Computational Simulations of Dynamic Compaction of Dry Sand

2012 ◽  
Vol 598 ◽  
pp. 516-519
Author(s):  
Yu Qing Ding ◽  
Wen Hui Tang ◽  
Xian Wen Ran ◽  
Xin Xu
Keyword(s):  
Computational Analysis ◽  
Dynamic Compaction ◽  
Back Surface ◽  
Computational Results ◽  
Two Dimensional ◽  
Computational Simulations ◽  
Plate Impact ◽  
Arrival Times ◽  
Dry Sand ◽  
Impact Experiments

The computational analysis of plate impact experiments on dry sand utilizing the Mie- Grüneisen (MG) equation of state and the P-α compaction model were investigated in this study. A number of two dimensional axial symmetric computations were performed by using the hydrocode AUTODYN. The computational results were compared with the particle velocity on the back surface of the rear plate measured by the VISAR system and the first shock-wave arrival times detected by piezoelectric pins in the samples respectively. It was found that the P-α compaction model was more accurately reproduce the experimental data than the MG EOS.

Numerical Simulation of Flows in a Pipe with an Aneurismal Sac (Effects of Aneurismal Models and Stents)

2008 ◽  
Vol 33-37 ◽  
pp. 1025-1030
Author(s):  
Gulbahar Wahap ◽  
Tatsuya Kobori ◽  
Yoko Takakura ◽  
Norio Arai ◽  
Yoshifumi Konishi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Human Blood ◽  
Steady States ◽  
Computational Results ◽  
Two Dimensional ◽  
Blood Flows ◽  
Inflow Condition ◽  
Inflow Conditions ◽  
Two Dimensional Flows

Recently, the intravascular therapy using microcoils and stents to treat aneurysms has attracted researcher’s interest. In this study, in order to evaluate the effects of the stents, a numerical simulation of two-dimensional flows has been carried out for a pipe with a model of an aneurismal sac. Using aneurismal models with different inclined angles to the pipe, inflow conditions with steady states or pulsations have been applied in the range of Reynolds number in human blood flows. First, the computational results are compared with experiments under the steady inflow condition, which has shown the reliability of the numerical simulation. Furthermore, the mechanism of flows with an aneurismal model is discussed in the case with or without a stent, and consequently the effect of the stent is clarified.

scholarly journals Computational analysis of two-dimensional wing aeroelastic flutter using Navier-Stokes model

2018 ◽  
Vol 9 (4) ◽  
pp. 3459-3472 ◽  
Author(s):  
Magdy Saeed Hussin ◽  
Ashraf Ghorab ◽  
Mohamed A. El-Samanoudy
Keyword(s):  
Computational Analysis ◽  
Navier Stokes ◽  
Two Dimensional ◽  
Aeroelastic Flutter

scholarly journals Crystal Structure and Computational Analysis of a Two-Dimensional Coordination Polymer, BiI3(DppeO2)3/2

2018 ◽  
Vol 28 (2) ◽  
pp. 528-534 ◽  
Author(s):  
Andrew W. Kelly ◽  
Amelia M. Wheaton ◽  
Aaron D. Nicholas ◽  
Howard H. Patterson ◽  
Robert D. Pike
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Computational Analysis ◽  
Two Dimensional

Damage Characteristics of Dynamically Induced Incipient Spall in Ultrapure Aluminum

2018 ◽  
Vol 910 ◽  
pp. 130-136
Author(s):  
Hui Peng ◽  
Xiao Yang Pei ◽  
Ji Dong Yu ◽  
Mei Lan Qi ◽  
Jing Song Bai ◽  
...  
Keyword(s):  
Cross Section ◽  
Surface Profile ◽  
Chromatic Aberration ◽  
Profile Measurement ◽  
Plate Impact ◽  
Damage Characteristics ◽  
3D Surface Topography ◽  
Impact Experiments ◽  
Surface Profile Measurement ◽  
Ductile Fracture Process

A series of plate-impact experiments were performed to study the damage characteristics of incipient spall in ultrapure aluminum (99.999%). Surface profile measurement system based on the axial chromatic aberration was used to measure the cross section of “soft-recovered” samples and reconstruct the metallographic and 3D surface topography. Statistical analyses show that the size distribution, coalescence condition and connectivity factor of the voids are regularly affected by loading conditions. Based on this finding, the mechanisms that control the damage properties and evolution process of dynamic fracture are analyzed in detail. The results of this research offer an experimental quantitative microstructure description of the ductile fracture process.

Computational Simulations on the Binding and Reactivity of a Nitrile Inhibitor of SARS-CoV-2 Main Protease

2021 ◽  
Author(s):  
Carlos A. Ramos-Guzmán ◽  
José Javier Ruiz-Pernía ◽  
Iñaki Tuñón
Keyword(s):  
Free Energy ◽  
Computational Analysis ◽  
Binding Mode ◽  
Free Energy Calculations ◽  
The Novel ◽  
Computational Simulations ◽  
Main Protease ◽  
3Cl Protease ◽  
Alchemical Free Energy ◽  
Alchemical Free Energy Calculations

We present a detailed computational analysis of the binding mode and reactivity of the novel oral inhibitor PF-07321332 developed against SARS-CoV-2 3CL protease. Alchemical free energy calculations suggest that positions...

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