Thermal diffusion of water vapor through glass fiber insulation
Stephenson, D. G.
2003 Journal of Thermal Envelope and Building Science, vol. 27, no. 1, pp. 31-48(18)
Stephenson, D. G., (2003), "Thermal diffusion of water vapor through glass fiber insulation", Journal of Thermal Envelope and Building Science, vol. 27, no. 1, pp. 31-48(18).
Abstract:
The flux of water vapour through glass fiber insulation depends on the gradients of the concentration of the water vapour and the temperature in accordance with a generalized form of Fick's Law, viz.
JV/=-(1/ d/dx) - (1/T dT/dx)
The diffusion coefficient for the density gradient is related to the permeability obtained from an isothermal permeance test. The coefficient associated with the temperature gradient is derived from measured values of the heat flux through a specimen of fibrous insulation in both a wet and dry condition.