TY - JOUR
T1 - Contact line arrest in solidifying spreading drops
AU - De Ruiter, Riëlle
AU - Colinet, Pierre
AU - Brunet, Philippe
AU - Snoeijer, Jacco H.
AU - Gelderblom, Hanneke
PY - 2017/4/1
Y1 - 2017/4/1
N2 - When does a drop, deposited on a cold substrate, stop spreading? Despite the practical relevance of this question, for example, in airplane icing and three-dimensional metal printing, the detailed mechanism of arrest in solidifying spreading drops has remained debated. Here we consider the spreading and arrest of hexadecane drops of constant volume on two smooth wettable substrates: copper with a high thermal conductivity and glass with a low thermal conductivity. We record the spreading radius and contact angle in time for a range of substrate temperatures. The experiments are complemented by a detailed analysis of the temperature field near the rapidly moving contact line, by means of similarity solutions of the thermohydrodynamic problem. Our combined experimental and theoretical results provide strong evidence that the spreading of solidifying drops is arrested when the liquid at the contact line reaches a critical temperature, which is determined by the effect of kinetic undercooling.
AB - When does a drop, deposited on a cold substrate, stop spreading? Despite the practical relevance of this question, for example, in airplane icing and three-dimensional metal printing, the detailed mechanism of arrest in solidifying spreading drops has remained debated. Here we consider the spreading and arrest of hexadecane drops of constant volume on two smooth wettable substrates: copper with a high thermal conductivity and glass with a low thermal conductivity. We record the spreading radius and contact angle in time for a range of substrate temperatures. The experiments are complemented by a detailed analysis of the temperature field near the rapidly moving contact line, by means of similarity solutions of the thermohydrodynamic problem. Our combined experimental and theoretical results provide strong evidence that the spreading of solidifying drops is arrested when the liquid at the contact line reaches a critical temperature, which is determined by the effect of kinetic undercooling.
UR - http://www.scopus.com/inward/record.url?scp=85035344967&partnerID=8YFLogxK
U2 - 10.1103/PhysRevFluids.2.043602
DO - 10.1103/PhysRevFluids.2.043602
M3 - Article
AN - SCOPUS:85035344967
SN - 2469-990X
VL - 2
JO - Physical review fluids
JF - Physical review fluids
IS - 4
M1 - 043602
ER -