Dr. Ethar A. Abdel Salam

Assistant Professor

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Dr Ethar Ahmed is an assistant professor in the School of Engineering and applied sciences at Nile University. She obtained her PhD in applied mathematics from Cairo University in 2020 where she studied thermo-Piezo Elasticity of Continuous Media with Microstructure, within the Frame of Extended Thermodynamics. Prior to her PhD, she obtained her BSc. in special Mathematics from the faculty of science, Al-Azhar University and her MSc in applied mathematics from the faculty of Science at Zagazig University. Dr Ethar research interests center around continuum mechanics and thermoelasticity. She has more than 17 peer reviewed research articles published in top-tier journals and she has been serving as a reviewer in the top journals of the field. During the summer of 2023, she was a visiting researcher in the Electrical Engineering Dept. at Stanford University where she worked on developing a theoretical model for transparent piezoelectric transducers for neuron stimulation applications. She has participated in several scientific conferences including the 8th International Scientific Conference (Environment, Development and Bioinformatic), the 8th International Conference on Mathematics and Information Sciences and the International Mathematics Day- Mathematics for Development. Dr Ethar teaches several core undergraduate courses at Nile University and has been an active member in many student research activities. She served as a jury member in the Egyptian Junior Researcher Competition and she mentors and guides the next generation of researchers and engineers develop creative projects and publish their work in conferences and scientific journals. She is also a member of the Egyptian Mathematical Society and the Egyptian Women in Mathematics society.

  • Dr. Ethar won Obada Prize 2020 for Distinguished Students.
  • She won the Best Ph.D. Thesis Award in "Applied Mathematics" from the Egyptian Mathematical Society for the year 2021.
  • She also won the Best Research Award for Egyptian Young Researchers at the Fourth International Conference for Mathematics and its Applications, 2021.
Recent Publications

Magnetic field effect on piezo-thermoelastic wave propagation in a half-space within dual-phase-lag

The current work is concerned with the study of wave propagation in a half-space of a piezo-thermoelastic material under a bias tangential magnetic field within dual-phase-lag (DPL). This is relevant to the design and performance of piezoelectric devices working under a bias magnetic field, for example, the DC magnetic field piezoelectric sensors widely used in various areas of technology. The

Energy and Water

Thermoelastic wave propagation in a piezoelectric layered half-space within the dual-phase-lag model

We investigate linear, thermoelastic wave propagation in a layered piezoelectric material composed of a slab bonded to a half-space substrate of a dissimilar material, within dual-phase-lag model and under thermomechanical loads. One of the aims of the present work is to formulate a set of boundary conditions that is compatible with the field equations. Normal mode technique is used to obtain a

Energy and Water

Numerical solution to a 2D-problem of piezo-thermoelasticity in a quarter-space within the dual-phase-lag model

We present a numerical solution by finite differences to a linear, plane, initial-boundary-value problem of thermo-piezoelasticity in a quarter-space, within the dual-phase-lag model. Motion is excited by a one-period heat regime applied to one boundary of the medium. The relation between the two relaxation times is clarified in order to obtain wave-like solutions. An explicit, three-level

Mechanical Design

Two-dimensional heat conduction in a rigid thermal conductor within the dual-phase-lag model by one-sided Fourier transform

An exact analytical solution in closed form is obtained for a two-dimensional initial-boundary-value problem of heat wave propagation in a thick slab of an anisotropic rigid thermal conductor within the dual-phase-lag model. One-sided Fourier transform technique is used to obtain a formal solution. The method requires an essential change of the dependent variable in order to guarantee a suitable

Energy and Water
Software and Communications

Piezothermoelasticity in an infinite slab within the dual-phase-lag model

The system of equations of the generalized piezothermoelasticity in anisotropic medium with dual-phase-lag model is established. The exact expressions for displacement components, the temperature, stress components, electric potential and electric displacements are given in the physical domain and illustrated graphically. These expressions are calculated numerically for the problem. Comparisons

Mechanical Design