Density coefficient

Recommended limiting maximum heat flux for the tube density coefficient ... 

The tube density coefficient, c[), is given in Table 10-27. The tube wall resistance cannot be ignored for reboilers. Based on the outside tube diameter, ... 

Lohse et al. have summarized the results of recent work in this area [21]. The focus of the work is obtaining the interaction parameter x of the Hory-Huggins-Stavermann equation for the free energy of mixing per unit volume for a polymer blend. For two polymers to be miscible, the interaction parameter has to be very small, of the order of 0.01. The interaction density coefficient X = ( y/y)R7 , a more relevant term, is directly measured by SANS using random phase approximation study. It may be related to the square of the Hildebrand solubility parameter (d) difference which is an established criterion for polymer-polymer miscibility ... 

The least-squares Molly program based on the Hansen-Coppens model [10] was used to determine atomic coordinates, thermal parameters and multipolar density coefficients in scolecite. In the Hansen-Coppens model, the electron density of unit cell is considered as the superposition of the pseudo-atomic densities. The pseudoatom electron density is given by... 

Temperature, °C. Density. Coefficient of Expansion. Temperature, "C. Density. Coefficient of Expansion. 

It can be shown that the ratio v3lvg is equal to the ratio of polymer packing densities coefficients in the amorphous and crystalline states, KJKC at Tg, because, by definition, Ka = NA V /va and Kc - NA Vi/yC)where vj is the Van der Waals volume of the chain repeat unit. The calculated values of (ATc)g correlate with the characteristic chain parameter a/o, the relationship between them being expressed by a linear equation... 

This metal is similar to U chemically it is pyrophoric and must be handled with extreme care owing to the health hazard. Also, above a certain critical size the pure metal can initiate a nuclear explosion. The metal is unique in having at least six allotropic forms below its melting point, each with a different density, coefficient... 

To evaluate the right side of Eq. (F.28) we consider first the diargc-density coefficients p( (fe) that give rise to the potential for gmall, but nonvanishing fc. Expanding these coefficients in a Taylor series around fc = 0 and using Laplace s equation (see Eq. (F.21)], we obtain... 

The stress-strain behavior of thermosets (glassy polymers crosslinked beyond the gel point) is not as well-understood as that of elastomers. Much data were analyzed, in preparing the previous edition of this book, for properties such as the density, coefficient of thermal expansion, and elastic moduli of thermosets [20,21,153-162]. However, most trends which may exist in these data were obscured by the manner in which the effects of crosslinking and of compositional variation were superimposed during network formation in different studies, by... 

Formulation (composite s density) Coefficient of thermal expansion, XIO 1/°F... 

We shall consider the BGY2 equations in the present series of investigations. Section II of this report gives a mathematical formulation of the problem. In Section III, we expand the pressure P, the distribution functions g a andgi23 by density series and calculate the first several density coefficients for hard spheres. The final section is reserved for discussions of the results. From the... 

In the following discussions, we use the hard-sphere potential to calculate the density coefficients in (20). The hard-sphere potential Oj, is given by... 

The solubility constant of the noble gases in oil is dependent on oil density. Coefficients taken from Kharaka and Specht (1987) for two oils fit the equation Log(K ) = A + BT where the solubility constant K follows the molality convention and is in units of atm Kg mof . T is temperature in °C. The vahd temperature range for the determination is 25-100 °C. 

The shape that can be assumed by a drop in a gas flow depends on the character of the flow in the vicinity of the drop, as well as the properties of both the liquid and the gas, such as density, coefficient of viscosity and coefficient of surface tension. The three basic kinds of drop deformations (Fig. 17.11) are described in [46]. 

We can ascribe the same kinds of mathematical and physical interpretations to the pressure coefficients as we did to the density coefficients, but the two sets of coefficients differ numerically. We can see this merely by considering units the primed coefficients have dimensions that are powers of F" while the unprimed coefficients have dimensions in powers of p . ... 

This progression constitutes an approach towards a symmetrical octahedral environment for each pnictide atom (as in cubic black P), and is in accord with the increasing metallic character shown as the pnictides become heavier. This metallic character is indicated by the changing appearance and increasing values of density, coefficients of expansion, electrical and thermal conductivities which are observed on moving from phosphorus through to bismuth. 

Densities, Coefficients of Thermal Expansion, and Compressibilities of Amorphous Polymers... 

According to the theory of composite systems [56], the existence of intermediate layer between two metals is inevitable in multilayered laminar metal structures. The thickness of the intermediate layer is usually of the order of couple atomic layers, and the parameters of the system (concentration of individual metals, crystal structure. Young s modulus, density, coefficient of thermal expansion, etc.) change from one layer to another. Usually such intermediate layer is composed of two layers of solid solutions and one layer of intermetallic compound, as it is schematically presented in Fig. 7.33. 

The large and negative moderator density coefficient at operating power levels is due to the steam void effect. This steam void effect results in the operating advantages listed below. 

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