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Controlling and Optimizing Entropy Production in Transient Heat Transfer in Graded Materials
James Pérez-Barrera1, Aldo Figueroa2, Federico Vázquez3
1Centro de Investigación en Ciencias (CInC), Universidad Autónoma del Estado de Morelos (UAEM), Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Mexico.
Entropy (Basel, Switzerland)
|December 3, 2020
Summary
This study analyzes heat transfer in functionally graded materials. Researchers found that material grading can optimize thermal performance and reduce stress by controlling temperature gradients.
Area of Science:
- Materials Science
- Thermodynamics
- Numerical Analysis
Background:
- Functionally graded materials (FGMs) offer tailored thermal properties.
- Understanding transient heat transfer is crucial for FGM applications.
- Thermal stresses can limit the performance of FGMs.
Purpose of the Study:
- To numerically analyze transient heat transfer in FGMs under a fixed temperature difference.
- To assess the thermal performance of FGMs by varying their gradation.
- To investigate the relationship between material grading, entropy production, and thermal stresses.
Main Methods:
- Numerical analysis of transient heat transfer.
- Evaluation of temperature profiles and entropy production.
- Variation of material gradation profiles.
Main Results:
- Entropy production exhibits non-monotonic behavior with varying material gradation.
- Identification of maximum and minimum entropy production values based on gradation.
- Transient analysis reveals opportunities for optimizing FGM thermal performance.
Conclusions:
- Material gradation can be optimized to reduce thermal stresses in FGMs.
- Identifying regions with large temperature gradients allows for targeted thermal conductivity profile design.
- This approach provides a criterion for optimizing FGMs for improved thermal management.
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