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Sharp dual estimates for conductance of an optimal circular cooling fin

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Abstract

A cooling fin attached to a cylinder of circular cross section is considered. We obtain sharp upper and lower estimates for the maximum heat dissipation under the constraint that the total weight of the fin should not exceed a given bound. It is assumed that the boundary of the cylinder has a constant temperature and that Newton's law of cooling holds.

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References

  1. Duffin, R. J.,A Variational Problem Relating to Cooling Fins, Journal of Mathematics and Mechanics, Vol. 8, pp. 47–56, 1959.

    Google Scholar 

  2. Duffin, R. J., andMcLain, D. K.,Optimum Shape of a Cooling Fin on a Convex Cylinder, Journal of Mathematics and Mechanics, Vol. 17, pp. 769–784, 1968.

    Google Scholar 

  3. Bhargava, S., andDuffin, R. J.,Dual Extremum Principles Relating to Cooling Fins, Quarterly of Applied Mathematics, Vol. 31, pp. 27–41, 1973.

    Google Scholar 

  4. Liu, C. Y.,A Variational Problem Relating to Cooling Fins with Heat Generation, Quarterly of Applied Mathematics, Vol. 19, pp. 245–251, 1962.

    Google Scholar 

  5. Liu, C. Y.,A Variational Problem with Applications to Cooling Fins, SIAM Journal on Applied Mathematics, Vol. 10, pp. 19–29, 1962.

    Google Scholar 

  6. Schmidt, E., Die Wärmeübertragung durch Rippen, Zeitschrift des Vereines Deutscher Ingenieure, Vol. 70, pp. 885–890, 1926.

    Google Scholar 

  7. Wilkins, J. E., Jr.,Minimum Mass Thin Fins and Constant Temperature Gradients, SIAM Journal on Applied Mathematics, Vol. 10, pp. 62–73, 1962.

    Google Scholar 

  8. Wilkins, J. E., Jr.,Minimum Mass Thin Fins for Space Radiators, Proceedings of Heat Transfer and Fluid Mechanics Institute, Stanford University Press, Stanford, California, 1960.

    Google Scholar 

  9. Duffin, R. J.,Duality Inequality in Mathematics and Science, Non-Linear Programming, Edited by J. B. Rosenet al., Academic Press, New York, New York, 1970.

    Google Scholar 

  10. Bhargava, S., andDuffin, R. J.,Dual Extremum Principles Relating to Optimum Beam Designs, Archive for Rational Mechanics and Analysis, Vol. 50, pp. 314–330, 1974.

    Google Scholar 

  11. Akhiezer, N. I.,The Calculus of Variations, Blaisdell Publishing Company, New York, New York, 1962.

    Google Scholar 

Additional Bibliography

  1. Appl, F. C., andHung, H. M.,A Principle for Convergent Upper and Lower Bounds, International Journal of Mechanical Sciences, Vol. 6, pp. 381–389, 1964.

    Google Scholar 

  2. Bhargava, S., andDuffin, R. J.,Network Models for Maximization of Heat Transfer Under Weight Constraints, Networks, Vol. 2, pp. 285–299, 1972.

    Google Scholar 

  3. Bhargava, S., andDuffin, R. J.,On the Non-Linear Method of Wilkins for Cooling Fin Optimization, SIAM Journal on Applied Mathematics, Vol. 24, pp. 441–448, 1973.

    Google Scholar 

  4. Focke, R., Die Nadel Als Kühlelement, Forschung auf dem Gebiete des Ingenieurwesens, Vol. 13, pp. 34–42, 1942.

    Google Scholar 

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Communicated by R. Conti

This research was supported by the International Atomic Energy Agency and the United Nations Educational, Scientific, and Cultural Organization, International Center for Theoretical Physics, Miramare, Trieste, Italy.

The author wishes to thank Professor Abdus Salam, the International Atomic Energy Agency, and UNESCO for hospitality at the International Center for Theoretical Physics, Trieste, Italy. Thanks are also due to the University Grants Commission, New Delhi, India, for a travel Grant, and the University of Mysore, Mysore, India, for granting the necessary leave.

On leave of absence from the University of Mysore, Mysore, India.

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Bhargava, S. Sharp dual estimates for conductance of an optimal circular cooling fin. J Optim Theory Appl 19, 565–575 (1976). https://doi.org/10.1007/BF00934655

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