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Perrochet, Pierre

Nom
Perrochet, Pierre
Affiliation principale
Fonction
Professeur ordinaire
Email
pierre.perrochet@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/144

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  • Publication
    Accès libre
    Watertable dynamics under capillary fringes : experiments and modelling
    (2000-02-20)
    Nielsen, Peter
    ;
    Perrochet, Pierre 
    Watertable heights and total moisture content were measured in a sand column where the piezometric head at the base (“the driving head”) varied as a simple harmonic with periods in the range from 14.5 min to 6.5 h. The watertable height h(t) responded very closely to the driving head compared with the predictions of previous analytical and numerical models. The total moisture quantified as an equivalent, saturated height htot(t) varied very little compared with the watertable height. Neither h(t) nor htot(t) deviated significantly from simple harmonics when the driving head was simple harmonic. This indicates that non-linear effects are weak and hence that analysis based on linear solutions have fairly broad applicability. When h(t) and htot(t) are simple harmonic, the ratio nd=[dhtot/dt]/[dh/dt] is a constant in the complex formalism. Its magnitude