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λ thermal conductivity ρ intrinsic averaged density ρ0 wood density σ surface tension σ(T) surface tension at temperature T σx stress σ* complex stress σ’ elastic stress σ” viscous stress τ relaxation time of collapse process W m-1 K-1 kg m-2 kg m-2 N m-1 N m-1 Pa Pa Pa Pa s Pa. s m3 m-3 m μ dynamic viscosity of air φ phase potential φ porosity χ depth scalar 𝜔 mass fraction Superscripts and subscripts 𝑎 air 𝑏 bound water c capillary calc calculated crit critical e enthalpy 𝑒𝑓𝑓 effective property f fibres 𝑓sp fibre saturation point g gas phase 𝑖,j structural direction of wood L longitudinal direction l liquid r relative R radial direction 𝑠 solid phase t top T tangential direction 𝑣 vapour phase 𝑣∞ vapour phase at boundary v vessels Evaluation of super–heated steam vacuum drying viability and development of a predictive drying model for Australian hardwood species – Final report 127PDF Image | Evaluation of super-heated steam vacuum drying
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