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Materiale Plastice
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https://doi.org/10.37358/Mat.Plast.1964

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Materiale Plastice (Mater. Plast.), Year 2014, Volume 51, Issue 3,





VIOREL-PUIU PAUN, VALENTIN NEDEFF, DAN SCURTU, GABRIEL LAZAR, VLAD GHIZDOVAT, MARICEL AGOP, LAURA-GHEUCA SOLOVASTRU, RADU FLORIN POPA Stopper Effects in Network Type Polymers


Abstract:
The specific parameters describing the flows of Bingham type rheological fluids through a circular pipe, under the action of a pressure gradient in the direction of the movement are established, using the Non-Standard Scale Relativity Theory approach. In such context, an analytical solution and a numerical application (for KELTAN 4200 - an etilene-co-propilene copolymer) are obtained. The friction effort has two components, one of specific fluid gliding, the other of shearing, depending on transverse speed gradient. In the central area of the fluid movements a particles agglomeration (fluid stopper) occurs, defined by a constantly moving structure. Keywords: rheology, friction effort, polymers, fluid stopper, speed



Issue: 2014 Volume 51, Issue 3
Pages:
Publication date: 2014/9/30
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