WebDec 18, 2024 · Capillary rheometers have been widely used for the rheological measurement of polymer melts. However, when micro capillary dies are used, the results are usually neither accurate nor consistent, even under the same measurement conditions. In this work, theoretical modeling and experimental studies were conducted for a more profound … WebOct 21, 2024 · The Mooney wall slip correction procedure is sometimes mandatory in the rheological characterization via capillary viscometry of certain complex fluids that have the ... also the Mooney and the Weissenberg–Rabinowitsch procedures must be performed: the former corrects for problems of slippage at solid walls, while the ...
Basic Concepts in Polymer Melt Rheology and Their
WebThe use of additives (polyisobutylene, ethylene-propylene, lithium hydroxy stearate, hydrophobic silica, etc.) changes lubricants’ rheology due to which they show pseudoplastic and dilatant nature, which can be modelled as cubic … WebIn practice, for most of the high-viscosity materials, Bagley and Weißenberg-Rabinowitsch correction is used. In a high-pressure capillary rheometer with two test barrels, the … problems running halo infinite
Hydrodynamic self-lubricating journal bearings analysis using ...
WebJan 11, 2014 · In this work, we present a way to make rheological measurements on a microfluidic chip. The originality of our approach relies on the determination of the flow … WebDec 1, 2024 · Some of them have been successfully applied in mechanics of thin viscous films, such as the power law model [1], the couple stress [2] and Rabinowitsch model [3]. Recently, the rheological behavior of Rabinowitsch fluid in the lubrication mechanism is analyzed by Huang et al. [4], Walicka et al. [5], Charles et al. [6] and Rahmani et al. [7]. WebRabinowitsch and the function that results is the Rabinowitsch equation. Q is defined by, Q = 2π rv z (r) r= 0 r=∫R dr Integration by parts and substitution of the rate of strain for -dv z/dr yields, Q = π γ ˙ rz 0 R∫ r2 dr under the assumption that v(r) is 0 at r = R and that the rate of strain is 0 at r = 0. Next a regine chopinot adn