Model Fitting for Determining the Parameter of the Pore Size Distribution

Imre, Emőke; Mwinken, Delphin Kabey; Barreto, Daniel

Abstract

The computation of the SWCC requires prior estimation of the pore-size distribution (POSD) which is computed from the PSD. The process described in detail by [1-3]. It needs a value of a which is a model parameter related to particle shape and orientation. On the basis of previous empirical data, the work by [4-6] suggests 1.3≤α≤1.5, while [1, 2] used 1.35≤α≤1.39 for a smaller number of soil types. In this work our SWCC data measured on fractal sand mixtures were used. The Van Genuchten model was fitted then inverted [7-8], to have suction for a given water content. Then Least Squares fitting was made for the alpha, which had a smaller value around 1. The difference was tentatively explained by the fact that the measured data also deviated from the general measured SWCC-s, were shifted on the suction axis.

• Presentation Conference Type: Conference Paper (Published)
• Conference Name: 9th International Scientific Conference on Advances in Mechanical Engineering (ISCAME 2023)
• Start Date: Nov 9, 2023
• End Date: Nov 10, 2023
• Acceptance Date: Aug 15, 2023
• Online Publication Date: Nov 21, 2023
• Publication Date: 2023
• Deposit Date: Apr 20, 2024
• Publisher: Trans Tech Publications
• Pages: 43
• Book Title: Book of Abstracts from 9th International Scientific Conference on Advances in Mechanical Engineering
• Public URL: http://researchrepository.napier.ac.uk/Output/3597257
• Related Public URLs: https://konferencia.unideb.hu/en/iscame-official-program