0.077800989151001126390FPLOTHERPublished to Web1Publication2Informally Refereed (Peer-Reviewed)53Miscellaneous Publication<![CDATA[Theoretical thermal conductivity equation for uniform density wood cells]]> 2008-1The anisotropy of wood creates a complex problem requiring that analyses be based on fundamental material properties and characteristics of the wood structure to solve heat transfer problems. A two-dimensional finite element model that evaluates the effective thermal conductivity of a wood cell over the full range of moisture contents and porosities was previously developed, but its dependence on software limits its use. A statistical curve-fit to finite-element results would provide a simplified expression of the modelâ€™s results without the need for software to interpolate values. This paper develops an explicit equation for the values from the finite-element thermal conductivity analysis. The equation is derived from a fundamental equivalent resistive-circuit model for general thermal conductivity problems. Constants were added to the equation to improve the regression-fit for the resistive model. The equation determines thermal conductivity values for the full range of densities and moisture contents. This new equation provides thermal conductivity values for uniform-density wood material using inputs of only oven-dry density and moisture content. An explicit method for determining thermal conductivity of uniform density wood cells has potential uses for many wood applications.https://www.fpl.fs.fed.us/documnts/pdf2008/fpl_2008_hunt001.pdf577 KBhttps://www.fs.usda.gov/treesearch/pubs/31172311720Wood and fiber science. Vol. 40, no. 2 (Apr. 2008): Pages 167-1800T0Hunt, John F.; Gu, Hongmei; Lebow, Patricia; 16-OCT-2008 16:34:4030-OCT-2013 14:03:49AY30-OCT-2013 13:42:43Hunt, John F.FPL4706jfhunt95011Gu, HongmeiFPL4851hongmeigu6057112Lebow, PatriciaFPL4851plebow153113Hunt, John F.FPL4706jfhunt95011Gu, HongmeiFPL4851hongmeigu6057112Lebow, PatriciaFPL4851plebow153113This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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