Stanford University
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ERE Seminar: Greeshma Gadikota, PhD, University of Wisconsin – Madison Michael P. Hoepfner, PhD, University of Utah - Multi-Scale Fluid-Solid Interactions in Architected and Natural Materials (MUSE): Dynamic Characterization of Fluids in Confined Space

When:
Monday, Apr 15, 2019 12:30 PM
Where:
Room 104, Green Earth Sciences Building, 367 Panama Street, Stanford
More Info:
ERE Seminar: Greeshma Gadikota, PhD, University of Wisconsin – Madison Michael…
Audience:
Faculty/Staff, Students
Sponsor:
Energy Resources Engineering

Speakers
Greeshma Gadikota, PhD,
 Civil and Environmental Engineering, University of Wisconsin – Madison
Michael P. Hoepfner, PhD, Chemical Engineering, University of Utah

Abstract
Multidisciplinary research holds the key to solving many of the world’s most pressing problems. The MUSE program is a multidisciplinary and multi-institution collaborative Energy Frontier Research Center (EFRC) supported by the Department of Energy. The Center’s objectives range from fabrication and characterization of geomaterials with repeatable hierarchal heterogeneity, to understand the fundamental thermodynamics and transport properties of confined fluids. In this talk, we will first present an overview of the MUSE team, motivating challenges, and scientific objectives. Next, we will probe the thermophysical properties of confined fluids and in situ multi-scale characterization of geo-architected porous media. Steric and surface effects cause significant deviations between fluid properties (e.g., bubble points) from the bulk to confined state. To assess the physical and chemical origins of these properties on the molecular scale, we employ static and dynamic characterization tools. Specifically, we will discuss total neutron scattering to assess the fluid structure and thermodynamics, and nuclear magnetic resonance (NMR) to understand confined kinetic transport properties. To advance the common scientific theme of connecting fluid properties in confined and unconfined environments to the chemo-morphological characteristics of the materials, custom microreactors compatible with synchrotron characterization techniques were developed. This approach has facilitated cross-scale in-operando characterization of fluid-solid interactions using cross-scale X-ray and neutron scattering and tomography techniques our future experimental investigations are supported by predictions of wettability alterations at solid interfaces, and organization and transport of light and heavy hydrocarbon molecules, CO2 and CH4 confined in the nanopores of silica using molecular-scale models. These studies encompass the research philosophy of creating new knowledge by making geo-architected materials and modeling and measuring emergent physical, chemical, and reactive properties of nano-confined fluids in architected and natural materials. This approach is motivated by the need to elucidate the limitations of using Darcy’s description flow in unconventional nanoporous and disordered environments

Bio

Greeshma Gadikota is an is an Assistant Professor of Civil and Environmental Engineering at the University of Wisconsin – Madison. Prof. Gadikota’s research focuses on the integrating in-operando and in-silico characterization of fluid interactions with complex hierarchical and heterogeneous materials with multi-scale reaction kinetics and transport mechanisms. She was selected as the Rising Stars in Civil and Environmental Engineering by MIT in 2015. She received her PhD in Chemical Engineering and earned her MS degrees in Chemical Engineering and Operations Research, all from Columbia University. Her BS in Chemical Engineering is from Michigan State University.

Michael P. Hoepfner is an Assistant Professor of Chemical Engineering at the University of Utah. Prof. Hoepfner’s research focuses on the interaction and assembly of complex molecules in the liquid phase, petroleum phase behavior, molecular simulations, and heterogeneous catalysis. He is the recipient of the NSF CAREER Award and the 2018 AIChE Upstream Engineering and Flow Assurance Forum Award. He completed his BS degree at the University of Utah and PhD at the University of Michigan, both in chemical engineering.

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