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A Note on Calculating Hysteretic Behavior
Author(s) -
Poulovassilis A.,
Kargas G.
Publication year - 2000
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj2000.6461947x
Subject(s) - hysteresis , boundary (topology) , wetting , function (biology) , domain (mathematical analysis) , mathematics , distribution (mathematics) , materials science , porosity , mathematical analysis , geometry , mechanics , physics , composite material , condensed matter physics , biology , evolutionary biology
A computational procedure for approximating the hysteretic relationship between pore water content and pressure head in porous bodies is described. A distribution function F is introduced that retains the features of the distribution function F of the independent domain model, but its values are obtained by partitioning the slopes of the wetting boundary curve of a reproducible hysteresis loop proportionately to the slopes of the drying boundary curve or vice versa. With the help of data provided by a primary drying scanning curve the procedure can be extended to approximate the hysteretic curves in the presence of nonindependent water elements. Calculated scanning curves were compared with experimental ones and satisfactory agreement between calculated and experimental scanning curves was observed.