Load-transfer zones

Fig. 6 indicates how the adherend stresses drop to zero at one or other end of the bonded overlap and that, as a consequence of this, there are differential movements between the adherends, across the bond line, that result in adhesive shear stresses, and strains, that peak at the ends and are reduced throughout the elastic trough in the interior. If the load is high enough, the adhesive will go plastic in the load transfer zones at the ends. These zones are shown by... 

The required desiccant weight is a function of several factors the water removal requirements (mass/time), the cycle time, the equiUbrium loading of water on the desiccant at the feed conditions, the residual water loading on the desiccant after regeneration, and the size of the mass-transfer zone of the desiccant bed. These factors, in turn, depend on the flow rate, temperature, pressure, and water content of both the fluid being dried and the regeneration fluid (see Adsorption, gas separation). 

The packed bed breakthrough method for investigation of mass transfer phenomena in sorbent systems can in many instances offer certain advantages not found in other experimental methods. The method is especially useful when the adsorption isotherms for the principal sorbate exhibit favorable curvature (convex toward loading axis). In such a case, there is the potential for a portion of the sorption front to approach a stable wave form (shape of the front invariant with time). Given the existence of a stable or "steady-state" mass transfer zone (MTZ) and a detailed knowledge of the equilibrium loading characteristics within that zone, one can extract local values of the effective mass transfer resistance at any concentration in the zone. 

Fig. 6.19 The basis of the mesoscale model of Rouby and Reynaud. The axial stress, oy in the fiber decreases linearly over the slip length, from a peak value of oy° at the edge of the matrix crack, to a value of o(Ef/Ec) at the end of the slip-zone (z = ls). It is assumed that the crack spacing / is larger than twice the load transfer length /,. It is assumed that the fiber stress decreases linearly to zero over the load transfer length l,. After Rouby and Reynaud.46...

The transfer zone of the pool is equipped with a load accompanying device of the transfer lead cask. 

Since it is difficult to obtain point by poim concentration data in adsoiption beds, most dynamic adsorption data are obtained in the form of Fig. 12.7-10, In Fig- 12.7-la, the area iebai represents ihe uptake of the adsorbate, as does the stoichiometric area Idea, and can therefore be used to calculate (he equilibrium loading. If a stable mass transfer zone has developed. Ihe breakthrough time 0 and the "stoichiometric time 9., can be used to calculate LUB by the equation... 

An isotherm that is concave upward is called unfavorable because relatively low solid loadings are obtained and because it leads to quite long mass-transfer zones in the bed. Isotherms of this shape are rare, but they are worth studying to help understand the regeneration process. If the adsorption isotherm is favorable, mass transfer from the solid back to the fluid phase has characteristics similar to those for adsorption with an unfavorable isotherm,... 

Designed, fabricated, and installed a generic fuel processor and test stand to study the heat transfer characteristics of monolith loaded reaction zones. 

In Fig. 9.5-9 it is assumed that the temperature front (Wjj the velocity of the temperature transfer zone ) is moving with a higher speed than the ( mass transfer Zone or the breakthrough curve. In the left figure the courses of the fluid load-... 

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