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Displaying 2776 - 2800 of 3902

Scalar Dissipation in Axisymmetric Jets

November 21, 1999
Author(s)
William M. Pitts
Scalar dissipation, defined as twice the product of the molecular diffusion coefficient and the local gradient of the mixture fraction taken as a dot product with itself, characterizes molecular mixing rates in turbulent flows and has a central role in

Heat Flux Transducer Calibration: Summary of the 2nd Workshop

November 1, 1999
Author(s)
William L. Grosshandler
The second workshop on heat flux gauge calibration was organized to share the results of an effort to expand competence at NIST, and to examine the recommendations made at a previous workshop on heat flux gauge calibration. Over 40 attendees were drawn

Polymer Composites for Repairing of Portland Cement Concrete: Compatibility Project

November 1, 1999
Author(s)
L Czarnecki, A Garbacz, P Lukowski, J R. Clifton
The impetus for this project has been the continuing deterioration of, and the necessity to repair, a large stock of concrete structures. A two-component system, portland cement concrete (substrate) in contact with a polymer composite (repair) is produced

Selecting Cost-Effective Green Building Products: BEES Approach

November 1, 1999
Author(s)
Barbara C. Lippiatt
The BEES (Building for Environmental and Economic Sustainability) software implements a rational, systematic technique for balancing the environmental and economic performance of building products. The technique is based on consensus standards and designed

Polymer Layered-Silicate Nanocomposites: Polyamide-6, Polypropylene and Polystyrene

October 24, 1999
Author(s)
Jeffrey W. Gilman, A B. Morgan, Richard H. Harris Jr., E Manias, E P. Giannelis, M Wuthenow
In many of the cases studied, polymer-clay nanocomposites are materials that have improved thermal properties. Furthermore, most of the nanocomposite systems reported so far show reduced flammability. The delaminated versions of nanocomposites also offer

Energy Conserving Discrete Equation for Non-Ideal Systems

October 20, 1999
Author(s)
Nicos Martys
The BBGKY formalism is utilized to obtain a set of moment equations to be satisfied so as to obtain an energy conserving discrete Boltzmann equation for the case of a non-local interaction potential. A modified BGK form of the collision operator consistent

Diffusion in Partially Saturated Porous Materials

October 1, 1999
Author(s)
Nicos Martys
The diffusive transport of ions in two classes of porous media was studied as a function of fluid saturation and wetting properties. A lattice Boltzmann method was used to model phase separation of a binary mixture, including wetting effects, in porous

Effect of Heating Boundary Conditions on Pool Boiling Experiments

October 1, 1999
Author(s)
J Darabi, M M. Ohadi, M A. Fanni-Tabrizi, S V. Dessiatoun, Mark A. Kedzierski
The two widely used experimental methods for pool boiling experiments are evaluated. Boiling heat transfer data employing either the water or electric heating method obtained by various researchers are compared and discussed. The electric heating method is

Energy Conserving Discrete Boltzmann Equation for Nonideal Systems

October 1, 1999
Author(s)
Nicos Martys
The BBGKY formalism is utilized to obtain a set of moment equations to be satisfied by the collision operator in an energy conserving discrete Boltzmann equation for the case of a nonlocal interaction potential. A modified BGK form of the collision
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