The weissenberg effect
WebSep 16, 2008 · When a rod mounted in a hand drill is dipped into a liquid and rotated, for certain non-Newtonian fluids the liquid will climb the rod - sometimes to quite spectacular … WebRod Climbing - The Weissenberg Effect. A dilute solution (0.025 wt%) of a high molecular weight (2 ×10 6 g/mol) polystyrene polymer (Polysciences Inc.) is dissolved in a low molecular weight (~100 g/mol), Newtonian, …
The weissenberg effect
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WebAkyildiz [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 ... WebJul 1, 2024 · Within the framework of the Navier–Stokes equations, the Weissenberg effect of turbulence is investigated. We begin with our investigation on the elastic effect of homogeneous turbulent shear...
WebThe governing equations are solved using the finite-difference method, and, a thorough analysis on the effect of the model parameters α and β is presented. The numerical results showed that in the creeping flow limit (Re=0), the development length for the velocity exhibits a non-monotonic behaviour. ... increases slightly with the Weissenberg ...
WebWeissenberg effect: When an elastic polymer solution kept in a beaker is stirred, the solution climbs the stirring rod. (b) Barus effect: The polymer solution swells when squeezed … 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 …
WebApr 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.
WebOne example is the Weissenberg Effect (see Fig. 3.10), which arises when a shaft rotates within a viscoelastic fluid. The first normal stress difference leads to a pressure … hbs 1125WebApr 14, 2024 · The effect of viscoelasticity on the velocity distribution is presented in panel 6(c); here, we consider ε ̃ W i 2 = 0.1, 1, 2 for both the lPTT and the gPTT models. Also, the Joule heating and Soret effects are present with γ θ = 0.06 and S T, 0 = 6.94, respectively, considering κ 0 = 50; also, the gPTT model is evaluated with α = β = 1. goldbox michael aftonWebThe 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 … hb s125WebExtensive experience in all aspects of implementation and deployment of high value technology assets. Powerful problem solving techniques with a CAN do attitude. Large-scale knowledge of ... gold box mediaWebApr 13, 2024 · The Weissenberg number describes the ratio of elastic to viscous forces, and here we limit the analysis to Wi Λ ≪ 1 (that is, Wi Λ ≈ 10 −3), to ensure that elastic effects are subdominant ... gold box helperWebWeissenberg 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 … hbs1-agq16fWebDiscuss the parameters that govern the Weissenberg effect. and explain why each of the parameters influence the effect in brief words its fine Expert Answer The following … hbs 1100 bluetooth