TY - JOUR
T1 - Dynamic behaviors of impacting nanofluid droplets on hydrophilic vibrating surfaces with gigahertz-order frequency
AU - Peng, Niming
AU - Wang, Lanlan
AU - Wei, Rong
AU - Fang, Yi
AU - Zhang, Zhenghui
AU - Chen, Bangdao
AU - Jiang, Wei
AU - Li, Guojun
AU - Liu, Hongzhong
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2026/3/5
Y1 - 2026/3/5
N2 - The vibration of solid surfaces is universal in nature and industry, giving rise to the multifarious dynamics of droplets on them. The dynamic behaviors of nanofluid droplets impacting on hydrophilic vibrating solid surfaces have been explored by molecular dynamics (MD). Specifically, the coupled effects of droplet properties and substrate vibration dynamics have been examined. Four impacting modes: Adhesion and Oscillation mode (AO mode), Up and Down mode (UD mode), Rebound mode (R mode), and Impact breakup mode (IB mode) are identified by analyzing the droplet’s morphological evolution and energy conversion. In high frequency–high amplitude ( f H, A H) regions, the IB mode is triggered, resulting in a rebounding droplet with large kinetic energy. The R mode is achieved at the large vibration Weber number ( We v) and is adjustable by the Weber number of droplet ( We ). A classification model of nanofluid droplet impacting behavior has been established to forecast the morphological evolution on vibration surfaces by We and We v. Especially, the empirical criterion has been given to build the integrity and rebound configurations of impacting nanofluid droplets on a vibration surface, as ( We v/ We )1/2 = n . This study offers molecular insights into the physics of nanofluid droplets impacting on hydrophilic vibrating surfaces, devoting itself to exploring the manageable dynamic behaviors of vibrating droplets in droplet atomization, surface acoustic wave (SAW) devices, nanofluidic systems, and droplet-based 3D printing.
AB - The vibration of solid surfaces is universal in nature and industry, giving rise to the multifarious dynamics of droplets on them. The dynamic behaviors of nanofluid droplets impacting on hydrophilic vibrating solid surfaces have been explored by molecular dynamics (MD). Specifically, the coupled effects of droplet properties and substrate vibration dynamics have been examined. Four impacting modes: Adhesion and Oscillation mode (AO mode), Up and Down mode (UD mode), Rebound mode (R mode), and Impact breakup mode (IB mode) are identified by analyzing the droplet’s morphological evolution and energy conversion. In high frequency–high amplitude ( f H, A H) regions, the IB mode is triggered, resulting in a rebounding droplet with large kinetic energy. The R mode is achieved at the large vibration Weber number ( We v) and is adjustable by the Weber number of droplet ( We ). A classification model of nanofluid droplet impacting behavior has been established to forecast the morphological evolution on vibration surfaces by We and We v. Especially, the empirical criterion has been given to build the integrity and rebound configurations of impacting nanofluid droplets on a vibration surface, as ( We v/ We )1/2 = n . This study offers molecular insights into the physics of nanofluid droplets impacting on hydrophilic vibrating surfaces, devoting itself to exploring the manageable dynamic behaviors of vibrating droplets in droplet atomization, surface acoustic wave (SAW) devices, nanofluidic systems, and droplet-based 3D printing.
KW - Behavior classification
KW - Impacting mode
KW - Molecular dynamics
KW - Nanofluid droplets
KW - Vibrating surface
UR - https://www.scopus.com/pages/publications/105024380392
U2 - 10.1016/j.colsurfa.2025.139194
DO - 10.1016/j.colsurfa.2025.139194
M3 - 文章
AN - SCOPUS:105024380392
SN - 0927-7757
VL - 732
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 139194
ER -