Research on Spreading Dynamics of Liquid-liquid drivn

Concentration and temperature gradient on a surface can induces liquid convection, known as Marangoni effect. The effect has been extensively studied to understand its fundamental underlying physics industrial applications. In this paper silicone oil is chosen the driving liquid, N-hexadecane driven liquid. By observing spreading process of by Silicon sodium dodecyl sulfate (SDS) solution, study droplet in three-phase system. experiment shows that, Silicone spreads from inside out, forming ring structure. According dynamic behavior internal external boundaries ring, law influence volume velocity investigated. Analysis that,in initial stage, four-phase contact line(internal boundary) between oil, air, water dominated gravity. scaling radius R line range R~t^{1/4}~ R~t^{1/2}. On gravity , larger faster spreads. But no whole process. next interfacial tension gradient. distance conforms R~t^{3/4}. Under driven, thickness at (internal increases, it leads increases angle (external . increase produce line. drives boundary spread. Because gradient, R~t^{3/4}