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Full-Text Articles in Engineering Science and Materials

Model Development And Experimental Validation Of Pressure Independent Hydronic Circuits, Justin Thomas Bellucci Jan 2012

Model Development And Experimental Validation Of Pressure Independent Hydronic Circuits, Justin Thomas Bellucci

Civil Engineering Graduate Theses & Dissertations

Computer modeling is quickly becoming a more accessible method to evaluate the performance of complex building systems, due in part to the recent advance in computing power over the last decade. Rising energy costs, stricter building codes, the threat of global climate change and governmental pressure have all influenced building owners, architects, engineers and system operators to design and operate the world's building stock in a more energy efficient manner. Particularly important in large buildings and campuses are the hydronic flow networks that deliver chilled water to the cooling coils in air handling units for the purpose of regulating ...


The Influence Of Representative Volume Element Size, Soil Fabric, And Interparticle Elasto-Plasticity In Three-Dimensional Ellipsoidal Discrete Element Modeling Of Granular Assemblies, Yevgeniy Kaufman Jan 2012

The Influence Of Representative Volume Element Size, Soil Fabric, And Interparticle Elasto-Plasticity In Three-Dimensional Ellipsoidal Discrete Element Modeling Of Granular Assemblies, Yevgeniy Kaufman

Civil Engineering Graduate Theses & Dissertations

In this comparative study of RVEs, a DEM code ELLIP3D is utilized to simulate quartz sand in triaxial compression tests with particle assemblies attained from an in situ fabric generated by synchrotron X-ray microcomputed tomography. In order to attain meaningful results for engineered systems at the macroscopic scale using DEM, RVE volume sizes play a significant role in the accuracy of simulating physical experiments. Simulation time or the number of particles limits the capacity of DEM to simulate large-scale granular systems, which is why it is crucial to determine an efficient quantity and quality of RVEs.

ELLIP3D simulations have been ...