ISSN:
1573-1634
Keywords:
Characteristic
;
wavespeed
;
shock
;
expansion fan
;
Rankine-Hugoniot equations
;
entropy inequality
;
two-phase flow
;
counterflow
;
saturation
;
pressure
;
convection
;
diffusion
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Technology
Notes:
abstract New concepts are introduced to describe single-component two-phase flow under gravity. The phases can flow simultaneously in opposite directions (counterflow), but information travels either up or down, depending on the sign of the wavespeedC. Wavespeed, saturation and other quantities are defined on a two-sheeted surface over the mass-energy flow plane, the sheets overlapping in the counterflow region. A saturation shock is represented as an instantaneous displacement along a line of constant volume fluxJ Q in the flow plane. Most shocks are of the wetting type, that is, they leave the environment more saturated after their passage. When flow is horizontal all shocks are wetting, but it is a feature of vertical two-phase flow that for sufficiently small mass and energy flows there also exist drying shocks associated with lower final saturations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00617113
