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Journal of Enhanced Heat Transfer

Publication de 8  numéros par an

ISSN Imprimer: 1065-5131

ISSN En ligne: 1563-5074

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Indexed in

Multiplicity Analysis of Pin Fins Under Multiboiling Conditions

Volume 10, Numéro 1, 2003, pp. 95-117
DOI: 10.1615/JEnhHeatTransf.v10.i1.80
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RÉSUMÉ

A numerical bifurcation analysis is carried out in order to determine the solution structure of pin fins subject to multiboiling heat transfer mode. The thermal analysis depends on the working fluid because the heat transfer coefficient is temperature dependent and includes the convective, the nucleate, the transition, and the film boiling regimes. The heat transfer process is modeled using one-dimensional heat conduction with or without heat transfer from the fin tip. Five fin profiles are considered: the cylindrical, the trapezoidal, the triangular, the convex parabolic, and the parabolic. The multiplicity structure is obtained in order to determine the different types of bifurcation diagrams, which describe the dependence of a state variable of the system (for instance, fin temperature or heat dissipation) on a design (conduction—convection parameter) or operation parameter (base temperature difference). Specifically, the effects of the base temperature difference, of the conduction-convection parameter, and of the Biot number are analyzed and presented in several diagrams and compared with experimental data available in the literature.

CITÉ PAR
  1. Razelos P., Das S., Krikkis R. N., Enhanced boiling heat transfer using radial fins, Heat and Mass Transfer, 44, 6, 2008. Crossref

  2. Goldstein R.J., Ibele W.E., Patankar S.V., Simon T.W., Kuehn T.H., Strykowski P.J., Tamma K.K., Heberlein J.V.R., Davidson J.H., Bischof J., Kulacki F.A., Kortshagen U., Garrick S., Srinivasan V., Heat transfer—A review of 2003 literature, International Journal of Heat and Mass Transfer, 49, 3-4, 2006. Crossref

  3. Krikkis Rizos N., On the multiple solutions of boiling fins with heat generation, International Journal of Heat and Mass Transfer, 80, 2015. Crossref

  4. Krikkis Rizos N., Laminar conjugate forced convection over a flat plate. Multiplicities and stability, International Journal of Thermal Sciences, 111, 2017. Crossref

  5. Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Pool Boiling Enhancement Techniques, in Two-Phase Heat Transfer Enhancement, 2020. Crossref

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