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You searched on: Author: nicos martys

Displaying records 51 to 60 of 77 records.
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51. Fresh Concrete Rheology - Recent Developments
Published: 12/1/2001
Authors: Chiara F Ferraris, F De Larrard, Nicos Martys
Abstract: The design of concrete with specified properties for an application is not a new science, but it has taken on a new meaning with the wide use of high performance concretes. The following properties are related to fresh concrete: ease of placement and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860202

52. A Classical Kinetic Theory Approach to Lattice Boltzmann Simulation
Published: 10/1/2001
Author: Nicos Martys
Abstract: An approach to lattice Boltzmann simulation is described, which makes a direct connection between classical kinetic theory and contemporary lattice Boltzmann modeling methods. This approach can lead to greater accuracy, improved numerical stability ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860414

53. A New Approach to Lattice Boltzmann Simulation
Published: 10/1/2001
Author: Nicos Martys
Abstract: A new approach to lattice Boltzmann simulation is introduced which avoids the direct numerical determination of the single-particle distribution from the Boltzmann collision operator. Instead, one starts from the Chapman-Enskog expansion of the sing ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860240

54. De la Pate de Ciment au Beton: Modlisation et Mesures Exprimentales des Proprietes Rhologiques. [Cement Paste to the Concrete Modisation and Measure Experimental of the Properties Rheology.]
Published: 10/1/2001
Authors: Chiara F Ferraris, Nicos Martys
Abstract: The prediction of concrete rheological properties is essential for the correct use of the material. The composition of the concrete is nowadays complex. It is not limited to cement, aggregates and water but also includes admixtures and fillers. Ther ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860751

55. Improved Approximation of the Brinkman Equation using a Lattice Boltzmann Method
Published: 6/1/2001
Author: Nicos Martys
Abstract: In this brief communication, a new approach to generalize the lattice Boltzmann method to produce fluid flow consistent with the Brinkman equation is presented. The method described in this communication both eliminates second order errors in veloci ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860230

56. Acquiring, Analyzing, and Using Complete Three-Dimensional Aggregate Shape Information
Published: 4/1/2001
Authors: Edward Joseph Garboczi, Nicos Martys, H A Saleh, Richard A Livingston
Abstract: The shape of aggregates, from whatever source, plays a crucial role in determining the properties of the composite material in which they are embedded (e.g., asphaltic or portland cement concrete). To properly characterize this three-dimensional sha ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860347

57. Critical Properties and Phase Separation in Lattice Boltzmann Fluid Mixtures
Published: 3/1/2001
Authors: Nicos Martys, Jack F Douglas
Abstract: Basic equilibrium properties of Lattice Boltzmann (LB) fluid mixtures (coexistence curve, surface tension, interfacial profile, correlation length) are calculated to characterize the critical phenomena occurring in these model liquids and to establis ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860263

58. Critical Properties and Phase Separation in Lattice Boltzmann Fluid Mixtures
Published: 1/1/2001
Authors: Nicos Martys, Jack F Douglas
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853775

59. Accelerating Scientific Discovery through Computation and Visualization
Series: Journal of Research (NIST JRES)
Published: 11/1/2000
Authors: James S Sims, John G Hagedorn, Peter M. Ketcham, Steven G Satterfield, Terence J. Griffin, William L George, H A Fowler, B A am Ende, Howard Hung, Robert B Bohn, John E Koontz, Nicos Martys, Charles E. Bouldin, James A Warren, D L Feder, Charles W Clark, Bernard J Filla, Judith Ellen Terrill
Abstract: The rate of scientific discovery can be accelerated through computation and visualization. This acceleration results from the synergy of expertise, computing tools, and hardware for enabling high performance computation, information science, and visu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152135

60. User's Guide to the NIST Virtual Cement and Concrete Testing Laboratory. Version 1.0
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6583
Published: 11/1/2000
Authors: Jeffrey W Bullard, Chiara F Ferraris, Edward Joseph Garboczi, Nicos Martys, Paul E Stutzman
Abstract: This NISTIR serves as the user's manual for Version 1.0 of the Virtual Cement and Concrete Testing Laboratory (VCCTL). Using the VCCTL, a user may create starting microstructures of cement (gypsum, fly ash, etc.) particles in water, hydrate the micr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860310



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