Conjugate Heat Transfer in Two Partial Enclosures Connected by Refrigerator/Heater

Abstract:

Natural convection conjugated by two partial enclosures, connected by refrigerator/heater, has been numerically studied. Thick walls facing the opening are heated in one zone and cooled in the other zone respectively by constant heat fluxes. The isothermals, streamlines and heatlines are presented for varied governing parameters, Rayleigh numbers, Ra from 10³ to 10⁷, solid thick walls to fluid thermal conductivity ratio λ_S from 0.01 to 10.0, cavity aspect ratio, Ar from 1.0 to 8.0, and refrigeration coefficient, COR from 0.1 to 10.0. The streamlines and heatlines visualize the real fluid flow and heat transfer process or structures. Anti-clock streamlines are generated in both zones. Variations of extreme temperatures, T_max or T_min and dimensionless volumetric flow rate on the opening, M, along with these governing parameters are also presented in tables or figures. Correlations of extreme temperatures with Ra, λ_S and COR are given for varied Ar. At last, the unified correlations of with those parameters also are presented and analyzed. The results show that the common trends and characteristics of heat and fluid flow independent of Ar for both zones are summarized, though the convection is amplified with increased Ar.

• Periodical: Advanced Materials Research (Volumes 860-863)
• Pages: 1451-1457
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.860-863.1451
• Online since: December 2013
• Authors: Di Liu, Fu Yun Zhao*
• Keywords: Conjugate Heat Transfer, Natural Convection, Numerical Simulation, Partial Enclosures, Refrigeration/Heating

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