Temperature dependent thermal conductivity during photothermal excitation process of semiconductor medium with an internal heat source in gravitational field
Kh. Lotfy,Ramdan. S. Tantawi +1 more
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In this paper, a novel model of semiconducting elastic material is studied during a process of photothermal excitation, and the dual phase lag (DPL) for the heat conduction equation is introduced in the context of the variable of the thermal conductivity.Abstract:
In this work, a novel model of semiconducting elastic material is studied during a process of photothermal excitation. The dual phase lag (DPL) for the heat conduction equation is introduced in the context of the variable of the thermal conductivity. The thermal conductivity can be chosen as a linear function of temperature (depend on temperature). The generalized thermoelasticy theory is investigated when an internal heat source is steady with a constant speed in the context of the gravitational field. The harmonic wave technique is used in two-dimensional deformations to obtain the considered physical fields. Some thermal loading subjected to thermal shock and other mechanical forces at the outer free surface of a semi-infinite elastic medium (semiconductor as silicon) are applied. The considered physical fields were illustrated graphically. The influences of some several variables are obtained which based on the DPL (thermal memories) model and the variable thermal conductivity. The results obtained are investigated and are depicted graphically.read more
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A Novel Magneto-Electron-Hole Model for Optical-Thermo-Diffusion Processes in Semiconducting Material with Variable Thermal Conductivity
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Photo-thermoelastic behavior of a functionally graded? Semiconductor medium excited by thermal laser pulses
TL;DR: In this article, the photothermal response of a functionally graded semiconducting thermoelastic half-space was studied using the generalized thermo-elastic heat conduction theory without energy dissipation.
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Thermodiffusion Waves of Mechanical Ramp Non-Local Excited Semiconductor Medium with Variable Thermal Conductivity
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Elastic-thermal-diffusion model with a mechanical ramp type and variable thermal conductivity of electrons–holes semiconductor interaction
Kh. Lotfy,A. El-Bary +1 more
TL;DR: In this article , an elastic-thermodiffusion (ETD) model in the context of the coupled between the holes and electrons is constructed for the semiconductor material, and dimensionless field quantities are obtained analytically for the principle physical fields (hole charge field carrier, elastic, thermal, and electrons charge carrier density (plasma) waves).
References
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Applications of photoacoustic sensing techniques
TL;DR: In this article, the theory and applications of photo-acoustic (also called optoacoustic) methods belonging to the more general area of photothermal measurement techniques are reviewed, covering excitation of gaseous or condensed samples with modulated continuous light beams or pulsed light beams.
Book
Macro- to Microscale Heat Transfer: The Lagging Behavior
TL;DR: In this paper, a dual-phase-leg model is proposed to describe the heat transfer in solids with micro-structures, and experimental evidence supports the lagging behaviour in heat transport under various circumstances, including the high-order effect of phase legs in the delayed response.