1. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An X-Ray Tomography Based Lattice Boltzmann Simulation Study on Gas Diffusion Layers of Polymer Electrolyte Fuel Cells J. Fuel Cell Sci. Technol. 2010;7(3):031015-031015-12. doi:10.1115/1.3211096 Fuel cell processes Figure Legend:

2. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An X-Ray Tomography Based Lattice Boltzmann Simulation Study on Gas Diffusion Layers of Polymer Electrolyte Fuel Cells J. Fuel Cell Sci. Technol. 2010;7(3):031015-031015-12. doi:10.1115/1.3211096 Active elements in a D3Q19 LB cube Figure Legend:

3. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An X-Ray Tomography Based Lattice Boltzmann Simulation Study on Gas Diffusion Layers of Polymer Electrolyte Fuel Cells J. Fuel Cell Sci. Technol. 2010;7(3):031015-031015-12. doi:10.1115/1.3211096 The treatment of gas-solid boundary for the bounce-back method in the x-y plane of a LB cube; the shadowed area is solid and the white is void space; the line ABC is the boundary Figure Legend:

4. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An X-Ray Tomography Based Lattice Boltzmann Simulation Study on Gas Diffusion Layers of Polymer Electrolyte Fuel Cells J. Fuel Cell Sci. Technol. 2010;7(3):031015-031015-12. doi:10.1115/1.3211096 Schematic of micro- and nanotomography systems Figure Legend:

5. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An X-Ray Tomography Based Lattice Boltzmann Simulation Study on Gas Diffusion Layers of Polymer Electrolyte Fuel Cells J. Fuel Cell Sci. Technol. 2010;7(3):031015-031015-12. doi:10.1115/1.3211096 Nanotomography of a carbon paper GDL sample with 680 nm spatial resolution. Sample size is 600×250×700(X×Y×Z) μm3. Figure Legend:

6. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An X-Ray Tomography Based Lattice Boltzmann Simulation Study on Gas Diffusion Layers of Polymer Electrolyte Fuel Cells J. Fuel Cell Sci. Technol. 2010;7(3):031015-031015-12. doi:10.1115/1.3211096 Flowchart for the X-ray microtomography and lattice Boltzmann imaging and simulation process Figure Legend:

7. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An X-Ray Tomography Based Lattice Boltzmann Simulation Study on Gas Diffusion Layers of Polymer Electrolyte Fuel Cells J. Fuel Cell Sci. Technol. 2010;7(3):031015-031015-12. doi:10.1115/1.3211096 The overall 3D shadow image of carbon paper GDL captured using X-ray microtomography and the 14 regions for the LB simulations Figure Legend:

8. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An X-Ray Tomography Based Lattice Boltzmann Simulation Study on Gas Diffusion Layers of Polymer Electrolyte Fuel Cells J. Fuel Cell Sci. Technol. 2010;7(3):031015-031015-12. doi:10.1115/1.3211096 Through-plane absolute permeability in the y-direction; the simulated absolute permeability for regions 1–14, the mean simulated absolute permeability, and the measured absolute permeability for the carbon paper GDL Figure Legend: