Effects of cement particle distribution on the hydration process of cement paste in three-dimensional computer simulation

AbstractPortland cement-based materials are usually composites, where the matrix consists of portland cement paste. Cement paste is a material formed from the hydration reaction of portland cement, usually a calcium silicate material, with water. The microstructure of cement paste changes drastically over a time period of about one week, with slower changes occurring over subsequent weeks to months. The effect of this hydration process on the changing microstructure can be represented using computer simulation techniques applied to three dimensional digital image-based models. Percolation theory can be used to understand the evolving microstructure in terms of the three percolation thresholds that are of importance in the cement paste microstructure: the set point, capillary porosity percolation, and the percolation of the C-S-H phase.

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Three-dimensional predator–prey interactions: a computer simulation of bird flocks and aircraft

Canadian Journal of Zoology ◽

10.1139/z86-381 ◽

1986 ◽

Vol 64 (11) ◽

pp. 2624-2633 ◽

Cited By ~ 1

Author(s):

Peter F. Major ◽

Lawrence M. Dill ◽

David M. Eaves

Keyword(s):

Computer Simulation ◽

Prey Species ◽

Three Dimensional ◽

Aircraft Engine ◽

Aquatic Environments ◽

Aircraft Engines ◽

Predator Prey ◽

Simulation Techniques ◽

Computer Simulation Techniques ◽

Individual Prey

Three-dimensional interactions between grouped aerial predators (frontal discs of aircraft engines), either linearly arrayed or clustered, and flocks of small birds were studied using interactive computer simulation techniques. Each predator modelled was orders of magnitude larger than an individual prey, but the prey flock was larger than each predator. Expected numbers of individual prey captured from flocks were determined for various predator speeds and trajectories, flock–predator initial distances and angles, and flock sizes, shapes, densities, trajectories, and speeds. Generally, larger predators and clustered predators caught more prey. The simulation techniques employed in this study may also prove useful in studies of predator–prey interactions between schools or swarms of small aquatic prey species and their much larger vertebrate predators, such as mysticete cetaceans.The study also provides a method to study problems associated with turbine aircraft engine damage caused by the ingestion of small flocking birds, as well as net sampling of organisms in open aquatic environments.

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Three-dimensional corrective osteotomy using a patient-specific osteotomy guide and bone plate based on a computer simulation system: accuracy analysis in a cadaver study

International Journal of Medical Robotics and Computer Assisted Surgery ◽

10.1002/rcs.1530 ◽

2013 ◽

Vol 10 (2) ◽

pp. 196-202 ◽

Cited By ~ 27

Author(s):

Shinsuke Omori ◽

Tsuyoshi Murase ◽

Toshiyuki Kataoka ◽

Yohei Kawanishi ◽

Keiichiro Oura ◽

...

Keyword(s):

Computer Simulation ◽

Corrective Osteotomy ◽

Three Dimensional ◽

Cadaver Study ◽

Simulation System ◽

Bone Plate ◽

Patient Specific ◽

Accuracy Analysis

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Three-dimensional computer simulation of plasma cloud evolution in the ionosphere

Planetary and Space Science ◽

10.1016/0032-0633(90)90113-5 ◽

1990 ◽

Vol 38 (11) ◽

pp. 1375-1386 ◽

Cited By ~ 7

Author(s):

V.A. Rozhansky ◽

I.Yu. Veselova ◽

S.P. Voskoboynikov

Keyword(s):

Computer Simulation ◽

Three Dimensional ◽

Plasma Cloud ◽

Cloud Evolution

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Research in Automobile Dynamics - A Computer Simulation of General Three-Dimensional Motions

10.4271/710361 ◽

1971 ◽

Cited By ~ 11

Author(s):

Raymond R. Mchenry

Keyword(s):

Computer Simulation ◽

Three Dimensional

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Acoustical Design Study on Application of Absorption Materials

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.711.546 ◽

2014 ◽

Vol 711 ◽

pp. 546-549

Author(s):

Wei Lin ◽

Wei Hwa Chiang

Keyword(s):

Computer Simulation ◽

Energy Distribution ◽

Ray Tracing ◽

Impulse Response ◽

Background Noise ◽

Three Dimensional ◽

Design Phase ◽

Design Study ◽

Sound Energy ◽

Reinforcement System

Taipei Top Church Auditorium is a hall primarily intended for praise and worship. A three dimensional ray tracing computer simulation was used to provide sound energy distribution on the audience area of the hall, realistic design have been performed. The volume of the hall is 24600m3, which is occupied for 2200 people and equipped the hall with acoustical curtains by modifying its acoustical characteristics. Objective measurements of impulse response are reported, and background noise control and noise isolation are also be considered in the design phase. Reinforcement system is conducted to meet all the activity for the acoustical environments.

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