Obtaining data electromagnetic effects

Electromagnetic measurements of high conductivity soil-fluid mixtures at low frequencies are difficult to obtain due to electrode polarization. Caution must be used when interpreting data in the literature, as electrode effects may be viewed as being material behaviour. In addition, difficulties with data interpretation arise at kHz and MHz frequencies for clay-fluid mixtures due to the possible manifestation of both double layer polarization and interfacial polarization phenomena. 

Note that Eqs (82)-(85) hold not only for an emulsion film formed between two oil drops, but also for a foam film intervening between two gas bubbles. In Fig. 18 we compare the predietion of Eqs (82)-(84) with experimental data for versus R, obtained by Manev et al. (120) for foam films formed from an aqueous solution of 0.43 mM SDS -i- 0.1 M NaCl. The mobility faetor f2y(/j) was calculated by using the exact expression (the infinite series) from Ref 137. Parameters such as CO, Eq, T i and 5Fj/Scj, see Eqs (53)-(55), are obtained from the experimental fit in Ref 17, in the same way as the numerical data in Fig. 5 have been obtained (see Sec. II.A.2). The disjoining pressure was attributed to the van der Waals attraction n = -A- 6nh ). To account for the effect of the electromagnetic retardation on the dispersion... 

Experimental studies of the effect of blocking some part (55 %) of the flow section upon the velocity and temperature fields in a fuel subassembly were continued. The measurements of longitudinal and transverse velocity components have been made by the electromagnetic method with using a local-action sensor. The results obtained have been compared with the corresponding data for a model with smooth pins. 

---