The weissenberg effect
WebThis phenomenon was apparently first observed by Weissenberg and Russell 1, and in 1949 Reiner, Scott Blair and Hawley 2 suggested that it be described as the ‘Weissenberg effect’. WebJul 14, 2007 · 0:00 / 1:43 The Weissenberg Effect psidot 1.27K subscribers 397K views 15 years ago When a rod mounted in a hand drill is dipped into a liquid and rotated, for …
The weissenberg effect
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WebMay 2, 2016 · 20K views 6 years ago In 1947, Karl Weissenberg published a paper discussing the ability of some fluids to climb a spinning rod. This phenomena, commonly … WebAls Weissenberg-Effekt (nach dem Physiker Karl Weissenberg) wird in der Rheologie das Verhalten mancher nichtnewtonscher Flüssigkeiten bezeichnet, die an einem rotierenden …
WebApr 12, 2024 · The high Weissenberg number case is substantially “less smooth” and thus more difficult to approximate numerically. For the low Weissenberg number \(\mathcal {W}e = 0.1\) the solution can be obtained without any added stabilization, which corresponds to setting \(\alpha =0\). Such solution (of the original, non-diffusive problem) can be ... WebAug 7, 2014 · The thing we see today is called the Weissenberg effect and this is how it works. You take a spinning rod and put it into a solution of liquid polymer (which is usually …
WebWeissenberg Effect The Weissenberg Effect is the instance where a polymer travels up a rod, in contrast to say water that moves away from the rod as it spins. By considering the … WebApr 3, 2024 · The previously established effect of the yield stress in suppressing plug formation [Shemilt et al., J. Fluid Mech., 2024, vol. 944, A22] is shown to be amplified by introducing surfactant. ... (min) normally decreases to zero faster with increasing relaxation time parameter, the Weissenberg number The authors, and has a significant effect on ...
WebWeissenberg effect. [ ′vīs·ən‚bərg i‚fekt] (fluid mechanics) An alteration of the normal stresses in a non-Newtonian fluid on account of elasticity, so that such a fluid, when …
The Weissenberg effect is a phenomenon that occurs when a spinning rod is inserted into a solution of elastic liquid. Instead of being thrown outward, the solution is drawn towards the rod and rises up around it. This is a direct consequence of the normal stress that acts like a hoop stress around the rod. The effect is a common example of Non-Newtonian fluid dynamics, such as they occur in polysterene polymer. The effect is named after Karl Weissenberg. formica marble look countertopsWebThe "Weissenberg Effect" or "Rod-Climbing Experiment" In this video clip a dilute (0.025 wt%) solutionof a high molecular weight (2×10 6 g/mol) polystyrene polymer (Polysciences Inc) is dissolved in a low molecular … different types of companies australiaWebAkyildiz [1] studied a similar problem and discussed the effects of Weissenberg number (related to the elasticity of the fluid) and the viscosity ratio on the flowfield. In all the cases mentioned so far, it is assumed that the cylinder is immersed in a fluid. It is, however, also possible to study the internal flow, i.e., flow inside a ... formica metal earthWebJul 1, 2024 · We investigate the Weissenberg effect, i.e., the normal stress effect or the elastic effect, of the turbulence of a Newtonian fluid. We put forth a general Weissenberg … formica microgynaWebChapter formica matte blackWebApr 14, 2024 · When the Weissenberg effect was observed, the reaction was stopped. Then, the reaction system was restored to atmospheric pressure, and the target raw copolyester was obtained without any further purification. This copolyester was named as PBFSu40 with 40 representing the molar percentage (%) of succinic acid in feed. different types of companies in singaporeWebSep 21, 2015 · The Weissenberg Effect happens when a fluid behaves in a very counter-intuitive way. Instead of being driven away from a spinning object, it starts climbing. Take … formica melbourne