It is currently used at Idaho National Labs and other universities to do risk analysis for flooding related scenarios and for modeling nuclear reactor dynamics for heat exchange and boiling.
Pasimodo is a versatile academic and commercial numerical simulation platform for the simulation of granular materials, fluids, largely deformable solids, and other simulation tasks. As both a research code and commercial software, Pasimodo combines the advantages of accuracy, robustness, and simplicity for the user expected from a commercial program. With one-, two- or three-dimensional, serial or parallel simulations with static or dynamic resolution, it has been successfully applied in numerous academic and industrial projectsincluding sloshing fluids in tanks or solids in cutting processes.
It is a Multi-physics platform, capable of coupling the dynamics of soils, fluids and structures in 2D and 3D. It is suitable for simulating post-failure behaviour, large deformation, rheology of solid materials, and particularly soil-water interaction.
Its capable of simulating large variety of materials, including non-Newtonian fluids and snow. Additionally, PreonLab has in-situ postprocessing capability, including a ray tracer to which enables realistic rendering of results. PySPH allows users to write their high-level code in pure Python. This Python code is automatically converted to high-performance Cython or OpenCL which is compiled and executed. SPHERA has been validated on the following application fields: several types of floods with transport of solid bodies, bed-load transport, flood-control works, flood-induced damage; domain spatial coverage of some hundreds of squared kilometres and landslides, sloshing tanks, sea waves and sediment removal from water reservoirs.
It is also found that the flaw inclination has an effect on the formation and evolution of the shear zone. By affecting the distribution of micro-cracks, the flaw changes the macro shear zone of specimens. Abstract: Based on 2-D PFC, non-circular particle with direction was constructed and specimens with different distribution of long axis orientation were established. Loads were applied in vertical direction. Changes of fabric such as the long axis orientation, particle contact direction and particle contact force in the process of loading were analyzed.
It was shown that the larger angle of the loading direction and the long axis orientation, the greater strength of specimen and more anisotropic. Authors: Wei Song, Ren Hong. Abstract: In the present study, a coupled numerical method is used to study EDZ excavation damage zone in a deep schist tunnel.
The coupling is realized through an exchange of displacements, velocities, and forces in each cycling step. Simulation results are found to be in good agreement with in site ultrasonic wave measured EDZ profile. Authors: Wei Song. Abstract: Laboratory experiments and numerical simulations, using Particle Flow Code PFC2D , were performed to study the behavior of marble under tri-axial loading and pre-existing fissure uniaxial compression.
The laboratory tri-axial compression results of marble was analyzed, and the calibration of the micro-properties of BMP Bonded particle model in PFC2D with the test data was carried out successfully.
The pre-existing fissure was simulated by smooth joint contact, and the cracking propagation mode of pre-existing fissure was carried out with the calibrated BMP properties and single smooth joint contact.
The simulation show that the tensile crack firstly initiated along the vertical direction to pre-existing fissure, and then gradually departs towards the direction of axial stress, and finally develops along the direction of axial during compression.
The numerical simulation coincide with our understanding of fracture mechanics. Abstract: Numerical simulations of soil-pile interaction under surface loading are performed by particle flow code in two dimensions.
Considering an end-bearing pile subjected to flexible distribution load, the variety of negative skin friction is studied. Numerical results show that negative skin friction is variation with the increasing of surface loading, and the negative skin friction is decrease when the value is up to ultimate skin friction. Abstract: A 2-dimensional granular assembly, subjected to isotropic consolidation and biaxial compression, is simulated by applying discrete element method and the particle flow code of PFC2D.
The contact force network and distribution are examined and compared to an analogous photoelastic experiment carried out by other studies. The current study shows that the assembly undergoes dilatation and strain-softening after peak strength, and the coordination number average contact number of particles increases a little in the initial stage of strain hardening followed by a sharp dropping before the onset of softening.
This is correlated with the contact force chain establishment and the evolution of structural anisotropy. The distribution of the normal force and the ratio of tangential to normal force for both the isotropically compressed and sheared stages indicates that the strong normal contacts are crucial for the force chain transmitting stress through assembly.
The angular distribution of the contact forces supported this point and could help visualizing the induced anisotropy. These issues are vital for gaining a deeper understanding of the macroscopic behavior of granular material from microscopic analysis.
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