Labyrinth factor

Usually the labyrinth factor is abbreviated wit 1 however, this symbol was already used for the residence time. 

The deviation of the pore geometry from the ideal cylindrical form is taken into account by the labyrinth factor which often Ues on the order of magnitude of 1/2 to 1 /6. Thus, the effective diffusion coefficient in pores is is obtained from the binary diffusion coefficient according to Equation (2.1-26). 

Labyrinth Factor. A correction to be applied in calculating the gas permeability of a porous refractory, to allow for the diminished air flow because pores are neither circular nor straight. The labyrinth factor is the ratio of that part of the total porosity which contributes to the air-flow, to the total porosity. 

The values of gas permeabiUty usually differ, depending on the measurement in the direction of pressing and perpendicular to the direction of pressing. The value of the gas permeability may differ two times and even more at room temperature and at a temperature of 1,000-1,200 °C. Sometimes for research needs, in order to describe the pore structure, researchers use the labyrinth factor or coefficient of tortuosity for tunnel pores. 

Figure D-4. Residual energy factors for straight labyrinths. (Reprinted by permission and courtesy of A-C Compressor Corporation)...

The following factors have been suggested as alternatives to consider when presented with a potential case of exposure to carbon monoxide diabetic ketoacidosis, hypothyroidism and myxedema coma, labyrinthitis, and lactic acidosis toxic exposures resulting in methemoglobinemia ingestion of alcohols or narcotics and diseases that cause gastroenteritis, encephalitis, meningitis, and acute respiratory distress syndrome. 

The intricacy of the intact animal body is further illustrated by the example of the cytokine, tumor necrosis factor (TNF). Table 16.2 shows the spectrum of biologically active molecules that are induced by TNF and Table 16.3 lists the wide variety of biological effects observed in animals to which TNF has been administered. Figures 16.1 to 16.3 show the labyrinth of biochemical cross-talk within and among cells in the body. 

Rotor Thrust Problems Thrust loads in compressors due to aerodynamic forces are affected by impeller geometry, by pressure rise through the compressor, and by internal leakage due to labyrinth clearances. The impeller thrust is calculated by using correction factors to account for internal leakage, and a balance piston size is selected to compensate for the impeller thrust load. The common assumptions made in the calculation are... 

Let us consider two important factors, the two poles of the creation of art the artist on the one hand, and, on the other, the spectator, who later becomes the posterity. To all appearances, the artist acts like a mediumistic being who, from the labyrinth beyond time and space, seeks his way out to a clearing. If we give the attributes of a medium to the artist, we must then deny him the state of consciousness on the esthetic plane about what he is doing or why he is doing it. All of his decisions in the artistic execution of the work rest with pure intuition and cannot be translated into a self-analysis, spoken or written, or even thought out. ... 

Case (C) involves three (electron) densities, one for each labyrinth and one for the surface layer. Because relative intensities are all that are usually measured, only one parameter is needed to allow for any combination of three densities. The scattering function calculated in case (B) is frequently referred to as the structure factor of the surface for a minimal surface characterized by a self-dual skeletal graph, this will correspond to a different space group than that of (A) or (C), or of case (B) with nonzero mean curvature (see the D family, above). 

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