Instructors/Speakers Prof. Kostas Senetakis Assistant Professor Department of Architecture and Civil Engineering City University of Hong Kong Hong Kong Abstract Recent developments in discrete element modeling (DEM) have enhanced our knowledge on the behavior of granular materials including soils, which are complex in nature. This complexity is partly attributed to the interactions of grains at their contacts. However, there has been less progress in experimental methods to measure different micro-quantities at the scale of a grain, particularly quantifying, friction, stiffness and grain surface damage, which would lead to a better understanding of the fundamental micro-mechanisms that control the macro-scale behavior of geo-materials. This would advance our numerical simulations providing realistic input to be used by DEM modelers, therefore improving our ...
seminarslectures
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https://www.fst.um.edu.mo/wp-content/uploads/2020/05/sem20170524_01.jpg |
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Instructors/Speakers Dr. Kai BAO Department of Mathematics & Cybernetics at SINTEF Oslo Norway Abstract In this talk, main topic will be the development of a fully-implicit polymer flooding simulator within MATLAB Reservoir Simulation Toolbox (MRST). We will introduce the background of the reservoir simulation, water-flooding and why we need to use polymer to change the flooding fluid property. Physical equations are presented to describe the polymer flooding process. Then we introduces the key features of MRST, such as its modular design, vectorized implementation, support for general unstructured grids, and automatic differentiation framework, which makes it a very powerful prototyping and experimentation platform for development of new flow models for reservoir simulation. Certain implementation details are discussed and verification against commercial ...
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Instructors/Speakers Dr. Rebecca ALLEN Mathematics and Cybernetics Department of SINTEF Digital Abstract To reduce the amount of anthropogenic carbon dioxide (CO2) that is released to the atmosphere, CO2 can be captured from its point source and injected into subsurface saline aquifers for long-term storage. This concept is known as Carbon Capture and Storage (CCS), and has been put into practice for more than 20 years in Norway. An important question to answer before starting a storage project is how much CO2 may be adequately trapped in a saline aquifer. To estimate this storage capacity, one must consider the flow dynamics involved during injection and post-injection, and simulation software plays an important role in this regard. During the injection period, CO2 ... |
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Instructors/Speakers Prof. Yan YANG Associate Professor School of Mathematics Sun Yat-Sen University China Abstract In this talk, the uncertainty principle for 2D discrete signals associated with quaternion Fourier transform is obtained. As an application, it explains an interesting phenomena in signal recovery problems where there is an interplay of missing data and time-limiting. Biography Prof Yan Yang is an Associate Professor in Sun Yat-Sen University, China. Her Research interest includes Complex Variables，Clifford Analysis，Signal analysis in higher dimensional spaces. Prof. Yan has published more than 25 papers on MMAS, Acta Math Scientia, Integral Operator and Special Functions and so on. |
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