Ignition of porous bodies under conditions of counterflow nonstationary filtration of a gas

2000 ◽  
Vol 36 (4) ◽  
pp. 442-451 ◽  
Author(s):  
B. S. Seplyarskii
Keyword(s):  
Porous Bodies ◽  
Nonstationary Filtration

Nonstationary filtration of a gas to a spherical sink

1972 ◽  
Vol 8 (3) ◽  
pp. 335-337 ◽  
Author(s):  
V. A. Isyakaev ◽  
G. D. Likhovol
Keyword(s):  
Nonstationary Filtration ◽  
Spherical Sink

Energy expenditure in the densification of porous bodies

1978 ◽  
Vol 17 (9) ◽  
pp. 668-671 ◽  
Author(s):  
V. V. Skorokhod ◽  
L. I. Tuchinskii
Keyword(s):  
Energy Expenditure ◽  
Porous Bodies

THE FLOW OF FLUIDS THROUGH ACTIVATED CARBON RODS.

1952 ◽  
Vol 30 (4) ◽  
pp. 348-371 ◽  
Author(s):  
E. A. Flood ◽  
R. H. Tomlinson ◽  
A. E. Leger
Keyword(s):  
Activated Carbon ◽  
Relative Pressure ◽  
End Effects ◽  
Flow Rates ◽  
Frequency Distributions ◽  
Literal Sense ◽  
Fine Grained ◽  
Porous Bodies ◽  
Carbon Rods ◽  
Flow Through

The flow rates of the vapors of benzene, ethyl chloride, diethyl ether, methanol, and water through activated carbon rods have been found to exceed, considerably, flow rates calculated by classical equations. The excess flow rates show maxima in widely different relative pressure regions and are ascribed to flow of adsorbed material. An empirical equation is presented which correlates the observed flow rates with relevant adsorption isotherms. Classical equations of flow through elliptical and rectangular pipes are discussed with reference to flow through fine-grained porous materials. It is shown that equations of the Adzumi type are roughly valid as applied to fine-grained porous bodies, but that without a knowledge of the frequency distributions of pore sizes and shapes, flow data cannot be related to pore dimensions in any literal sense. End effects are discussed.

Drying mechanism of capillary-porous bodies

1970 ◽  
Vol 19 (3) ◽  
pp. 1123-1131 ◽  
Author(s):  
R. Toei ◽  
M. Okazaki
Keyword(s):  
Porous Bodies

Position of cones within cone clusters determines seed survival in black spruce during wildfire

2019 ◽  
Vol 49 (2) ◽  
pp. 121-127 ◽  
Author(s):  
T.B. Splawinski ◽  
D.F. Greene ◽  
S.T. Michaletz ◽  
S. Gauthier ◽  
D. Houle ◽  
...  
Keyword(s):  
Black Spruce ◽  
Seed Viability ◽  
Heat Fluxes ◽  
Wake Flow ◽  
Windward Side ◽  
Fire Intensity ◽  
Burned Area ◽  
Individual Plant ◽  
Buoyant Plumes ◽  
Porous Bodies

It has recently become clear that the regeneration density of serotinous species within a burned area declines with local fire intensity. It is assumed that this occurs because variation in local fire intensity leads to variation in incident heat fluxes and, ultimately, seed necrosis. We argue here that this same relationship between incident heat flux and seed necrosis is important at the scale of individual plant crowns. Using Picea mariana (Mill.) B.S.P. (black spruce), we show that postfire seed viability increases with crown height, depth into the crown, and angle from wind direction (with the windward side enjoying greater viability). All three effects are what one would expect given the physics of buoyant plumes, interactions of moving fire lines with wake flow around cylinders, and heat transfer in porous bodies such as a tree crown. We conclude by discussing the broader consequences of cone cluster size and global change on regeneration in serotinous species.

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