Experimental investigation of surrogate particle transport in a turbulent channel flow: Versatile test reactor program

In this summary, a scaling approach is adopted for surrogate particles to study the particle transport and fission products in the GFR. The scaling is developed to maintain the similarities of Reynolds and Stokes numbers facilitating the use of different kinds of surrogate particles and working fluid on the scaled mode to investigate the particle transport. Experimental measurements on the PCF were performed using aerosol droplets and polypropylene microspheres as surrogate particles of GFR's dusts. Velocity fields of particle transport in the PCF for various Reynolds numbers were acquired using PIV technique and statistical results, such as mean velocity and RMS fluctuating velocity. It is found that the non-dimensional velocity profiles u⁺ agreed well to the universal trend of turbulent boundary layer expressed as a linear relation u⁺ = y⁺ in the viscous sublayer. Characteristics of particle transport in the vicinity of the wall, such as particle relaxation time and particle deposition rates, were computed. It is found that the particle deposition velocity reduced when the friction velocity increased. Further work will be performed to study the particle transport in the PCF with different wall surface materials. Numerical simulations will also be performed and compared against the experiments.