Experimental Micro/Nanoscale Thermal Transport by Xinwei Wang

By Xinwei Wang

This e-book covers the recent applied sciences on micro/nanoscale thermal characterization built within the Micro/Nanoscale Thermal technology Laboratory led through Dr. Xinwei Wang. 5 new non-contact and non-destructive applied sciences are brought: optical heating and electric sensing method, brief electro-thermal procedure, temporary photo-electro-thermal method, pulsed laser-assisted thermal rest strategy, and steady-state electro-Raman-thermal method. those thoughts function considerably more advantageous ease of implementation, great signal-to-noise ratio, and feature the skill of measuring the thermal conductivity/diffusivity of varied one-dimensional constructions from dielectric, semiconductive, to steel materials.Content:
Chapter 1 creation (pages 1–46):
Chapter 2 Thermal Characterization in Frequency area (pages 47–86):
Chapter three temporary applied sciences within the Time area (pages 87–140):
Chapter four Steady?State Thermal Characterization (pages 141–204):
Chapter five Steady?State Optical?Based Thermal Probing and Characterization (pages 205–246):

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M. P. Allen and D. J. Tildesley, Computer Simulation of Liquids. (Clarendon Press, Oxford, 1987). S. G. Volz and G. Chen, Physical Review B 61 (4), 2651 (2000). A. McGaughey and M. Kaviany, International Journal of Heat and Mass Transfer 47 (8–9), 1783–1798 (2004). A. McGaughey and M. Kaviany, International Journal of Heat and Mass Transfer 47 (8–9), 1799–1816 (2004). X. Huang, X. Huai, S. Liang and X. Wang, Journal of Physics D: Applied Physics 42 (9), 095416 (2009). X. Wang and X. Xu, Journal of Heat Transfer 125 (6), 1147 (2003).

In this discussion, the relaxation tracking is conducted in a more determined way by selecting energy carriers starting from uniformly spaced points and having uniformly selected initial movement directions. 20a as an example, we discuss about how the energy carrier tracking is implemented here. The domain of interest is first divided into small divisions with size δV . The energy carriers starting from each division are allowed to move in a discretized direction (θ0 , φ0 ). A time step δt is used in the tracking, which is much smaller than the thermal relaxation time (τ = l/v) of energy carriers in bulk materials.

The first step is collision, which occurs when phonons collide with each other and possibly change their distribution according to the scattering rule designated by (e0 − e)/τ . The second step is streaming, where phonons move to the nearest node in the direction of their velocity. 23. 25. This evolution is repeated stepwise until a specified criterion is achieved. It is evident that the LBM can be used for solving both transient and steady-state problems. As mentioned earlier, phonons will approach thermal equilibrium immediately after reaching the upper or lower boundaries because the local temperatures are fixed.

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