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You searched on: Author: nicos martys

Displaying records 31 to 40 of 83 records.
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31. Cement and Concrete Materials Research at the National Institute of Standards and Technology (NIST)
Published: 9/5/2007
Authors: Edward Joseph Garboczi, Dale P Bentz, Jeffrey W Bullard, Chiara F Ferraris, Nicos Martys, Max A Peltz, Sudalin Rodrigues, Paul E Stutzman, Kenneth Alan Snyder, John A. Winpigler
Abstract: The materials science of cement and concrete is the focus of the Inorganic Materials Group at the National Institute of Standards and Technology (NIST). These experimental and computational research efforts include component and finished materials ch ...

32. Computational Model Predictions of Suspension Rheology: Comparison to Experiment
Published: 7/25/2007
Authors: Nicos Martys, Chiara F Ferraris, V Gupta, Josephine H Cheung
Abstract: Predicting the rheological properties of fresh concrete, mortars, and cement paste from first principles remains a great challenge. While progress has been made in modeling the rheological properties of idealized hard sphere-like suspensions, there i ...

33. A Stokes Permeability Solver for Three-Dimensional Porous Media
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7416
Published: 4/4/2007
Authors: Dale P Bentz, Nicos Martys
Abstract: A set of C and Fortran computer programs have been developed for computing the permeability of three-dimensional porous media under incompressible Stokes flow conditions. In this NISTIR, the background for developing these codes is reviewed and the ...

34. Report of Phase One Measurement and Analysis of Building Water System Contamination and Decontamination
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7351
Published: 7/3/2006
Authors: Stephen J. Treado, Mark A Kedzierski, Stephanie S Watson, Dale P Bentz, Nicos Martys, Kenneth D Cole
Abstract: This report describes the results of the first phase of a research project to evaluate how contaminants accidentally or intentionally introduced into the water supply might accumulate in building plumbing systems, and how these contaminants might be ...

35. Virtual Testing of Cement and Concrete
Published: 5/10/2006
Authors: Dale P Bentz, Edward Joseph Garboczi, Jeffrey W Bullard, Chiara F Ferraris, Nicos Martys, Paul E Stutzman
Abstract: Concrete is a unique multi-phase, random, complex, and composite material that provides both strength and impermeability to engineered structures. Unlike most construction materials, the properties of concrete continue to develop over time and in pl ...

36. Study of a Dissipative Particle Dynamics Based Approach for Modeling Suspensions.
Published: 12/1/2005
Author: Nicos Martys

37. A BBGKY-based density gradient approximation of interparticle forces: Application for discrete Boltzman methods
Published: 10/26/2005
Author: Nicos Martys
Abstract: The force term accounting for intermolecular interactions, with application to discrete Boltzmann simulation methods, is derived directly using a density gradient expansion of the BBGKY collision operator. It is shown that previous calculations, bas ...

38. Cross-Property Correlations and Permeability Estimation in Sandstone
Published: 10/26/2005
Authors: C H Arns, M A Knackstedt, Nicos Martys
Abstract: Results from a numerical study examining the cross-property correlations linking fluid permeability to conductive properties and to a number of pore size parameters based on 3D digitized images of sedimentary rock are presented. In particular we foc ...

39. Study of a Dissipative Particle Dynamics Based Approach for Modeling Suspensions
Published: 4/1/2005
Author: Nicos Martys
Abstract: In this paper, a dissipative particle dynamics (DPD)-based approach for modeling suspensions is examined. A series of tests are applied comparing simulation results to well established theoretical predictions. The model recovers the dilute limit in ...

40. Breakup of a Fluid Thread in a Confined Geometry: Droplet-Plug Transition Perturbation Sensitivity and Kinetic Stabilization With Confinement .
Published: 12/1/2004
Authors: J G Hagedorn, Nicos Martys, J F Douglas

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