Simulation calculation program using VB6. 0language computers the liquid film’s flowing and evaporatingcharacters respectively whether heat transfer occur or not, anddrawing the distributing curves of film thickness δ film radialvelocity u and film surface temperature Ts, summarizing the rules.
This article uses the white light interference principle of Michelson inteferometer to analyse the thickness change in dynamic process when the liquid film is Pulling and shedding It provides the scientific basis for the esttmation of thickness of liquid film in experiment of meastring the surface tension coefficcient.
The results show that with the increase in the rate of welding thermal cycle, the solid dissolution of precipitate prior to liquation decreases and the thickness of liquid film produced by constitutional liquation increases.
As a result, the residual liquid film still maintains a great thickness at the moment when temperature is down to the eutectic point, which will promote HAZ micro-fissuring.
Nonlinear Phenomena in Evaporating Thin Liquid Film Flow
The studies of Kapitsa initiated the detailed experimental and theoretical study of the flow of a thin layer of viscous liquid (liquid film) over a solid surface [1-2].
Steady-state small-amplitude waves on the surface of a viscous liquid film in a coflowing gas stream (inclined channel)