[Norway] PhD research fellowship – NTNU
PhD research fellowship in the field of “Nonlinear elastic waves for estimation of properties of technical and geologic materials”
Faculty of Engineering Science and Technology
Department of Petroleum Engineering and Applied Geophysics
PhD research fellowship in the field of “Nonlinear elastic waves for estimation of properties of technical and geologic materials”
The Department of Petroleum Engineering and Applied Geophysics announces one vacant PhD fellowship in the field of “Estimation of material and reservoir properties with nonlinear ultrasound”. The fellowship is financed by the PETROMAKS program of the Research Council of Norway.
Through transmission of multi frequency elastic wave pulse complexes, it is possible to estimate nonlinear elastic properties of materials from the scattered and transmitted elastic waves. The methods have amongst other been developed for medical ultrasound imaging at the Department of Medical Imaging, NTNU. Many technical materials show similar nonlinear elasticity, and in a preliminary project one have observed a high degree of nonlinear elasticity of porous rock. The new methods hence show interesting possibilities to extract material properties from technical and geologic materials which can be used to evaluate for example properties of oil and gas carrying porous rock, durability of materials under constant and varying strain, and material properties during production.
The current PhD project will address nonlinear acoustic wave propagation in technical and geologic materials, and the possibility to extract material information from the transmitted and scattered elastic waves from complex multi frequency pulses. The work will address mathematical modeling of elastic wave propagation in such nonlinear materials, experimental model verification, and design of signal processing schemes for information extraction. The project also finances support work for material testing at SINTEF Petroleum Research, design of ultrasound transducer arrays at CMR, Bergen, University of Bergen, and NTNU, and mathematical modeling of wave propagation and information extraction at NTNU.
Applicants should hold a Master Degree or equivalent, and shoul
