal-conductivity variations) play a dominant role in the thermal-runaway evolution. The numerical simulation employs a finite-difference time-domain (FDTD) method in a cylindrical symmetry, The temporal and spatial temperature evolution profiles are simulated for mullite. The equivalent microwave-drill impedance is found as a lumped circuit with varying resistive and reactive components. This analysis is applicable for open-end coaxial microwave applicators in general.

Original languageEnglish
Number of pages1
StatePublished - 2004
Event2004 AIChE Annual Meeting - Austin, TX, United States
Duration: 7 Nov 200412 Nov 2004


Conference2004 AIChE Annual Meeting
Country/TerritoryUnited States
CityAustin, TX


Dive into the research topics of 'The microwave-drill thermal-runaway analysis'. Together they form a unique fingerprint.

Cite this