Saturation Vapour Pressure

2016 ◽  
Author(s):  
Jack G. Calvert
Keyword(s):  
Vapour Pressure ◽  
Saturation Vapour Pressure

Observation of cavitation inception in separating water flows through constricted channels

2009 ◽  
Vol 223 (9) ◽  
pp. 2071-2080 ◽  
Author(s):  
S Washio ◽  
S Fujiyoshi ◽  
S Takahashi
Keyword(s):  
High Resolution ◽  
Research Group ◽  
Vapour Pressure ◽  
Reynolds Numbers ◽  
Separation Point ◽  
Time And Space ◽  
Cavitation Inception ◽  
Water Flows ◽  
Saturation Vapour Pressure ◽  
Very High

The research group including two of the present authors previously discovered a surprising phenomenon in oil flows through constricted channels; at a certain flowrate when there is no cavitation occurring, an infinitesimal cavity suddenly emerges on the wall where the flow separates. The newborn cavity grows and splits releasing many minute bubbles to downstream, as the flowrate increases. To see if this phenomenon occurs in water too, water flows through rectangular and cylindrical constrictions have been meticulously observed with very high resolution in terms of both time and space. As a result it has been confirmed that the same phenomenon does occur in separating water flows as well, although the developing process of a newborn cavity in water flows is different from that in oil flows probably depending on a large difference in Reynolds numbers between both flows. When the flowrate is substantially increased from that for the cavity inception, a large attached cavity is formed on the wall just downstream of the separation point, as it occurred in corresponding oil flows. The pressure inside the cavity has proved to be almost equal to the saturation vapour pressure of water.

Effects of increasing saturation vapour pressure deficit on growth and ABA levels in black spruce and jack pine

Trees ◽  
1997 ◽  
Vol 11 (4) ◽  
pp. 223 ◽  
Author(s):  
Alan B. Darlington ◽  
Anna Halinska ◽  
James F. Dat ◽  
T. J. Blake
Keyword(s):  
Vapour Pressure ◽  
Black Spruce ◽  
Vapour Pressure Deficit ◽  
Jack Pine ◽  
Saturation Vapour Pressure

Performance of the Castor Oil in Methanol-Gasoline as a Bi-Functional Additive

2018 ◽  
Vol 777 ◽  
pp. 232-237 ◽  
Author(s):  
Jing Fang Xu ◽  
Yu Ying Xue ◽  
Man Liu ◽  
Fa Wang Zhang ◽  
Ying Tang ◽  
...  
Keyword(s):  
Phase Separation ◽  
Phase Stability ◽  
Vapour Pressure ◽  
Castor Oil ◽  
Phase Separation Temperature ◽  
Functional Additive ◽  
Oil Derivatives ◽  
Separation Temperature ◽  
Saturation Vapour Pressure

In this paper, the castor oil, as additives, has been investigated on the phase separation temperature of M15, M30, M50 and M65 methanol gasoline at-25.0°C to 40.0°C, respectively. The effect of the additives on the phase stability and saturation vapour pressure was discussed. It was found that castor oil derivatives have good phase stability to various ratio methanol gasoline blends. Introducing water in the methanol gasoline blends need much amount of methyl castor oil to realize phase mixable. Besides, the castor oil can depress the saturation vapour pressure of methanol gasoline effective as well. With these data, it can be concluded that the castor oil have the great potential to be used gasoline-methanol additives.

Significance of the Coupling between Saturation Vapour Pressure Deficit and Rainfall in Monsoon Climates

1986 ◽  
Vol 22 (4) ◽  
pp. 329-338 ◽  
Author(s):  
J. L. Monteith
Keyword(s):  
Vapour Pressure ◽  
Dry Matter ◽  
Vapour Pressure Deficit ◽  
Supplemental Irrigation ◽  
First Case ◽  
Matter Production ◽  
Screen Height ◽  
Saturation Vapour Pressure ◽  
The Mean ◽  
Image Position

SUMMARYIn monsoon climates, the mean daytime saturation vapour pressure deficit (D), measured at screen height, decreases from a maximum of 3–4 kPa attained several months before rain arrives to a minimum of 0.5–1 kPa in the month of highest rainfall. Climatic records from India and West Africa were analysed to give the relation between D and precipitation (P mm month−1) as:where n ranged from 0.5 to 0.9 between stations.The dependence of dry matter production on D and therefore on P is evaluated when growth is restricted by rain and when this restriction is removed by irrigation. In the first case, the decrease in demand for water associated with a decrease in D is comparable in importance with the increase of water supply (P). The analysis has implications for the marginal response of crops to supplemental irrigation and for the interpretation of experiments with a line-source or rain-shelter.

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