球・ばね・ダンパマクロモデルによる粘弾性流体の基本流動解析 : (ダンパ要素と第二法線応力差発生のメカニズム)

概要

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Flow of viscoelastic fluid is commonly analyzed by using constitutive equations. In this paper, bead-spring-damper macro model is proposed as an alternative to analyze viscoelastic flow. The tetrahedral structure of beads, springs and dampers models a gathering of intertwined polymer chains. Behavior of the bead-spring-damper structure is computed under simple shear flow condition. Shear-thinning of shear viscosity and the mechanism of second normal stress difference generation are investigated. The results show that the phase lag of the tension, caused by the damper element, is the mechanism of second normal stress difference generation, and that the bead-spring-damper macro model can express characteristics of viscoelastic fluid consistently.
社団法人日本機械学会の論文
2000-08-25