Influences of various vortex structures on the dispersion and deposition of small ash particles

An Early Stage of Aerosol Particle Transport in Flows Past Periodic Arrays of Clear Staggered Obstructions: A Computational Study

“…Images are captured at the time when the number of particles crossing the right boundary achieves 42,000. Re = 100. of the vortex structures (Yu et al 2004;Li et al 2008;Yao et al 2009;Yao et al 2012). As expected, most particle-surface collisions (d p = 5 μm, 1 μm, and 300 nm) are observed on the front surface of cylinders and this result further supports the indication from the data of Re = 100 in Figure 2 where deposit formation is dominated by inertia impaction.…”

“…Recently, a 3-D model was proposed by Xu et al (2013) to track fine particle motion in laminar flows past a triangular cylinder. In addition to the investigations on particle-surface collisions in obstructed flows, different research groups (Yu et al 2004;Li et al 2008;Yao et al 2009;Yao et al 2012) proposed computer models to study the effect of vortex structures on the particle transport in which particle forces in the Lagrangian particle equations were lift, drag, and gravity effects.…”

Gas-side fouling, erosion and corrosion of heat exchanger for middle and low temperature flue gas waste heat recovery

“…但是由于大 量的研究主要集中在颗粒与壁面的法向碰撞方面, 而 对于倾斜碰撞的研究相对较少. 故Konstandopoulos [14] 针对颗粒倾斜碰撞引入了临界碰撞角的判据, 当入 [16] 利用分离涡模拟(DES)方法模拟了不同涡结 构、颗粒直径、流速等对飞灰颗粒沉积特性的影响.…”

Deposition of dry particles on a fin-and-tube heat exchanger by a coupled soft-sphere DEM and CFD

“…Li et al [21] propose that both particle size, shape and properties are important factors in the fouling process. While fouling of larger particles is dominated by inertial impact, smaller particles deposit by eddy transport and thermophoresis [22].…”