Simulation of hysteresis in soil-water retention with a correlation between the invading pressure to the governing effective flow area

Download

index.pdf

Date

2020-03-23

Author

Sattari, Amir Shoarian
Siebelist, Marlena
Toker, Nabi Kartal
Wuttke, Frank

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

180
views

102
downloads

In order to determine the soil-water retention (SWR) behavior of a particulate medium, the invading phase pressure in the inter-particle level is correlated to the governing effective pore area in the wetting and drying paths. In a three-phase medium that consists of air, wetting fluid and solids, the invading phase on the drying path is air, whereas on the wetting path the wetting fluid advances into the cavities. On a drying path where the area of a cavity is minimum, the air-entry pressure (AEP) of a pore throat is determined by numerically solving the Young-Laplace curvature equation. This can be done using the finite difference method and Newton-Raphson (Jacobian) approximation technique. Next, a relation between the pore area and the value of AEP is developed by varying the distance between solids around the pore throat. Similarly, the water-entry pressure (WEP) is correlated to a maximum pore area of cavity. After packing the particulate domain with the given particle size distribution (PSD) and void ratio values, the primary/main drying and wetting paths of the wetting fluid are simulated and the effect of hysteresis in SWR is shown. It is considered that the total suction equals to matric suction value and the water bridges between two adjacent particles are formed in the form of pendular rings. In this study, the considered material is non-plastic and the shrinkage and swelling during the drying and wetting phases or any change in pore structure are neglected. The simulation results are compared to experimentally determined as well as estimated data from the literature and a great agreement between the results is found, which offers a reliable way around conducting tedious and expensive SWR tests.

Subject Keywords

General Physics and Astronomy, General Materials Science, Mechanics of Materials

URI

https://hdl.handle.net/11511/37706

Journal

GRANULAR MATTER

DOI

https://doi.org/10.1007/s10035-020-1010-7

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Analyzing Fe-Zn system using molecular dynamics, evolutionary neural nets and multi-objective genetic algorithms Bhattacharya, Baidurya; Kumar, G. R. Dinesh; Agarwal, Akash; Erkoç, Şakir; Singh, Arunima; Chakraborti, Nirupam (Elsevier BV, 2009-10-01) Failure behavior of Zn coated Fe is simulated through molecular dynamics (MD) and the energy absorbed at the onset of failure along with the corresponding strain of the Zn lattice are computed for different levels of applied shear rate. temperature and thickness. Data-driven models are constructed by feeding the MD results to an evolutionary neural network. The outputs of these neural networks are utilized to carry out a multi-objective optimization through genetic algorithms, where the best possible tradeo...
Calculation of the Raman frequencies of lattice modes in the disordered phase II of NH4Br at high pressures Yurtseven, Hasan Hamit (Physics Essays Publication, 2010-01-01) The Raman frequencies are calculated here at various temperatures for the nu(7) (56 cm(-1)) and nu(5) (134 cm(-1)) lattice modes in the disordered phase II of NH4Br. The lattice parameter data obtained at zero pressure are used to calculate the Raman frequencies of those modes studied for constant pressures of 0.1, 108, and 637.5 MPa in phase II of the NH4Br crystal. Through the mode Gruumlneisen parameter which is kept constant in the disordered phase II, the Raman frequencies calculated decrease linearly ...
Prediction of forming limit curve at fracture for sheet metal using new ductile fracture criterion Dizaji, Shahram Abbasnejad; Darendeliler, Haluk; KAFTANOĞLU, BİLGİN (Elsevier BV, 2018-05-01) The application of ductile fracture criteria (DFCs) in numerical analysis of sheet metal forming processes can lead to the accurate determination of the fracture initiation. In this study, a new uncoupled ductile fracture criterion (DFC) has been developed which considers the effects of material parameters on the forming limit curves (FLCs) and can be easily implemented in the finite element codes. Two different constitutive models have been employed with the new DFC in order to evaluate the results obtaine...
Analysis and calculation of the magnetization, magnetic susceptibility and the specific heat close to phase transitions in heterometallics Dugan, E. Kilit; Yurtseven, Hasan Hamit (Elsevier BV, 2019-10-01) The temperature dependence of the magnetization for DMFeNi and DMFeCu is calculated by the molecular field theory and it is also analyzed as functions of temperature and the magnetic field by the power-law formulae close to the phase transitions in these compounds by using the observed data from the literature. From the analysis, values of the critical exponents beta (temperature-induced order parameter at H = 100 Oe) and delta (field-induced order parameter at T = 2 K) are deduced. Also, using the observed...
Investigation of as-quenched and tempered commercial steels by Magnetic Barkhausen Noise method Gür, Cemil Hakan; Çam, İbrahim (Inderscience Publishers, 2006-01-01) This study aims to characterise as-quenched and tempered steels by the Magnetic Barkhausen Noise method, and to contribute to optimisation of heat treatment processes. Identical austenitisation and quenching procedures were applied to SAE 1040 and SAE 4140 specimens to eliminate the effect of grain size. Samples were tempered at 200°C and 600°C for 2 hours. Microstructures were characterised by metallographic examinations and hardness measurements. Amplitude, position and frequency spectrum of signals were ...

Citation Formats

A. S. Sattari, M. Siebelist, N. K. Toker, and F. Wuttke, “Simulation of hysteresis in soil-water retention with a correlation between the invading pressure to the governing effective flow area,” GRANULAR MATTER, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37706.