Numerical Modelling and Laboratory Experiments of Tritium Transport in Unsaturated Soil

2002 ◽  
Vol 41 (3P2) ◽  
pp. 464-469 ◽  
Author(s):  
Jun Koarashi ◽  
Takao Iida ◽  
Mariko Atarashi-Andoh ◽  
Hiromi Yamazawa ◽  
Hikaru Amano
Keyword(s):  
Numerical Modelling ◽  
Unsaturated Soil ◽  
Laboratory Experiments ◽  
Tritium Transport

A column study of static nonequilibrium fluid pressures in sand during prolonged drainage

1994 ◽  
Vol 31 (2) ◽  
pp. 299-303 ◽  
Author(s):  
S. Lee Barbour ◽  
Ernest K. Yanful
Keyword(s):  
Hydraulic Conductivity ◽  
Numerical Modelling ◽  
Unsaturated Soil ◽  
Fluid Pressure ◽  
Coarse Sand ◽  
Residual Water ◽  
Residual Saturation ◽  
Sand Column ◽  
Soil Systems ◽  
Theoretical Analyses

In the design of layered soil systems, such as the design of liners or covers over unsaturated soil, a key design concern is the magnitude of negative fluid pressure that will develop along the base of the liner or cover. In the absence of evaporation or vapour migration, the maximum negative fluid pressures will develop near the cessation of drainage. Previous theoretical analyses and numerical modelling of these systems have indicated that this pressure will be the pressure at which an underlying sand reaches its residual water content. The hydraulic conductivity of the sand at these pressures is so small that "static" nonequilibrium pressures are sustained over long periods of time. In this note, laboratory verification is provided for the magnitude of these pressures based on drainage of a fine and coarse sand column. Key words : covers, liners, air-entry value, residual saturation, layering, drainage.

scholarly journals ENHANCED FIELD OBSERVATION BASED PHYSICAL AND NUMERICAL MODELLING OF TSUNAMI INDUCED BOULDER TRANSPORT PHASE 1: PHYSICAL EXPERIMENTS

2017 ◽  
pp. 4 ◽  
Author(s):  
Jan Oetjen ◽  
Max Engel ◽  
Helmut Brückner ◽  
Shiva P. Pudasaini ◽  
Holger Schüttrumpf
Keyword(s):  
Numerical Modelling ◽  
Laboratory Experiments ◽  
Transport Model ◽  
Phase 1 ◽  
Storm Surges ◽  
High Energy ◽  
Real World Data ◽  
Two Phase ◽  
Physical Experiments ◽  
Physical Laboratory

Coasts around the world are affected by high-energy wave events like storm surges or tsunamis. By focusing on tsunami impacts, we investigate tsunami-induced transport of boulders by an interdisciplinary combination of field observations, laboratory experiments and advanced numerical modelling. In phase 1 of the project we conduct physical laboratory experiments based on real-world data. Following the experimental phase we will develop an enhanced numerical boulder transport model (BTM) based on an existing two-phase model.

Heat tracer test in a riparian zone: Laboratory experiments and numerical modelling

2018 ◽  
Vol 563 ◽  
pp. 560-575 ◽  
Author(s):  
Jie Ren ◽  
Xiuping Wang ◽  
Zhenzhong Shen ◽  
Jian Zhao ◽  
Jie Yang ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Laboratory Experiments ◽  
Riparian Zone ◽  
Tracer Test

Numerical Modelling and Laboratory Testing of Selected Bolt Connections of Steel Structures

2020 ◽  
Vol 832 ◽  
pp. 41-50
Author(s):  
Anežka Jurčíková ◽  
Miroslav Rosmanit
Keyword(s):  
Numerical Modelling ◽  
Laboratory Testing ◽  
Laboratory Experiments ◽  
Large Deformations ◽  
Numerical Models ◽  
Steel Structures ◽  
Plastic Behavior ◽  
Deformation Curves ◽  
Basic Behavior ◽  
Subsequent Comparison

Subject of this paper is numerical modelling of steel assembling bolt connections of CHS (circular hollow sections) or L-profiles respectively in the FEM software ANSYS 12.0 and their subsequent comparison with performed laboratory experiments. Non-linear calculations with both plastic behavior of materials and influence of large deformations were taken into account. Comparison of results, in the form of load-deformation curves, showed that numerical models describe the basic behavior of those joints. The direct numerical model outputs were modified. This modification was made with respect to real laboratory conditions taking into account the effect of the trial press machine slip stiffness and the initial slip.

Unsteady Flow and Saline Intrusion in Long Sea Outfalls

1992 ◽  
Vol 25 (9) ◽  
pp. 225-234 ◽  
Author(s):  
T. Larsen ◽  
R. Burrows ◽  
L. Engedahl
Keyword(s):  
Numerical Modelling ◽  
Unsteady Flow ◽  
Laboratory Experiments ◽  
Numerical Models ◽  
Saline Intrusion ◽  
Pump Operation ◽  
Operation Results ◽  
The University ◽  
Wave Induced ◽  
Sea Outfalls

The internal hydraulics of the multiport diffuser section in long sea outfalls has been studied by laboratory experiments and numerical modelling. The study has run for five years as a coordinated effort at both the University of Liverpool and the University of Aalborg. The investigations have covered such phenomena as saline intrusion, wave influence and unsteady flow caused by pump operation. Results show that numerous flow regimes exist depending on the boundary conditions. Numerical models have been developed to simulate the flow field in the diffuser section and some of the most interesting phenomena, in particular the wave induced saline intrusion, can now be modelled satisfactorily. Some aspects of the behaviour relating to very low fresh water discharges, e.g. unsteady flow when saline wedges are present, are still not very well described.

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