Effective thermal diffusivity of porous media in the wall vicinity

Hitoshi Sakamoto, Francis A. Kulacki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Transient conduction on a vertical, constant heat flux surface in a saturated porous medium is studied experimentally and analytically with a focus on determining near-wall thermal diffusivity. For combinations of different particulate solid and interstitial fluid, which give a range of conductivity ratios, ks/kf, from 0.5 to 2400, the present study finds that early-time transient temperature profiles can be analytically predicted using the thermal conductivity of the interstitial fluid because the near-wall porosity approaches 1.0. The conjugate heat transfer analysis accurately predicts the time the conductive front takes to travel through the impermeable wall. The present study also finds that conductive heat transfer along the wall is dependent on the wall thickness and must be taken into account when assessing measurement of local and overall Nusselt numbers. The present results raise the possibility of reinterpretation of much of the porous medium heat transfer experiments that make up the current database.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Heat Transfer Division 2005
Pages605-614
Number of pages10
Edition2
DOIs
StatePublished - Dec 1 2005
Event2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005 - Orlando, FL, United States
Duration: Nov 5 2005Nov 11 2005

Publication series

NameAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Number2
Volume376 HTD
ISSN (Print)0272-5673

Other

Other2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005
CountryUnited States
CityOrlando, FL
Period11/5/0511/11/05

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  • Cite this

    Sakamoto, H., & Kulacki, F. A. (2005). Effective thermal diffusivity of porous media in the wall vicinity. In Proceedings of the ASME Heat Transfer Division 2005 (2 ed., pp. 605-614). (American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD; Vol. 376 HTD, No. 2). https://doi.org/10.1115/IMECE2005-81623