The effect of the shear-rate dependent thermal conductivity of non-Newtonian fluids on the heat transfer enhancement

- Journal title : Transactions of the Korean Society of Mechanical Engineers B
- Volume 20, Issue 5, 1996, pp.1717-1724
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.22634/KSME-B.1996.20.5.1717

Title & Authors

The effect of the shear-rate dependent thermal conductivity of non-Newtonian fluids on the heat transfer enhancement

Sin, Se-Hyeon; Lee, Seong-Hyeok; Son, Chang-hyeon;

Sin, Se-Hyeon; Lee, Seong-Hyeok; Son, Chang-hyeon;

Abstract

The present study investigates the effect of the shear rate-dependent thermal conductivity of non-Newtonian fluids on the heat transfer enhancement in a pipe flow. An axially-constant heat flux boundary condition was adopted in the thermal fully developed region. The present analytical results of Nusselt numbers for various non-Newtonian fluids show heat transfer enhancement over those of a shear rate-independent thermal conductivity fluids. The present analytical results showed good agreement with the previous experiments which excluded the temperature-dependent viscosity effect on heat transfer. This study also proposes the use of a shear rate-dependent thermal conductivity fluids in the design of a heat exchanger for heat transfer enhancement as well as reduction of fouling.

Keywords

Shear Rate-Dependnce;Thermal Conductivity;Non-Newtonian Fluid;Heat Transfer Enhancement;

Language

Korean

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