Addressing the problem of non-steady state liquid flow in wood

✍ Scribed by W. B. Banks

• Publisher: Springer
• Year: 1981
• Tongue: English
• Weight: 288 KB
• Volume: 15
• Category: Article
• ISSN: 0043-7719
• DOI: 10.1007/bf00353469

✦ Synopsis

Problems associated with handling non-steady liquid flow data are discussed. It is shown that the Darcian flow model is fundamentally imprecise when applied to non-steady state flow in wood due to: -1) the observed decrease in permeability with increased specimen length 2) the wide range of diameters encountered in wood pores. Because of this wide range of pore sizes, liquid penetrates some flow paths more rapidly than others. This may give rise to the occurrence of surface forces resisting penetration, with both "wetting" and "non-wetting" liquids.

It seems unlikely that these various factors can be accurately quantified. Hence the precise prediction of liquid penetration rate from steady state permeability data may be illusory.