Magnetic monitoring of ferrous impurities in industrial and motor oils

On the Influence of Viscosity and Density of a Liquid Medium on Efficiency of Magnetophoresis. Role of Temperature

“…While it is different for different environments, it is known to vary significantly also for the same environment: depending on its temperature. Of course, this is reflected in the results of magnetophoresis, as evidenced by a number of direct data [9,[13][14][15][16][17]. In the same cases, when information about this factor (thermo-viscosity) is not provided or it is insufficiently complete, there may even be an opinion about the "inconsistency" of the results (at first glance, under the conditions of obtaining them, as it were).…”

“…In addition, as it is reflected in (1), the expression for ψ is valid with the obligatory limitation of the speed υf by the maximum permissible value υf = [υf] -based on the criterion (for this variant of magnetophoresis) value of the Reynolds number Re [1,13], where v = η / ρ is the kinematic viscosity of the medium, and ρ is its density.…”

“…If we have analytical (phenomenological) temperature dependences of the viscosity η of liquid (liquid-dispersed) media [1,13,17], then one or another of them can be used in (1) to clearly reflect the role of the parameter t in the corresponding expressions for the efficiency ψ magnetic release and limiting regime speed [υf], where the parameter t does not appear explicitly.…”

“…As for obtaining analytical expressions that would allow one to approximate the existing temperature dependences of the viscosity η of a particular medium (Fig. 1, a, b), for this it is advisable to use a fairly practical approach [1,13,17], depicting one or another dependence η on t, for example, in semi-logarithmic coordinates. So, if in the most interesting temperature range t (for performing a certain version of magnetophoresis), the considered dependence of η on t, being depicted in one of two types of such coordinates, is quasi-linearized, then this indicates its correspondence to the logarithmic or exponential functions.…”