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Full-Text Articles in Mechanical Engineering

Dynamic Grid Adaptation Using The Mpdata Scheme, John P. Iselin, Joseph M. Prusa, William J. Gutowski Apr 2002

Dynamic Grid Adaptation Using The Mpdata Scheme, John P. Iselin, Joseph M. Prusa, William J. Gutowski

Geological and Atmospheric Sciences Publications

A dynamic grid adaptation (DGA) scheme is developed using various combinations of the multidimensional positive definite advection transport algorithm (MPDATA) to show the applicability of DGA with the MPDATA scheme to solve advection problems. A one-dimensional model is used to show the effects of varying the number of grid points and the parameters that control the grid redistribution scheme, to determine a stability criteria for the scheme and to investigate the effect of several MPDATA options. A two-dimensional model is used to show the applicability of the scheme in multiple dimensions and to illustrate the effects of DGA in combination ...


Conceptual And Scaling Evaluation Of Vehicle Traffic Thermal Effects On Snow/Ice-Covered Roads, Joseph M. Prusa, Moti Segal, Bradley R. Temeyer, William A. Gallus Jr., Eugene S. Takle Jan 2002

Conceptual And Scaling Evaluation Of Vehicle Traffic Thermal Effects On Snow/Ice-Covered Roads, Joseph M. Prusa, Moti Segal, Bradley R. Temeyer, William A. Gallus Jr., Eugene S. Takle

Geological and Atmospheric Sciences Publications

The potential thermal effects of traffic on road surface thermal energy balance under frost/snow cover conditions have been largely ignored in meteorological evaluations of road ice deposit conditions. Preliminary exploration of these effects, particularly for heavy traffic scenarios with calm wind conditions and an ambient temperature of 0°C, is provided in this study using a conceptual model. Observational data were used to constrain the model, and parameterizations were employed to estimate the various heat transfer processes involved. The results indicate that, for heavy traffic situations, as well as for stopped traffic at intersections, the traffic thermal flux contribution ...