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|Title:||Computer simulation of viscoelastic flow at the entry region||Authors:||Loh, K.W.L.
|Issue Date:||1996||Citation:||Loh, K.W.L.,Teoh, S.H.,Tay, A.A.O. (1996). Computer simulation of viscoelastic flow at the entry region. Polymer Engineering and Science 36 (3) : 368-377. ScholarBank@NUS Repository.||Abstract:||Non-Newtonian flow has a nonlinear constitutive relationship with an advective nature. It was found that in highly advective (convective) problems, the Galerkin formulation "under-diffused," resulting in divergence at low elastic numbers. The use of the Streamline-Upwinding (SU) method improved the solution, especially when used with the Phan-Thien-Tanner (PTT) model. At the boundary discontinuity, however, the stress gradient did not necessarily flow along the streamline direction, and oscillations still remained at the corner. The Discontinuity-Capturing (DC) method resolved this problem by applying control in the direction of the stress gradient rather than the stream line direction, and a smoother solution at the corner region was achieved.||Source Title:||Polymer Engineering and Science||URI:||http://scholarbank.nus.edu.sg/handle/10635/58023||ISSN:||00323888|
|Appears in Collections:||Staff Publications|
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