Rod-climbing effect
Web23 Jun 2024 · When the rod is rotated, the PEO solution is subject to the dual effects of shear deformation and elastic restoring force, thus producing the rod climbing effect. … Web1 Jan 2015 · The rod climbing effect, also known as Weissenberg effect, occurs in non-Newtonian fluids due to imbalance in normal stresses which pull the liquid inwards and …
Rod-climbing effect
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http://web.mit.edu/nnf/research/phenomena/rodclimbing.html 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.
WebWeissenberg Effect Weissenberg Effect. Also known as the rod climbing effect, this is due to additional stresses arising in a viscoelastic fluid when it is stirred. These stresses — which are called normal stresses — act in the direction of motion, causing a tension force which pulls the fluid towards the stirring rod. An example can be ... Web12 Feb 2024 · Abstract: The rod-climbing or Weissenberg effect in which the free surface of a complex fluid climbs a thin rotating rod is a popular and convincing experiment …
Web1 Jun 1985 · The rod-climbing effect is one of the most striking manifestations of normal stresses in polymeric liquids, as evidenced by the fact that it was the first such effect to … Web18 Nov 2004 · This spectacular rod climbing is due to the normal stresses present in the polymer fluid and is thus a purely non-Newtonian effect. A similar rod climbing of an …
Web1 Dec 2004 · This spectacular rod climbing is due to the normal stresses present in the polymer fluid and is thus a purely non-Newtonian effect. A similar rod climbing of an …
Web14 Jul 2007 · 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 s... downeast ogdenWeb(07 M) Phot rod-climbing effect is shown in the sketch below (Pieter Baart, Piet M. Lugt & Braham Prakash (2010) Non-Newtonian Effects on Film Formation in Grease- Lubricated. … down east offroad facebookWeb17 Oct 2024 · Experiments and theoretical investigations [115,116,117,118] with Weissenberg effect (rod-climbing effect) involve rigid, cylindrical rods. However, it is … down east of new bern ncWebThis rod climbing effect has important repercussions for polymer solution processing. For a more detailed explanation, and more photographs, see for example pp. 11-19 of D. V. Boger and K. Walters (1993), Rheological Phenomena in Focus , Elsevier Science Publishers, … Shabnam Raayai-Ardakani studies the effect of different geometric parameters … Massachusetts Institute of Technology Cambridge MA 02139-4307 Accessibility. … Rathinaraj JDavid John, Keshavarz B, McKinley GH.2024. Why the Cox–Merz … Home Page Slider. Direct links to descriptions of slides on the website … Doctoral Hooding Ceremony, June 2024. Group Lunch with Prof. Dimitris … During a pandemic, Anoop Rajappan successfully defended his PhD thesis. … Our Commitment. MIT is committed to providing an environment that is … claiborne smith baton rouge laWebRod climbing can occur, where the material being mixed climbs up the stirrer or mixer shaft rather than forming a centrifugal vortex. ... On filling, die swell effects lead to reduced … downeast oil companyWeb31 Aug 1998 · The treatment includes (and generalizes) a known exact low‐shear‐rate limiting condition β 0 <0.25 for rod climbing, where β 0 denotes the low‐shear‐rate limiting value of β:=− N2 / N1. Using published experimental data for N1 (σ) and N2 (σ) to evaluate R, we find that positive Weissenberg effects are predicted for ... claiborne slim fit roll sleeve shirtWebarXiv.org e-Print archive claiborne smith