Nonequilibrium energy transport taking place in the surface region of the metallic substrate due to laser short-pulse heating results in entropy production in electron and lattice systems. The entropy analysis gives insight into the irreversible processes taking place in this region during the laser short-pulse heating process. In the present study, entropy production during laser shortpulse heating of copper is considered. Equations governing the nonequilibrium energy transport are derived using an electron kinetic theory approach. The entropy equations due to electron and lattice systems and coupling of these systems are formulated. The governing equations of energy transport and entropy production are solved numerically. Two pulse shapes, namely step input intensity and exponential intensity, are employed in the analysis. It is found that entropy production due to coupling process attains higher values than those produced due to electron and lattice systems. The effect of pulse shape on the entropy production inside the substrate material is significant.
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September 2002
Technical Papers
Entropy Production During Laser Picosecond Heating of Copper
Bekir Sami Yilbas
Bekir Sami Yilbas
King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
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Bekir Sami Yilbas
King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
Contributed by the Advanced Energy Systems Division for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received by the AES Division, March 24, 2001; revised manuscript received April 5, 2002. Associate Editor: S. Garimella.
J. Energy Resour. Technol. Sep 2002, 124(3): 204-213 (10 pages)
Published Online: August 6, 2002
Article history
Received:
March 24, 2001
Revised:
April 5, 2002
Online:
August 6, 2002
Citation
Yilbas, B. S. (August 6, 2002). "Entropy Production During Laser Picosecond Heating of Copper ." ASME. J. Energy Resour. Technol. September 2002; 124(3): 204–213. https://doi.org/10.1115/1.1488173
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