Pressure and velocity distributions in a vapor flow through narrow orifices during sublimation under vacuum

1972 ◽  
Vol 22 (5) ◽  
pp. 562-566 ◽  
Author(s):  
P. A. Novikov ◽  
G. L. Malenko ◽  
L. Ya. Lyubin ◽  
V. I. Balakhonova
Keyword(s):  
Vapor Flow ◽  
Flow Through

Magma degassing buffered by vapor flow through brecciated conduit margins

Geology ◽  
2004 ◽  
Vol 32 (4) ◽  
pp. 349 ◽  
Author(s):  
A.C. Rust ◽  
K.V. Cashman ◽  
P.J. Wallace
Keyword(s):  
Vapor Flow ◽  
Magma Degassing ◽  
Flow Through

scholarly journals An apparatus for measurement of simultaneous heat and water vapor flow through 4 x 8 ft. insulated panels

1953 ◽  
Author(s):  
Henry E Robinson ◽  
F J Powlitch ◽  
M A Barron ◽  
P R Achenbach
Keyword(s):  
Water Vapor ◽  
Vapor Flow ◽  
Flow Through ◽  
Simultaneous Heat

Evaporation from a surface and vapor flow through a plane channel into a vacuum

1996 ◽  
Vol 31 (1) ◽  
pp. 127-133 ◽  
Author(s):  
I. N. Larina ◽  
V. A. Rykov ◽  
E. M. Shakhov
Keyword(s):  
Plane Channel ◽  
Vapor Flow ◽  
Flow Through

Experiments on Transient Condensing Flow through a Porous Medium

1980 ◽  
Vol 102 (3) ◽  
pp. 489-494 ◽  
Author(s):  
R. H. Nilson ◽  
P. C. Montoya
Keyword(s):  
Leading Edge ◽  
Vapor Flow ◽  
Axial Distribution ◽  
Pressure Profiles ◽  
High Pressure High Temperature ◽  
Flow Through ◽  
Phase Change Flows ◽  
Edge Temperature ◽  
Combustion Processes

A cold, initially-dry column of sand receives a sudden inflow of dry saturated Freon vapor (CCl3F) from a high-pressure high-temperature reservoir. Condensation occurs as the hot vapor penetrates into the cold sand, resulting in a co-current liquid/vapor flow. The axial distribution of condensate is wave-like with a (Buckley/Leverett-type) saturation-jump on the leading edge. Temperature and pressure profiles are in good agreement with a simple integral analysis which includes the essential features of the process: vapor-phase mass transfer, fluid/solid energy transfer by condensation, and liquid-phase flooding of the pore volume. The reported ensemble of experiments confirms the theoretical model over a broad range of saturation (from nearly dry to liquid-full) and over a broad range of Reynolds number (from Darcy flow to inertia-dominated flow). The considered problem is exemplary of the phase-change flows which occur in a number of geologic applications: containment of underground nuclear tests, steam stimulation of oil fields, geothermal energy, and in situ combustion processes.

Investigation of Geometry, Total Condition and Waves Effect on Two Phase Liquid-Vapor Flow Using Equilibrium Thermodynamics

2012 ◽  
Author(s):  
H. Beheshti Amiri ◽  
A. A. Piroozi ◽  
S. Hamidi ◽  
M. J. Kermani
Keyword(s):  
Steam Turbine ◽  
Turbine Blade ◽  
Ideal Gas ◽  
Steam Flow ◽  
Vapor Flow ◽  
Equilibrium Thermodynamics ◽  
Two Phase ◽  
Expansion Fan ◽  
Steam Turbine Blade ◽  
Flow Through

In this paper, a numerical method is presented to solve the two-dimensional two-phase steam flow over a series of geometries (such as nozzles, expansion corners and steam turbine blade-to-blade passages) by means of equilibrium thermodynamics model. The flow is assumed to be compressible and inviscid and obeys the ideal gas equation of state. The resulted equations are then numerically solved by the Roe’s FDS time marching scheme that has recently been modified to allow for two-phase effects. Validations of condensing steam flow through vapor nozzles have been performed, where good agreement has been achieved. Detailed parametric studies monitoring the influence of (I) the geometry expansion rate, (II) the inlet total temperature and pressure, and (III) the expansion fan or shock waves on the location of condensation onset and the rate of condensation are given. Finally as a case study, expansion of steam flow through a steam turbine blade-to-blade passage is considered, and condensation or evaporation of the steam flow through the passage and fate of the wet flow through the fan or shocks were observed.

Development of apical pits in chloride cells of the gills of Pimephales promelas after chronic exposure to acid water

1983 ◽  
Vol 41 ◽  
pp. 462-463
Author(s):  
Richard L. Leino ◽  
Jon G. Anderson ◽  
J. Howard McCormick
Keyword(s):  
Confidence Interval ◽  
Chronic Exposure ◽  
Lake Superior ◽  
Pimephales Promelas ◽  
Chloride Cells ◽  
Fathead Minnows ◽  
Secondary Lamellae ◽  
Untreated Water ◽  
Water Ph ◽  
Flow Through

Groups of 12 fathead minnows were exposed for 129 days to Lake Superior water acidified (pH 5.0, 5.5, 6.0 or 6.5) with reagent grade H2SO4 by means of a multichannel toxicant system for flow-through bioassays. Untreated water (pH 7.5) had the following properties: hardness 45.3 ± 0.3 (95% confidence interval) mg/1 as CaCO3; alkalinity 42.6 ± 0.2 mg/1; Cl- 0.03 meq/1; Na+ 0.05 meq/1; K+ 0.01 meq/1; Ca2+ 0.68 meq/1; Mg2+ 0.26 meq/1; dissolved O2 5.8 ± 0.3 mg/1; free CO2 3.2 ± 0.4 mg/1; T= 24.3 ± 0.1°C. The 1st, 2nd and 3rd gills were subsequently processed for LM (methacrylate), TEM and SEM respectively.Three changes involving chloride cells were correlated with increasing acidity: 1) the appearance of apical pits (figs. 2,5 as compared to figs. 1, 3,4) in chloride cells (about 22% of the chloride cells had pits at pH 5.0); 2) increases in their numbers and 3) increases in the % of these cells in the epithelium of the secondary lamellae.

Sign in / Sign up

Export Citation Format

Share Document