LENG Mengyao, CHANG Shinan, DING Liang. Numerical simulation of droplet impinging and freezing on cold surfaces with different wettability[J]. CIESC Journal, 2016, (7): 2784-2792.
LENG Mengyao, CHANG Shinan, DING Liang. Numerical simulation of droplet impinging and freezing on cold surfaces with different wettability[J]. CIESC Journal, 2016, (7): 2784-2792.DOI: 10.11949/j.issn.0438-1157.20151888.
A strategy is presented to simulate the impact and solidification of the water droplet on different substrates. Simulations were performed using a coupled volume-of-fluid and level-set method to tracking the air-water interface and an enthalpy-porosity method to capture the phase transition. Three surface types were investigated: hydrophilic surface (contact angle 30°)
hydrophobic surface (contact angle 114°) and superhydrophobic surface (contact angle 163°). The results showed that decreasing the wettability would reduce the contact time and area with the cold surface
and delay the freezing of the droplet. When temperature of the surface is higher than -15℃
the superhydrophobic surface can remain entirely ice-free under the simulated conditions. By comparing the maximum droplet spread
retraction response and time for solidification with the experimental results
the effectiveness and precision of the simulation strategy were demonstrated.