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RISAnalysis of an Image-Based Method to Quantify the Size and Shape of Sand Particles
Publisher: American Society of Civil Engineers
Abstract: Sand response depends on particle morphology (size and shape). In geotechnical research and practice, size is typically assessed by sieve analysis and particle shapes are qualitatively described. Technological developments ...
Rossby Wave Propagation an Beta-Planes
Publisher: American Meteorological Society
Abstract: The numerical modeling of stratospheric, quasi-geostrophic Rossby wave propagation on a beta-plane channel is examined to determine how wave propagation is affected by the use of low horizontal (spectral) resolution. This ...
Particle-Based Discrete Element Modeling: Geomechanics Perspective
Publisher: American Society of Civil Engineers
Abstract: This paper is a review of the use of particulate discrete element modeling (DEM) in geomechanics. The overall objective of the paper is to serve as an introduction to researchers and practitioners in geomechanics who are ...
A Perspective on Darcy’s Law across the Scales: From Physical Foundations to Particulate Mechanics
Publisher: ASCE
Abstract: This paper puts forward a perspective or opinion that we can demonstrate Darcy’s law is valid at any scale where fluid can be modeled/analyzed as a continuum. Darcy’s law describes the flow of a fluid through a porous ...
Advancing Understanding of the Influence of Drained Cyclic Loading on Sand Behavior Using DEM
Publisher: ASCE
Abstract: Understanding the response of sand to drained cyclic loading is relevant to the design of abutments of integral bridges and foundations of wind turbines among other applications. In this study, the discrete element method ...
A Single-Stage Ammonia/Water Absorption Cycle With Integrated Heat Exchange Components
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Thermodynamic analysis of the single-stage ammonia/water cycle indicates the importance of close temperature approach in the counter-current heat exchanges of the cycle and of recovering useful ...
Sliding Contact Stress Field Due to a Spherical Indenter on a Layered Elastic Half-Space
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The quasi-static sliding contact stress field due to a spherical indenter on an elastic half-space with a single layer is studied. The contact problem is solved using a least-squares iterative ...
Coupling of the Quasi-biennial Oscillation and the Extratropical Circulation in the Stratosphere through Planetary Wave Transport
Publisher: American Meteorological Society
Abstract: A significant fraction of the interannual variability of the wintertime stratosphere in the Northern Hemisphere is related to the quasi-biennial oscillation (QBO) in tropical winds. Disturbed conditions of the polar night ...
Realizing the Potential of Vehicle-Based Observations
Publisher: American Meteorological Society
Abstract: tial availability of millions of surface observations from passenger vehicles and fleets represents a potentially significant opportunity for the weather community. The success of this opportunity rests with the weather ...
Modeling the Quasi-biennial Oscillation's Effect on the Winter Stratospheric Circulation
Publisher: American Meteorological Society
Abstract: The influence of the equatorial quasi-biennial oscillation (QBO) on the winter middle atmosphere is modeled with a mechanistic global primitive equation model. The model's polar vortex evolution is sensitive to the lower ...