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Teorie elektrodifuzních čidel tření v mikrodisperzních kapalinách 7. Vliv podélné difuze pro pásková čidla
Wein, Ondřej
Full 2D equations of convective diffusion are solved numerically for a finite strip electrodiffusion probe in a stream of microdisperse liquid, for near-to-wall non-linear velocity profiles ranging from constant shear rate flow to ideal slip. The modified Peclet number H, ranging from 0.01 (almost no convection) to 100 (diffusion layer regime), covers all cases of possible experimental relevance.
Teorie elektrodifuzních čidel třeni v mikrodisperzních kapalinách 8. Vliv zdánlivého skluzu na směrové charakteristiky
Wein, Ondřej
Insulated insertions between individual segments of direction-sensitive electrodiffusion friction probes attenuate the directionalsensitivity. Quantitative study of this effect by Wein and Wichterle (1989) for Newtonian liquids has been extended in a recent research report (Wein 2007) for the microdisperse liquids, displaying the Apparent Wall Slip, i.e. a non-linear velocity profile close to solid surfaces. In the present research report, this theory is used to the simulation calculations of directional characteristics for a class of 3-segment electrodiffusion friction probes with the insulating insertions. Rather realistic model of non-ideal 3-segment direction-specific probes is tested by comparison of the predictions with experimental data about an actual 3-segment probe in both homogeneous and microdisperse liquids.

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