Download Non-Equilibrium Phenomena near Vapor-Liquid Interfaces by Alexei Kryukov, Vladimir Levashov, Puzina Yulia PDF
By Alexei Kryukov, Vladimir Levashov, Puzina Yulia
This booklet offers info at the improvement of a non-equilibrium method of the research of warmth and mass move difficulties utilizing vapor-liquid interfaces, and demonstrates its software to a extensive variety of difficulties. within the method, the subsequent peculiarities develop into obvious: 1. At vapor condensation at the interface from gas-vapor blend, non-condensable parts can lock up the interface floor and condensation stops thoroughly. 2. on the evolution of vapor movie at the heater in superfluid helium (He-II), the boiling mass flux density from the vapor-liquid interface is successfully 0 on the macroscopic scale. three. In difficulties about the movement of He-II bridges within capillaries crammed by means of vapor, within the presence of axial warmth flux the He-II bridge can't circulate from the heater as might a conventional liquid, yet within the wrong way in its place. hence the heater draws the superfluid helium bridge. four. the form of liquid-vapor interface at movie boiling at the axis-symmetric warmers immersed in liquid vastly relies on warmth flux within the interface. hence a brand new kind of hydrostatic difficulties seems whilst unlike conventional statements the form of the liquid-vapor interface has a posh profile with some degree of inflection and a delicate go out on a unfastened liquid surface.
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Additional resources for Non-Equilibrium Phenomena near Vapor-Liquid Interfaces
Example text
Sphere from water of radius Rw floats in the saturated liquid nitrogen. Pressure over the free surface of liquid Pb is known (Fig. 1). Stable vapor film is formed due to the high temperature of the drop Tw. Axisymmetric shape of the vapor–liquid interface is described in a cylindrical coordinate system z, r. The lower (front) point of the interface located on the vertical axis of the sphere is considered as the coordinate origin. Distance from the origin to the free surface of the liquid h0 and immersion depth of the drop hw are determined by the problem solution.
3— free liquid level 2,5 700 3 600 2 500 300 200 1 1 К, 1/m z, mm 400 1,5 100 2 0 0,5 -100 0 -200 0 1 2 r, mm 3 4 Obviously, the surface shape is spherical in this point, but the radius of curvature R0 is determined in the solution process. The second boundary condition is given for the liquid free surface, the derivative dz/dr is equal zero. The parameter K0 is chosen that in addition to the boundary conditions, the distance from the top of the curve z(r) to the free liquid level was minimal. 46 mm.
1 Motion of Helium II Bridges in Capillary Channels with Vapor at the Presence of Longitudinal Heat Flux This problem was analyzed by Kryukov and Korolev for ordinary liquids [3, 4], Kryukov and Korolev for helium II [5]. A. 1007/978-3-319-00083-1_4, Ó The Author(s) 2013 25 26 4 Motion of Vapor–Liquid Interfaces In various two-phase systems cases are possible during heat supply when an evaporating liquid flows in a channel filled by vapor. At certain conditions, nonequilibrium effects characteristic of the evaporation and condensation problems may play an important part in the case of such flow.