Naoki Shikazono

J081013 Evaluation of exchange current density using three dimensional SOFC anode

Gas diffusion models in the lattice Boltzmann method simulation of SOFC Ni-YSZ anode are evaluated using the reconstructed three-dimensional microstructure by focused ion beam scanning electron microscope. Dusty Gas Model (DGM) and Cylindrical Pore Interpolation Model (CPIM) are applied and evaluated. The predicted overpotentials showed small differences between the models. The exchange current density per unit three phase boundary length is estimated from real electrode microstructure and polarization experiment.

G0800-1-3 Study on mist separation using oblique wavy surface

Oblique wavy surface can achieve very high heat transfer enhancement with small pressure loss penalty because it can produce effective secondary flow without separation. In the present study, applicability of oblique wavy surface to gas-liquid separation in mist flows is investigated. Plate, oblique wavy and sine wavy surfaces are tested by air-water experiment. It is confirmed that oblique wavy surface can completely separate liquid droplets whose sizes are larger than approximately 10 microns.