Natural convection from a buried pipe with a layer of backfill is numerically examined in this study. The objective of the present study is to investigate how a change in the permeability of the backfill would affect the flow patterns and heat transfer results. Numerical calculations have covered a wide range of the governing parameters (i.e., 10 ≤ Ra1 ≤ 500 and 0.1 ≤ K1/K2 ≤ 10) for various backfill thicknesses (0.5 ≤ t/ri ≤ 2). The results suggest that a more permeable backfill can minimize the heat loss and confine the flow to a region close to the pipe.
Natural Convection From a Pipe Buried in a Porous Medium With Variable Permeability
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Ngo, CC, & Lai, FC. "Natural Convection From a Pipe Buried in a Porous Medium With Variable Permeability." Proceedings of the ASME 2003 International Mechanical Engineering Congress and Exposition. Heat Transfer, Volume 1. Washington, DC, USA. November 15–21, 2003. pp. 349-355. ASME. https://doi.org/10.1115/IMECE2003-43164
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