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High-Resolution Differential Phase-Contrast (DPC) X-ray Imaging for Multiphase Flow in three-dimensional Porous Media

 

Researchers:

George Herring, PhD Candidate, Stanford University, gherring@stanford.edu
Maha Yusuf, PhD Candidate, Stanford University, myusuf@stanford.edu
Yao-Te Cheng, Engineering Research Associate, Stanford University, ytcheng [at] stanford [dot] edu
Max Yuen, Research Engineer, Stanford University, apbubble [at] stanford [dot] edu
Ching-Wei Chang, Engineering Research Associate, Stanford University, chingwei@stanford.edu

Funding:

Shell Corporation

In this research, we are working on a grating-based Differential Phase-Contrast (DPC) X-ray imaging microscopy system for multiphase fluid flow in three-dimensional porous media. DPC X-ray imaging can be used to retrieve quantitative phase information with polychromatic X-ray sources in a laboratory-based setting1. It differs from traditional X-ray imaging since it provides three different outputs (attenuation, phase contrast, dark-field) instead of one, and uniquely identifies unknown materials with improved image contrast based on the material’s absorption, phase, and scattering coefficients.

DPC X-ray imaging is a promising non-destructive technique that is particularly useful for the study of fluid interfaces (e.g. fluid flow in porous media) and interfacial aspects with increased image contrast, investigation of multi-phase fluid dynamics in 3-D porous rocks, analysis of real-time mechanisms, and direct pore-scale imaging. All of these will significantly improve understanding of the underlying fundamental processes in multi-phase fluid flow.

References:

1. Y. Takashima, J. Kim, Y.T. Cheng, M. Yuen, J. Wilde, and L. Hesselink, “Design of X-ray Differential Phase Contrast Imaging System for High Energy and Wide Spectrum X-ray Applications,” in CLEO, 2014.

 

 

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