Heat Exchange in Unsaturated Porous Media with Heat Dependent Water Flow

Autor: Kačur, Jozef, Mihala, Patrik
Zdroj: Diffusion and Defect Data Part A: Defect and Diffusion Forum; February 2019, Vol. 391 Issue: 1 p1-10, 10p
Abstrakt: We discuss the heat and mass transport in unsaturated-saturated porous mediaincluding heat exchange between in[removed info]ltrated water and matrix. We include the thermal in[removed info]uenceon hydraulic permeability and on the water expansion which changes the water saturation.This consequently in[removed info]uences the hydraulic permeability.Numerical modelling includes the direct and inverse solution of the problem, where model parametersare determined. Numerical experiments require only simple input/output measurementsof suitable [removed info]ow characteristics in laboratory conditions with 3D cylindrical samples.The [removed info]ow model is based on Richard's strongly non-linear parabolic equation based on empiricalvan Genuchten's capillary-pressure model. The transport includes longitudinal and transversaldispersion.
Databáze: Supplemental Index